Repository: commons-text
Updated Branches:
  refs/heads/master 0bf361aaa -> 978e2896d


http://git-wip-us.apache.org/repos/asf/commons-text/blob/978e2896/src/test/java/org/apache/commons/text/TextStringBuilderTest.java
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+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.commons.text;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertNotNull;
+import static org.junit.Assert.assertNotSame;
+import static org.junit.Assert.assertNull;
+import static org.junit.Assert.assertSame;
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.fail;
+
+import java.io.IOException;
+import java.io.Reader;
+import java.io.StringReader;
+import java.io.StringWriter;
+import java.io.Writer;
+import java.nio.ByteBuffer;
+import java.nio.CharBuffer;
+import java.nio.charset.Charset;
+import java.util.Arrays;
+
+import org.apache.commons.text.matcher.StringMatcher;
+import org.apache.commons.text.matcher.StringMatcherFactory;
+import org.junit.Test;
+
+/**
+ * Unit tests for {@link TextStringBuilder}.
+ */
+public class TextStringBuilderTest {
+
+    // -----------------------------------------------------------------------
+    @Test
+    public void testConstructors() {
+        final TextStringBuilder sb0 = new TextStringBuilder();
+        assertEquals(32, sb0.capacity());
+        assertEquals(0, sb0.length());
+        assertEquals(0, sb0.size());
+
+        final TextStringBuilder sb1 = new TextStringBuilder(32);
+        assertEquals(32, sb1.capacity());
+        assertEquals(0, sb1.length());
+        assertEquals(0, sb1.size());
+
+        final TextStringBuilder sb2 = new TextStringBuilder(0);
+        assertEquals(32, sb2.capacity());
+        assertEquals(0, sb2.length());
+        assertEquals(0, sb2.size());
+
+        final TextStringBuilder sb3 = new TextStringBuilder(-1);
+        assertEquals(32, sb3.capacity());
+        assertEquals(0, sb3.length());
+        assertEquals(0, sb3.size());
+
+        final TextStringBuilder sb4 = new TextStringBuilder(1);
+        assertEquals(1, sb4.capacity());
+        assertEquals(0, sb4.length());
+        assertEquals(0, sb4.size());
+
+        final TextStringBuilder sb5 = new TextStringBuilder((String) null);
+        assertEquals(32, sb5.capacity());
+        assertEquals(0, sb5.length());
+        assertEquals(0, sb5.size());
+
+        final TextStringBuilder sb6 = new TextStringBuilder("");
+        assertEquals(32, sb6.capacity());
+        assertEquals(0, sb6.length());
+        assertEquals(0, sb6.size());
+
+        final TextStringBuilder sb7 = new TextStringBuilder("foo");
+        assertEquals(35, sb7.capacity());
+        assertEquals(3, sb7.length());
+        assertEquals(3, sb7.size());
+    }
+
+    // -----------------------------------------------------------------------
+    @Test
+    public void testChaining() {
+        final TextStringBuilder sb = new TextStringBuilder();
+        assertSame(sb, sb.setNewLineText(null));
+        assertSame(sb, sb.setNullText(null));
+        assertSame(sb, sb.setLength(1));
+        assertSame(sb, sb.setCharAt(0, 'a'));
+        assertSame(sb, sb.ensureCapacity(0));
+        assertSame(sb, sb.minimizeCapacity());
+        assertSame(sb, sb.clear());
+        assertSame(sb, sb.reverse());
+        assertSame(sb, sb.trim());
+    }
+
+    // -----------------------------------------------------------------------
+    @Test
+    public void testReadFromReader() throws Exception {
+        String s = "";
+        for (int i = 0; i < 100; ++i) {
+            final TextStringBuilder sb = new TextStringBuilder();
+            final int len = sb.readFrom(new StringReader(s));
+
+            assertEquals(s.length(), len);
+            assertEquals(s, sb.toString());
+
+            s += Integer.toString(i);
+        }
+    }
+
+    @Test
+    public void testReadFromReaderAppendsToEnd() throws Exception {
+        final TextStringBuilder sb = new TextStringBuilder("Test");
+        sb.readFrom(new StringReader(" 123"));
+        assertEquals("Test 123", sb.toString());
+    }
+
+    @Test
+    public void testReadFromCharBuffer() throws Exception {
+        String s = "";
+        for (int i = 0; i < 100; ++i) {
+            final TextStringBuilder sb = new TextStringBuilder();
+            final int len = sb.readFrom(CharBuffer.wrap(s));
+
+            assertEquals(s.length(), len);
+            assertEquals(s, sb.toString());
+
+            s += Integer.toString(i);
+        }
+    }
+
+    @Test
+    public void testReadFromCharBufferAppendsToEnd() throws Exception {
+        final TextStringBuilder sb = new TextStringBuilder("Test");
+        sb.readFrom(CharBuffer.wrap(" 123"));
+        assertEquals("Test 123", sb.toString());
+    }
+
+    @Test
+    public void testReadFromReadable() throws Exception {
+        String s = "";
+        for (int i = 0; i < 100; ++i) {
+            final TextStringBuilder sb = new TextStringBuilder();
+            final int len = sb.readFrom(new MockReadable(s));
+
+            assertEquals(s.length(), len);
+            assertEquals(s, sb.toString());
+
+            s += Integer.toString(i);
+        }
+    }
+
+    @Test
+    public void testReadFromReadableAppendsToEnd() throws Exception {
+        final TextStringBuilder sb = new TextStringBuilder("Test");
+        sb.readFrom(new MockReadable(" 123"));
+        assertEquals("Test 123", sb.toString());
+    }
+
+    private static class MockReadable implements Readable {
+
+        private final CharBuffer src;
+
+        MockReadable(final String src) {
+            this.src = CharBuffer.wrap(src);
+        }
+
+        @Override
+        public int read(final CharBuffer cb) throws IOException {
+            return src.read(cb);
+        }
+    }
+
+    // -----------------------------------------------------------------------
+    @Test
+    public void testGetSetNewLineText() {
+        final TextStringBuilder sb = new TextStringBuilder();
+        assertNull(sb.getNewLineText());
+
+        sb.setNewLineText("#");
+        assertEquals("#", sb.getNewLineText());
+
+        sb.setNewLineText("");
+        assertEquals("", sb.getNewLineText());
+
+        sb.setNewLineText((String) null);
+        assertNull(sb.getNewLineText());
+    }
+
+    // -----------------------------------------------------------------------
+    @Test
+    public void testGetSetNullText() {
+        final TextStringBuilder sb = new TextStringBuilder();
+        assertNull(sb.getNullText());
+
+        sb.setNullText("null");
+        assertEquals("null", sb.getNullText());
+
+        sb.setNullText("");
+        assertNull(sb.getNullText());
+
+        sb.setNullText("NULL");
+        assertEquals("NULL", sb.getNullText());
+
+        sb.setNullText((String) null);
+        assertNull(sb.getNullText());
+    }
+
+    // -----------------------------------------------------------------------
+    @Test
+    public void testCapacityAndLength() {
+        final TextStringBuilder sb = new TextStringBuilder();
+        assertEquals(32, sb.capacity());
+        assertEquals(0, sb.length());
+        assertEquals(0, sb.size());
+        assertTrue(sb.isEmpty());
+
+        sb.minimizeCapacity();
+        assertEquals(0, sb.capacity());
+        assertEquals(0, sb.length());
+        assertEquals(0, sb.size());
+        assertTrue(sb.isEmpty());
+
+        sb.ensureCapacity(32);
+        assertTrue(sb.capacity() >= 32);
+        assertEquals(0, sb.length());
+        assertEquals(0, sb.size());
+        assertTrue(sb.isEmpty());
+
+        sb.append("foo");
+        assertTrue(sb.capacity() >= 32);
+        assertEquals(3, sb.length());
+        assertEquals(3, sb.size());
+        assertFalse(sb.isEmpty());
+
+        sb.clear();
+        assertTrue(sb.capacity() >= 32);
+        assertEquals(0, sb.length());
+        assertEquals(0, sb.size());
+        assertTrue(sb.isEmpty());
+
+        sb.append("123456789012345678901234567890123");
+        assertTrue(sb.capacity() > 32);
+        assertEquals(33, sb.length());
+        assertEquals(33, sb.size());
+        assertFalse(sb.isEmpty());
+
+        sb.ensureCapacity(16);
+        assertTrue(sb.capacity() > 16);
+        assertEquals(33, sb.length());
+        assertEquals(33, sb.size());
+        assertFalse(sb.isEmpty());
+
+        sb.minimizeCapacity();
+        assertEquals(33, sb.capacity());
+        assertEquals(33, sb.length());
+        assertEquals(33, sb.size());
+        assertFalse(sb.isEmpty());
+
+        try {
+            sb.setLength(-1);
+            fail("setLength(-1) expected StringIndexOutOfBoundsException");
+        } catch (final IndexOutOfBoundsException e) {
+            // expected
+        }
+
+        sb.setLength(33);
+        assertEquals(33, sb.capacity());
+        assertEquals(33, sb.length());
+        assertEquals(33, sb.size());
+        assertFalse(sb.isEmpty());
+
+        sb.setLength(16);
+        assertTrue(sb.capacity() >= 16);
+        assertEquals(16, sb.length());
+        assertEquals(16, sb.size());
+        assertEquals("1234567890123456", sb.toString());
+        assertFalse(sb.isEmpty());
+
+        sb.setLength(32);
+        assertTrue(sb.capacity() >= 32);
+        assertEquals(32, sb.length());
+        assertEquals(32, sb.size());
+        assertEquals("1234567890123456\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 
sb.toString());
+        assertFalse(sb.isEmpty());
+
+        sb.setLength(0);
+        assertTrue(sb.capacity() >= 32);
+        assertEquals(0, sb.length());
+        assertEquals(0, sb.size());
+        assertTrue(sb.isEmpty());
+    }
+
+    // -----------------------------------------------------------------------
+    @Test
+    public void testLength() {
+        final TextStringBuilder sb = new TextStringBuilder();
+        assertEquals(0, sb.length());
+
+        sb.append("Hello");
+        assertEquals(5, sb.length());
+    }
+
+    @Test
+    public void testSetLength() {
+        final TextStringBuilder sb = new TextStringBuilder();
+        sb.append("Hello");
+        sb.setLength(2); // shorten
+        assertEquals("He", sb.toString());
+        sb.setLength(2); // no change
+        assertEquals("He", sb.toString());
+        sb.setLength(3); // lengthen
+        assertEquals("He\0", sb.toString());
+
+        try {
+            sb.setLength(-1);
+            fail("setLength(-1) expected StringIndexOutOfBoundsException");
+        } catch (final IndexOutOfBoundsException e) {
+            // expected
+        }
+    }
+
+    // -----------------------------------------------------------------------
+    @Test
+    public void testCapacity() {
+        final TextStringBuilder sb = new TextStringBuilder();
+        assertEquals(sb.buffer.length, sb.capacity());
+
+        sb.append("HelloWorldHelloWorldHelloWorldHelloWorld");
+        assertEquals(sb.buffer.length, sb.capacity());
+    }
+
+    @Test
+    public void testEnsureCapacity() {
+        final TextStringBuilder sb = new TextStringBuilder();
+        sb.ensureCapacity(2);
+        assertTrue(sb.capacity() >= 2);
+
+        sb.ensureCapacity(-1);
+        assertTrue(sb.capacity() >= 0);
+
+        sb.append("HelloWorld");
+        sb.ensureCapacity(40);
+        assertTrue(sb.capacity() >= 40);
+    }
+
+    @Test
+    public void testMinimizeCapacity() {
+        final TextStringBuilder sb = new TextStringBuilder();
+        sb.minimizeCapacity();
+        assertEquals(0, sb.capacity());
+
+        sb.append("HelloWorld");
+        sb.minimizeCapacity();
+        assertEquals(10, sb.capacity());
+    }
+
+    // -----------------------------------------------------------------------
+    @Test
+    public void testSize() {
+        final TextStringBuilder sb = new TextStringBuilder();
+        assertEquals(0, sb.size());
+
+        sb.append("Hello");
+        assertEquals(5, sb.size());
+    }
+
+    @Test
+    public void testIsEmpty() {
+        final TextStringBuilder sb = new TextStringBuilder();
+        assertTrue(sb.isEmpty());
+
+        sb.append("Hello");
+        assertFalse(sb.isEmpty());
+
+        sb.clear();
+        assertTrue(sb.isEmpty());
+    }
+
+    @Test
+    public void testClear() {
+        final TextStringBuilder sb = new TextStringBuilder();
+        sb.append("Hello");
+        sb.clear();
+        assertEquals(0, sb.length());
+        assertTrue(sb.buffer.length >= 5);
+    }
+
+    // -----------------------------------------------------------------------
+    @Test
+    public void testCharAt() {
+        final TextStringBuilder sb = new TextStringBuilder();
+        try {
+            sb.charAt(0);
+            fail("charAt(0) expected IndexOutOfBoundsException");
+        } catch (final IndexOutOfBoundsException e) {
+            // expected
+        }
+        try {
+            sb.charAt(-1);
+            fail("charAt(-1) expected IndexOutOfBoundsException");
+        } catch (final IndexOutOfBoundsException e) {
+            // expected
+        }
+        sb.append("foo");
+        assertEquals('f', sb.charAt(0));
+        assertEquals('o', sb.charAt(1));
+        assertEquals('o', sb.charAt(2));
+        try {
+            sb.charAt(-1);
+            fail("charAt(-1) expected IndexOutOfBoundsException");
+        } catch (final IndexOutOfBoundsException e) {
+            // expected
+        }
+        try {
+            sb.charAt(3);
+            fail("charAt(3) expected IndexOutOfBoundsException");
+        } catch (final IndexOutOfBoundsException e) {
+            // expected
+        }
+    }
+
+    // -----------------------------------------------------------------------
+    @Test
+    public void testSetCharAt() {
+        final TextStringBuilder sb = new TextStringBuilder();
+        try {
+            sb.setCharAt(0, 'f');
+            fail("setCharAt(0,) expected IndexOutOfBoundsException");
+        } catch (final IndexOutOfBoundsException e) {
+            // expected
+        }
+        try {
+            sb.setCharAt(-1, 'f');
+            fail("setCharAt(-1,) expected IndexOutOfBoundsException");
+        } catch (final IndexOutOfBoundsException e) {
+            // expected
+        }
+        sb.append("foo");
+        sb.setCharAt(0, 'b');
+        sb.setCharAt(1, 'a');
+        sb.setCharAt(2, 'r');
+        try {
+            sb.setCharAt(3, '!');
+            fail("setCharAt(3,) expected IndexOutOfBoundsException");
+        } catch (final IndexOutOfBoundsException e) {
+            // expected
+        }
+        assertEquals("bar", sb.toString());
+    }
+
+    // -----------------------------------------------------------------------
+    @Test
+    public void testDeleteCharAt() {
+        final TextStringBuilder sb = new TextStringBuilder("abc");
+        sb.deleteCharAt(0);
+        assertEquals("bc", sb.toString());
+
+        try {
+            sb.deleteCharAt(1000);
+            fail("Expected IndexOutOfBoundsException");
+        } catch (final IndexOutOfBoundsException e) {
+        }
+    }
+
+    // -----------------------------------------------------------------------
+    @Test
+    public void testToCharArray() {
+        final TextStringBuilder sb = new TextStringBuilder();
+        assertEquals(0, sb.toCharArray().length);
+
+        char[] a = sb.toCharArray();
+        assertNotNull("toCharArray() result is null", a);
+        assertEquals("toCharArray() result is too large", 0, a.length);
+
+        sb.append("junit");
+        a = sb.toCharArray();
+        assertEquals("toCharArray() result incorrect length", 5, a.length);
+        assertTrue("toCharArray() result does not match", 
Arrays.equals("junit".toCharArray(), a));
+    }
+
+    @Test
+    public void testToCharArrayIntInt() {
+        final TextStringBuilder sb = new TextStringBuilder();
+        assertEquals(0, sb.toCharArray(0, 0).length);
+
+        sb.append("junit");
+        char[] a = sb.toCharArray(0, 20); // too large test
+        assertEquals("toCharArray(int,int) result incorrect length", 5, 
a.length);
+        assertTrue("toCharArray(int,int) result does not match", 
Arrays.equals("junit".toCharArray(), a));
+
+        a = sb.toCharArray(0, 4);
+        assertEquals("toCharArray(int,int) result incorrect length", 4, 
a.length);
+        assertTrue("toCharArray(int,int) result does not match", 
Arrays.equals("juni".toCharArray(), a));
+
+        a = sb.toCharArray(0, 4);
+        assertEquals("toCharArray(int,int) result incorrect length", 4, 
a.length);
+        assertTrue("toCharArray(int,int) result does not match", 
Arrays.equals("juni".toCharArray(), a));
+
+        a = sb.toCharArray(0, 1);
+        assertNotNull("toCharArray(int,int) result is null", a);
+
+        try {
+            sb.toCharArray(-1, 5);
+            fail("no string index out of bound on -1");
+        } catch (final IndexOutOfBoundsException e) {
+        }
+
+        try {
+            sb.toCharArray(6, 5);
+            fail("no string index out of bound on -1");
+        } catch (final IndexOutOfBoundsException e) {
+        }
+    }
+
+    @Test
+    public void testGetChars() {
+        final TextStringBuilder sb = new TextStringBuilder();
+
+        char[] input = new char[10];
+        char[] a = sb.getChars(input);
+        assertSame(input, a);
+        assertTrue(Arrays.equals(new char[10], a));
+
+        sb.append("junit");
+        a = sb.getChars(input);
+        assertSame(input, a);
+        assertTrue(Arrays.equals(new char[] { 'j', 'u', 'n', 'i', 't', 0, 0, 
0, 0, 0 }, a));
+
+        a = sb.getChars(null);
+        assertNotSame(input, a);
+        assertEquals(5, a.length);
+        assertTrue(Arrays.equals("junit".toCharArray(), a));
+
+        input = new char[5];
+        a = sb.getChars(input);
+        assertSame(input, a);
+
+        input = new char[4];
+        a = sb.getChars(input);
+        assertNotSame(input, a);
+    }
+
+    @Test
+    public void testGetCharsIntIntCharArrayInt() {
+        final TextStringBuilder sb = new TextStringBuilder();
+
+        sb.append("junit");
+        char[] a = new char[5];
+        sb.getChars(0, 5, a, 0);
+        assertTrue(Arrays.equals(new char[] { 'j', 'u', 'n', 'i', 't' }, a));
+
+        a = new char[5];
+        sb.getChars(0, 2, a, 3);
+        assertTrue(Arrays.equals(new char[] { 0, 0, 0, 'j', 'u' }, a));
+
+        try {
+            sb.getChars(-1, 0, a, 0);
+            fail("no exception");
+        } catch (final IndexOutOfBoundsException e) {
+        }
+
+        try {
+            sb.getChars(0, -1, a, 0);
+            fail("no exception");
+        } catch (final IndexOutOfBoundsException e) {
+        }
+
+        try {
+            sb.getChars(0, 20, a, 0);
+            fail("no exception");
+        } catch (final IndexOutOfBoundsException e) {
+        }
+
+        try {
+            sb.getChars(4, 2, a, 0);
+            fail("no exception");
+        } catch (final IndexOutOfBoundsException e) {
+        }
+    }
+
+    // -----------------------------------------------------------------------
+    @Test
+    public void testDeleteIntInt() {
+        TextStringBuilder sb = new TextStringBuilder("abc");
+        sb.delete(0, 1);
+        assertEquals("bc", sb.toString());
+        sb.delete(1, 2);
+        assertEquals("b", sb.toString());
+        sb.delete(0, 1);
+        assertEquals("", sb.toString());
+        sb.delete(0, 1000);
+        assertEquals("", sb.toString());
+
+        try {
+            sb.delete(1, 2);
+            fail("Expected IndexOutOfBoundsException");
+        } catch (final IndexOutOfBoundsException e) {
+        }
+        try {
+            sb.delete(-1, 1);
+            fail("Expected IndexOutOfBoundsException");
+        } catch (final IndexOutOfBoundsException e) {
+        }
+
+        sb = new TextStringBuilder("anything");
+        try {
+            sb.delete(2, 1);
+            fail("Expected IndexOutOfBoundsException");
+        } catch (final IndexOutOfBoundsException e) {
+        }
+    }
+
+    // -----------------------------------------------------------------------
+    @Test
+    public void testDeleteAll_char() {
+        TextStringBuilder sb = new TextStringBuilder("abcbccba");
+        sb.deleteAll('X');
+        assertEquals("abcbccba", sb.toString());
+        sb.deleteAll('a');
+        assertEquals("bcbccb", sb.toString());
+        sb.deleteAll('c');
+        assertEquals("bbb", sb.toString());
+        sb.deleteAll('b');
+        assertEquals("", sb.toString());
+
+        sb = new TextStringBuilder("");
+        sb.deleteAll('b');
+        assertEquals("", sb.toString());
+    }
+
+    @Test
+    public void testDeleteFirst_char() {
+        TextStringBuilder sb = new TextStringBuilder("abcba");
+        sb.deleteFirst('X');
+        assertEquals("abcba", sb.toString());
+        sb.deleteFirst('a');
+        assertEquals("bcba", sb.toString());
+        sb.deleteFirst('c');
+        assertEquals("bba", sb.toString());
+        sb.deleteFirst('b');
+        assertEquals("ba", sb.toString());
+
+        sb = new TextStringBuilder("");
+        sb.deleteFirst('b');
+        assertEquals("", sb.toString());
+    }
+
+    // -----------------------------------------------------------------------
+    @Test
+    public void testDeleteAll_String() {
+        TextStringBuilder sb = new TextStringBuilder("abcbccba");
+        sb.deleteAll((String) null);
+        assertEquals("abcbccba", sb.toString());
+        sb.deleteAll("");
+        assertEquals("abcbccba", sb.toString());
+
+        sb.deleteAll("X");
+        assertEquals("abcbccba", sb.toString());
+        sb.deleteAll("a");
+        assertEquals("bcbccb", sb.toString());
+        sb.deleteAll("c");
+        assertEquals("bbb", sb.toString());
+        sb.deleteAll("b");
+        assertEquals("", sb.toString());
+
+        sb = new TextStringBuilder("abcbccba");
+        sb.deleteAll("bc");
+        assertEquals("acba", sb.toString());
+
+        sb = new TextStringBuilder("");
+        sb.deleteAll("bc");
+        assertEquals("", sb.toString());
+    }
+
+    @Test
+    public void testDeleteFirst_String() {
+        TextStringBuilder sb = new TextStringBuilder("abcbccba");
+        sb.deleteFirst((String) null);
+        assertEquals("abcbccba", sb.toString());
+        sb.deleteFirst("");
+        assertEquals("abcbccba", sb.toString());
+
+        sb.deleteFirst("X");
+        assertEquals("abcbccba", sb.toString());
+        sb.deleteFirst("a");
+        assertEquals("bcbccba", sb.toString());
+        sb.deleteFirst("c");
+        assertEquals("bbccba", sb.toString());
+        sb.deleteFirst("b");
+        assertEquals("bccba", sb.toString());
+
+        sb = new TextStringBuilder("abcbccba");
+        sb.deleteFirst("bc");
+        assertEquals("abccba", sb.toString());
+
+        sb = new TextStringBuilder("");
+        sb.deleteFirst("bc");
+        assertEquals("", sb.toString());
+    }
+
+    // -----------------------------------------------------------------------
+    @Test
+    public void testDeleteAll_StringMatcher() {
+        TextStringBuilder sb = new TextStringBuilder("A0xA1A2yA3");
+        sb.deleteAll((StringMatcher) null);
+        assertEquals("A0xA1A2yA3", sb.toString());
+        sb.deleteAll(A_NUMBER_MATCHER);
+        assertEquals("xy", sb.toString());
+
+        sb = new TextStringBuilder("Ax1");
+        sb.deleteAll(A_NUMBER_MATCHER);
+        assertEquals("Ax1", sb.toString());
+
+        sb = new TextStringBuilder("");
+        sb.deleteAll(A_NUMBER_MATCHER);
+        assertEquals("", sb.toString());
+    }
+
+    @Test
+    public void testDeleteFirst_StringMatcher() {
+        TextStringBuilder sb = new TextStringBuilder("A0xA1A2yA3");
+        sb.deleteFirst((StringMatcher) null);
+        assertEquals("A0xA1A2yA3", sb.toString());
+        sb.deleteFirst(A_NUMBER_MATCHER);
+        assertEquals("xA1A2yA3", sb.toString());
+
+        sb = new TextStringBuilder("Ax1");
+        sb.deleteFirst(A_NUMBER_MATCHER);
+        assertEquals("Ax1", sb.toString());
+
+        sb = new TextStringBuilder("");
+        sb.deleteFirst(A_NUMBER_MATCHER);
+        assertEquals("", sb.toString());
+    }
+
+    // -----------------------------------------------------------------------
+    @Test
+    public void testReplace_int_int_String() {
+        TextStringBuilder sb = new TextStringBuilder("abc");
+        sb.replace(0, 1, "d");
+        assertEquals("dbc", sb.toString());
+        sb.replace(0, 1, "aaa");
+        assertEquals("aaabc", sb.toString());
+        sb.replace(0, 3, "");
+        assertEquals("bc", sb.toString());
+        sb.replace(1, 2, (String) null);
+        assertEquals("b", sb.toString());
+        sb.replace(1, 1000, "text");
+        assertEquals("btext", sb.toString());
+        sb.replace(0, 1000, "text");
+        assertEquals("text", sb.toString());
+
+        sb = new TextStringBuilder("atext");
+        sb.replace(1, 1, "ny");
+        assertEquals("anytext", sb.toString());
+        try {
+            sb.replace(2, 1, "anything");
+            fail("Expected IndexOutOfBoundsException");
+        } catch (final IndexOutOfBoundsException e) {
+        }
+
+        sb = new TextStringBuilder();
+        try {
+            sb.replace(1, 2, "anything");
+            fail("Expected IndexOutOfBoundsException");
+        } catch (final IndexOutOfBoundsException e) {
+        }
+        try {
+            sb.replace(-1, 1, "anything");
+            fail("Expected IndexOutOfBoundsException");
+        } catch (final IndexOutOfBoundsException e) {
+        }
+    }
+
+    // -----------------------------------------------------------------------
+    @Test
+    public void testReplaceAll_char_char() {
+        final TextStringBuilder sb = new TextStringBuilder("abcbccba");
+        sb.replaceAll('x', 'y');
+        assertEquals("abcbccba", sb.toString());
+        sb.replaceAll('a', 'd');
+        assertEquals("dbcbccbd", sb.toString());
+        sb.replaceAll('b', 'e');
+        assertEquals("dececced", sb.toString());
+        sb.replaceAll('c', 'f');
+        assertEquals("defeffed", sb.toString());
+        sb.replaceAll('d', 'd');
+        assertEquals("defeffed", sb.toString());
+    }
+
+    // -----------------------------------------------------------------------
+    @Test
+    public void testReplaceFirst_char_char() {
+        final TextStringBuilder sb = new TextStringBuilder("abcbccba");
+        sb.replaceFirst('x', 'y');
+        assertEquals("abcbccba", sb.toString());
+        sb.replaceFirst('a', 'd');
+        assertEquals("dbcbccba", sb.toString());
+        sb.replaceFirst('b', 'e');
+        assertEquals("decbccba", sb.toString());
+        sb.replaceFirst('c', 'f');
+        assertEquals("defbccba", sb.toString());
+        sb.replaceFirst('d', 'd');
+        assertEquals("defbccba", sb.toString());
+    }
+
+    // -----------------------------------------------------------------------
+    @Test
+    public void testReplaceAll_String_String() {
+        TextStringBuilder sb = new TextStringBuilder("abcbccba");
+        sb.replaceAll((String) null, null);
+        assertEquals("abcbccba", sb.toString());
+        sb.replaceAll((String) null, "anything");
+        assertEquals("abcbccba", sb.toString());
+        sb.replaceAll("", null);
+        assertEquals("abcbccba", sb.toString());
+        sb.replaceAll("", "anything");
+        assertEquals("abcbccba", sb.toString());
+
+        sb.replaceAll("x", "y");
+        assertEquals("abcbccba", sb.toString());
+        sb.replaceAll("a", "d");
+        assertEquals("dbcbccbd", sb.toString());
+        sb.replaceAll("d", null);
+        assertEquals("bcbccb", sb.toString());
+        sb.replaceAll("cb", "-");
+        assertEquals("b-c-", sb.toString());
+
+        sb = new TextStringBuilder("abcba");
+        sb.replaceAll("b", "xbx");
+        assertEquals("axbxcxbxa", sb.toString());
+
+        sb = new TextStringBuilder("bb");
+        sb.replaceAll("b", "xbx");
+        assertEquals("xbxxbx", sb.toString());
+    }
+
+    @Test
+    public void testReplaceFirst_String_String() {
+        TextStringBuilder sb = new TextStringBuilder("abcbccba");
+        sb.replaceFirst((String) null, null);
+        assertEquals("abcbccba", sb.toString());
+        sb.replaceFirst((String) null, "anything");
+        assertEquals("abcbccba", sb.toString());
+        sb.replaceFirst("", null);
+        assertEquals("abcbccba", sb.toString());
+        sb.replaceFirst("", "anything");
+        assertEquals("abcbccba", sb.toString());
+
+        sb.replaceFirst("x", "y");
+        assertEquals("abcbccba", sb.toString());
+        sb.replaceFirst("a", "d");
+        assertEquals("dbcbccba", sb.toString());
+        sb.replaceFirst("d", null);
+        assertEquals("bcbccba", sb.toString());
+        sb.replaceFirst("cb", "-");
+        assertEquals("b-ccba", sb.toString());
+
+        sb = new TextStringBuilder("abcba");
+        sb.replaceFirst("b", "xbx");
+        assertEquals("axbxcba", sb.toString());
+
+        sb = new TextStringBuilder("bb");
+        sb.replaceFirst("b", "xbx");
+        assertEquals("xbxb", sb.toString());
+    }
+
+    // -----------------------------------------------------------------------
+    @Test
+    public void testReplaceAll_StringMatcher_String() {
+        TextStringBuilder sb = new TextStringBuilder("abcbccba");
+        sb.replaceAll((StringMatcher) null, null);
+        assertEquals("abcbccba", sb.toString());
+        sb.replaceAll((StringMatcher) null, "anything");
+        assertEquals("abcbccba", sb.toString());
+        sb.replaceAll(StringMatcherFactory.INSTANCE.noneMatcher(), null);
+        assertEquals("abcbccba", sb.toString());
+        sb.replaceAll(StringMatcherFactory.INSTANCE.noneMatcher(), "anything");
+        assertEquals("abcbccba", sb.toString());
+
+        sb.replaceAll(StringMatcherFactory.INSTANCE.charMatcher('x'), "y");
+        assertEquals("abcbccba", sb.toString());
+        sb.replaceAll(StringMatcherFactory.INSTANCE.charMatcher('a'), "d");
+        assertEquals("dbcbccbd", sb.toString());
+        sb.replaceAll(StringMatcherFactory.INSTANCE.charMatcher('d'), null);
+        assertEquals("bcbccb", sb.toString());
+        sb.replaceAll(StringMatcherFactory.INSTANCE.stringMatcher("cb"), "-");
+        assertEquals("b-c-", sb.toString());
+
+        sb = new TextStringBuilder("abcba");
+        sb.replaceAll(StringMatcherFactory.INSTANCE.charMatcher('b'), "xbx");
+        assertEquals("axbxcxbxa", sb.toString());
+
+        sb = new TextStringBuilder("bb");
+        sb.replaceAll(StringMatcherFactory.INSTANCE.charMatcher('b'), "xbx");
+        assertEquals("xbxxbx", sb.toString());
+
+        sb = new TextStringBuilder("A1-A2A3-A4");
+        sb.replaceAll(A_NUMBER_MATCHER, "***");
+        assertEquals("***-******-***", sb.toString());
+
+        sb = new TextStringBuilder("Dear X, hello X.");
+        sb.replaceAll(StringMatcherFactory.INSTANCE.stringMatcher("X"), 
"012345678901234567");
+        assertEquals("Dear 012345678901234567, hello 012345678901234567.", 
sb.toString());
+    }
+
+    @Test
+    public void testReplaceFirst_StringMatcher_String() {
+        TextStringBuilder sb = new TextStringBuilder("abcbccba");
+        sb.replaceFirst((StringMatcher) null, null);
+        assertEquals("abcbccba", sb.toString());
+        sb.replaceFirst((StringMatcher) null, "anything");
+        assertEquals("abcbccba", sb.toString());
+        sb.replaceFirst(StringMatcherFactory.INSTANCE.noneMatcher(), null);
+        assertEquals("abcbccba", sb.toString());
+        sb.replaceFirst(StringMatcherFactory.INSTANCE.noneMatcher(), 
"anything");
+        assertEquals("abcbccba", sb.toString());
+
+        sb.replaceFirst(StringMatcherFactory.INSTANCE.charMatcher('x'), "y");
+        assertEquals("abcbccba", sb.toString());
+        sb.replaceFirst(StringMatcherFactory.INSTANCE.charMatcher('a'), "d");
+        assertEquals("dbcbccba", sb.toString());
+        sb.replaceFirst(StringMatcherFactory.INSTANCE.charMatcher('d'), null);
+        assertEquals("bcbccba", sb.toString());
+        sb.replaceFirst(StringMatcherFactory.INSTANCE.stringMatcher("cb"), 
"-");
+        assertEquals("b-ccba", sb.toString());
+
+        sb = new TextStringBuilder("abcba");
+        sb.replaceFirst(StringMatcherFactory.INSTANCE.charMatcher('b'), "xbx");
+        assertEquals("axbxcba", sb.toString());
+
+        sb = new TextStringBuilder("bb");
+        sb.replaceFirst(StringMatcherFactory.INSTANCE.charMatcher('b'), "xbx");
+        assertEquals("xbxb", sb.toString());
+
+        sb = new TextStringBuilder("A1-A2A3-A4");
+        sb.replaceFirst(A_NUMBER_MATCHER, "***");
+        assertEquals("***-A2A3-A4", sb.toString());
+    }
+
+    // -----------------------------------------------------------------------
+    @Test
+    public void testReplace_StringMatcher_String_int_int_int_VaryMatcher() {
+        TextStringBuilder sb = new TextStringBuilder("abcbccba");
+        sb.replace((StringMatcher) null, "x", 0, sb.length(), -1);
+        assertEquals("abcbccba", sb.toString());
+
+        sb.replace(StringMatcherFactory.INSTANCE.charMatcher('a'), "x", 0, 
sb.length(), -1);
+        assertEquals("xbcbccbx", sb.toString());
+
+        sb.replace(StringMatcherFactory.INSTANCE.stringMatcher("cb"), "x", 0, 
sb.length(), -1);
+        assertEquals("xbxcxx", sb.toString());
+
+        sb = new TextStringBuilder("A1-A2A3-A4");
+        sb.replace(A_NUMBER_MATCHER, "***", 0, sb.length(), -1);
+        assertEquals("***-******-***", sb.toString());
+
+        sb = new TextStringBuilder();
+        sb.replace(A_NUMBER_MATCHER, "***", 0, sb.length(), -1);
+        assertEquals("", sb.toString());
+    }
+
+    @Test
+    public void testReplace_StringMatcher_String_int_int_int_VaryReplace() {
+        TextStringBuilder sb = new TextStringBuilder("abcbccba");
+        sb.replace(StringMatcherFactory.INSTANCE.stringMatcher("cb"), "cb", 0, 
sb.length(), -1);
+        assertEquals("abcbccba", sb.toString());
+
+        sb = new TextStringBuilder("abcbccba");
+        sb.replace(StringMatcherFactory.INSTANCE.stringMatcher("cb"), "-", 0, 
sb.length(), -1);
+        assertEquals("ab-c-a", sb.toString());
+
+        sb = new TextStringBuilder("abcbccba");
+        sb.replace(StringMatcherFactory.INSTANCE.stringMatcher("cb"), "+++", 
0, sb.length(), -1);
+        assertEquals("ab+++c+++a", sb.toString());
+
+        sb = new TextStringBuilder("abcbccba");
+        sb.replace(StringMatcherFactory.INSTANCE.stringMatcher("cb"), "", 0, 
sb.length(), -1);
+        assertEquals("abca", sb.toString());
+
+        sb = new TextStringBuilder("abcbccba");
+        sb.replace(StringMatcherFactory.INSTANCE.stringMatcher("cb"), null, 0, 
sb.length(), -1);
+        assertEquals("abca", sb.toString());
+    }
+
+    @Test
+    public void testReplace_StringMatcher_String_int_int_int_VaryStartIndex() {
+        TextStringBuilder sb = new TextStringBuilder("aaxaaaayaa");
+        sb.replace(StringMatcherFactory.INSTANCE.stringMatcher("aa"), "-", 0, 
sb.length(), -1);
+        assertEquals("-x--y-", sb.toString());
+
+        sb = new TextStringBuilder("aaxaaaayaa");
+        sb.replace(StringMatcherFactory.INSTANCE.stringMatcher("aa"), "-", 1, 
sb.length(), -1);
+        assertEquals("aax--y-", sb.toString());
+
+        sb = new TextStringBuilder("aaxaaaayaa");
+        sb.replace(StringMatcherFactory.INSTANCE.stringMatcher("aa"), "-", 2, 
sb.length(), -1);
+        assertEquals("aax--y-", sb.toString());
+
+        sb = new TextStringBuilder("aaxaaaayaa");
+        sb.replace(StringMatcherFactory.INSTANCE.stringMatcher("aa"), "-", 3, 
sb.length(), -1);
+        assertEquals("aax--y-", sb.toString());
+
+        sb = new TextStringBuilder("aaxaaaayaa");
+        sb.replace(StringMatcherFactory.INSTANCE.stringMatcher("aa"), "-", 4, 
sb.length(), -1);
+        assertEquals("aaxa-ay-", sb.toString());
+
+        sb = new TextStringBuilder("aaxaaaayaa");
+        sb.replace(StringMatcherFactory.INSTANCE.stringMatcher("aa"), "-", 5, 
sb.length(), -1);
+        assertEquals("aaxaa-y-", sb.toString());
+
+        sb = new TextStringBuilder("aaxaaaayaa");
+        sb.replace(StringMatcherFactory.INSTANCE.stringMatcher("aa"), "-", 6, 
sb.length(), -1);
+        assertEquals("aaxaaaay-", sb.toString());
+
+        sb = new TextStringBuilder("aaxaaaayaa");
+        sb.replace(StringMatcherFactory.INSTANCE.stringMatcher("aa"), "-", 7, 
sb.length(), -1);
+        assertEquals("aaxaaaay-", sb.toString());
+
+        sb = new TextStringBuilder("aaxaaaayaa");
+        sb.replace(StringMatcherFactory.INSTANCE.stringMatcher("aa"), "-", 8, 
sb.length(), -1);
+        assertEquals("aaxaaaay-", sb.toString());
+
+        sb = new TextStringBuilder("aaxaaaayaa");
+        sb.replace(StringMatcherFactory.INSTANCE.stringMatcher("aa"), "-", 9, 
sb.length(), -1);
+        assertEquals("aaxaaaayaa", sb.toString());
+
+        sb = new TextStringBuilder("aaxaaaayaa");
+        sb.replace(StringMatcherFactory.INSTANCE.stringMatcher("aa"), "-", 10, 
sb.length(), -1);
+        assertEquals("aaxaaaayaa", sb.toString());
+
+        sb = new TextStringBuilder("aaxaaaayaa");
+        try {
+            sb.replace(StringMatcherFactory.INSTANCE.stringMatcher("aa"), "-", 
11, sb.length(), -1);
+            fail();
+        } catch (final IndexOutOfBoundsException ex) {
+        }
+        assertEquals("aaxaaaayaa", sb.toString());
+
+        sb = new TextStringBuilder("aaxaaaayaa");
+        try {
+            sb.replace(StringMatcherFactory.INSTANCE.stringMatcher("aa"), "-", 
-1, sb.length(), -1);
+            fail();
+        } catch (final IndexOutOfBoundsException ex) {
+        }
+        assertEquals("aaxaaaayaa", sb.toString());
+    }
+
+    @Test
+    public void testReplace_StringMatcher_String_int_int_int_VaryEndIndex() {
+        TextStringBuilder sb = new TextStringBuilder("aaxaaaayaa");
+        sb.replace(StringMatcherFactory.INSTANCE.stringMatcher("aa"), "-", 0, 
0, -1);
+        assertEquals("aaxaaaayaa", sb.toString());
+
+        sb = new TextStringBuilder("aaxaaaayaa");
+        sb.replace(StringMatcherFactory.INSTANCE.stringMatcher("aa"), "-", 0, 
2, -1);
+        assertEquals("-xaaaayaa", sb.toString());
+
+        sb = new TextStringBuilder("aaxaaaayaa");
+        sb.replace(StringMatcherFactory.INSTANCE.stringMatcher("aa"), "-", 0, 
3, -1);
+        assertEquals("-xaaaayaa", sb.toString());
+
+        sb = new TextStringBuilder("aaxaaaayaa");
+        sb.replace(StringMatcherFactory.INSTANCE.stringMatcher("aa"), "-", 0, 
4, -1);
+        assertEquals("-xaaaayaa", sb.toString());
+
+        sb = new TextStringBuilder("aaxaaaayaa");
+        sb.replace(StringMatcherFactory.INSTANCE.stringMatcher("aa"), "-", 0, 
5, -1);
+        assertEquals("-x-aayaa", sb.toString());
+
+        sb = new TextStringBuilder("aaxaaaayaa");
+        sb.replace(StringMatcherFactory.INSTANCE.stringMatcher("aa"), "-", 0, 
6, -1);
+        assertEquals("-x-aayaa", sb.toString());
+
+        sb = new TextStringBuilder("aaxaaaayaa");
+        sb.replace(StringMatcherFactory.INSTANCE.stringMatcher("aa"), "-", 0, 
7, -1);
+        assertEquals("-x--yaa", sb.toString());
+
+        sb = new TextStringBuilder("aaxaaaayaa");
+        sb.replace(StringMatcherFactory.INSTANCE.stringMatcher("aa"), "-", 0, 
8, -1);
+        assertEquals("-x--yaa", sb.toString());
+
+        sb = new TextStringBuilder("aaxaaaayaa");
+        sb.replace(StringMatcherFactory.INSTANCE.stringMatcher("aa"), "-", 0, 
9, -1);
+        assertEquals("-x--yaa", sb.toString());
+
+        sb = new TextStringBuilder("aaxaaaayaa");
+        sb.replace(StringMatcherFactory.INSTANCE.stringMatcher("aa"), "-", 0, 
10, -1);
+        assertEquals("-x--y-", sb.toString());
+
+        sb = new TextStringBuilder("aaxaaaayaa");
+        sb.replace(StringMatcherFactory.INSTANCE.stringMatcher("aa"), "-", 0, 
1000, -1);
+        assertEquals("-x--y-", sb.toString());
+
+        sb = new TextStringBuilder("aaxaaaayaa");
+        try {
+            sb.replace(StringMatcherFactory.INSTANCE.stringMatcher("aa"), "-", 
2, 1, -1);
+            fail();
+        } catch (final IndexOutOfBoundsException ex) {
+        }
+        assertEquals("aaxaaaayaa", sb.toString());
+    }
+
+    @Test
+    public void testReplace_StringMatcher_String_int_int_int_VaryCount() {
+        TextStringBuilder sb = new TextStringBuilder("aaxaaaayaa");
+        sb.replace(StringMatcherFactory.INSTANCE.stringMatcher("aa"), "-", 0, 
10, -1);
+        assertEquals("-x--y-", sb.toString());
+
+        sb = new TextStringBuilder("aaxaaaayaa");
+        sb.replace(StringMatcherFactory.INSTANCE.stringMatcher("aa"), "-", 0, 
10, 0);
+        assertEquals("aaxaaaayaa", sb.toString());
+
+        sb = new TextStringBuilder("aaxaaaayaa");
+        sb.replace(StringMatcherFactory.INSTANCE.stringMatcher("aa"), "-", 0, 
10, 1);
+        assertEquals("-xaaaayaa", sb.toString());
+
+        sb = new TextStringBuilder("aaxaaaayaa");
+        sb.replace(StringMatcherFactory.INSTANCE.stringMatcher("aa"), "-", 0, 
10, 2);
+        assertEquals("-x-aayaa", sb.toString());
+
+        sb = new TextStringBuilder("aaxaaaayaa");
+        sb.replace(StringMatcherFactory.INSTANCE.stringMatcher("aa"), "-", 0, 
10, 3);
+        assertEquals("-x--yaa", sb.toString());
+
+        sb = new TextStringBuilder("aaxaaaayaa");
+        sb.replace(StringMatcherFactory.INSTANCE.stringMatcher("aa"), "-", 0, 
10, 4);
+        assertEquals("-x--y-", sb.toString());
+
+        sb = new TextStringBuilder("aaxaaaayaa");
+        sb.replace(StringMatcherFactory.INSTANCE.stringMatcher("aa"), "-", 0, 
10, 5);
+        assertEquals("-x--y-", sb.toString());
+    }
+
+    // -----------------------------------------------------------------------
+    @Test
+    public void testReverse() {
+        final TextStringBuilder sb = new TextStringBuilder();
+        assertEquals("", sb.reverse().toString());
+
+        sb.clear().append(true);
+        assertEquals("eurt", sb.reverse().toString());
+        assertEquals("true", sb.reverse().toString());
+    }
+
+    // -----------------------------------------------------------------------
+    @Test
+    public void testTrim() {
+        final TextStringBuilder sb = new TextStringBuilder();
+        assertEquals("", sb.reverse().toString());
+
+        sb.clear().append(" \u0000 ");
+        assertEquals("", sb.trim().toString());
+
+        sb.clear().append(" \u0000 a b c");
+        assertEquals("a b c", sb.trim().toString());
+
+        sb.clear().append("a b c \u0000 ");
+        assertEquals("a b c", sb.trim().toString());
+
+        sb.clear().append(" \u0000 a b c \u0000 ");
+        assertEquals("a b c", sb.trim().toString());
+
+        sb.clear().append("a b c");
+        assertEquals("a b c", sb.trim().toString());
+    }
+
+    // -----------------------------------------------------------------------
+    @Test
+    public void testStartsWith() {
+        final TextStringBuilder sb = new TextStringBuilder();
+        assertFalse(sb.startsWith("a"));
+        assertFalse(sb.startsWith(null));
+        assertTrue(sb.startsWith(""));
+        sb.append("abc");
+        assertTrue(sb.startsWith("a"));
+        assertTrue(sb.startsWith("ab"));
+        assertTrue(sb.startsWith("abc"));
+        assertFalse(sb.startsWith("cba"));
+    }
+
+    @Test
+    public void testEndsWith() {
+        final TextStringBuilder sb = new TextStringBuilder();
+        assertFalse(sb.endsWith("a"));
+        assertFalse(sb.endsWith("c"));
+        assertTrue(sb.endsWith(""));
+        assertFalse(sb.endsWith(null));
+        sb.append("abc");
+        assertTrue(sb.endsWith("c"));
+        assertTrue(sb.endsWith("bc"));
+        assertTrue(sb.endsWith("abc"));
+        assertFalse(sb.endsWith("cba"));
+        assertFalse(sb.endsWith("abcd"));
+        assertFalse(sb.endsWith(" abc"));
+        assertFalse(sb.endsWith("abc "));
+    }
+
+    // -----------------------------------------------------------------------
+    @Test
+    public void testSubSequenceIntInt() {
+        final TextStringBuilder sb = new TextStringBuilder("hello goodbye");
+        // Start index is negative
+        try {
+            sb.subSequence(-1, 5);
+            fail();
+        } catch (final IndexOutOfBoundsException e) {
+        }
+
+        // End index is negative
+        try {
+            sb.subSequence(2, -1);
+            fail();
+        } catch (final IndexOutOfBoundsException e) {
+        }
+
+        // End index greater than length()
+        try {
+            sb.subSequence(2, sb.length() + 1);
+            fail();
+        } catch (final IndexOutOfBoundsException e) {
+        }
+
+        // Start index greater then end index
+        try {
+            sb.subSequence(3, 2);
+            fail();
+        } catch (final IndexOutOfBoundsException e) {
+        }
+
+        // Normal cases
+        assertEquals("hello", sb.subSequence(0, 5));
+        assertEquals("hello goodbye".subSequence(0, 6), sb.subSequence(0, 6));
+        assertEquals("goodbye", sb.subSequence(6, 13));
+        assertEquals("hello goodbye".subSequence(6, 13), sb.subSequence(6, 
13));
+    }
+
+    @Test
+    public void testSubstringInt() {
+        final TextStringBuilder sb = new TextStringBuilder("hello goodbye");
+        assertEquals("goodbye", sb.substring(6));
+        assertEquals("hello goodbye".substring(6), sb.substring(6));
+        assertEquals("hello goodbye", sb.substring(0));
+        assertEquals("hello goodbye".substring(0), sb.substring(0));
+        try {
+            sb.substring(-1);
+            fail();
+        } catch (final IndexOutOfBoundsException e) {
+        }
+
+        try {
+            sb.substring(15);
+            fail();
+        } catch (final IndexOutOfBoundsException e) {
+        }
+
+    }
+
+    @Test
+    public void testSubstringIntInt() {
+        final TextStringBuilder sb = new TextStringBuilder("hello goodbye");
+        assertEquals("hello", sb.substring(0, 5));
+        assertEquals("hello goodbye".substring(0, 6), sb.substring(0, 6));
+
+        assertEquals("goodbye", sb.substring(6, 13));
+        assertEquals("hello goodbye".substring(6, 13), sb.substring(6, 13));
+
+        assertEquals("goodbye", sb.substring(6, 20));
+
+        try {
+            sb.substring(-1, 5);
+            fail();
+        } catch (final IndexOutOfBoundsException e) {
+        }
+
+        try {
+            sb.substring(15, 20);
+            fail();
+        } catch (final IndexOutOfBoundsException e) {
+        }
+    }
+
+    // -----------------------------------------------------------------------
+    @Test
+    public void testMidString() {
+        final TextStringBuilder sb = new TextStringBuilder("hello goodbye 
hello");
+        assertEquals("goodbye", sb.midString(6, 7));
+        assertEquals("hello", sb.midString(0, 5));
+        assertEquals("hello", sb.midString(-5, 5));
+        assertEquals("", sb.midString(0, -1));
+        assertEquals("", sb.midString(20, 2));
+        assertEquals("hello", sb.midString(14, 22));
+    }
+
+    @Test
+    public void testRightString() {
+        final TextStringBuilder sb = new TextStringBuilder("left right");
+        assertEquals("right", sb.rightString(5));
+        assertEquals("", sb.rightString(0));
+        assertEquals("", sb.rightString(-5));
+        assertEquals("left right", sb.rightString(15));
+    }
+
+    @Test
+    public void testLeftString() {
+        final TextStringBuilder sb = new TextStringBuilder("left right");
+        assertEquals("left", sb.leftString(4));
+        assertEquals("", sb.leftString(0));
+        assertEquals("", sb.leftString(-5));
+        assertEquals("left right", sb.leftString(15));
+    }
+
+    // -----------------------------------------------------------------------
+    @Test
+    public void testContains_char() {
+        final TextStringBuilder sb = new 
TextStringBuilder("abcdefghijklmnopqrstuvwxyz");
+        assertTrue(sb.contains('a'));
+        assertTrue(sb.contains('o'));
+        assertTrue(sb.contains('z'));
+        assertFalse(sb.contains('1'));
+    }
+
+    @Test
+    public void testContains_String() {
+        final TextStringBuilder sb = new 
TextStringBuilder("abcdefghijklmnopqrstuvwxyz");
+        assertTrue(sb.contains("a"));
+        assertTrue(sb.contains("pq"));
+        assertTrue(sb.contains("z"));
+        assertFalse(sb.contains("zyx"));
+        assertFalse(sb.contains((String) null));
+    }
+
+    @Test
+    public void testContains_StringMatcher() {
+        TextStringBuilder sb = new 
TextStringBuilder("abcdefghijklmnopqrstuvwxyz");
+        
assertTrue(sb.contains(StringMatcherFactory.INSTANCE.charMatcher('a')));
+        
assertTrue(sb.contains(StringMatcherFactory.INSTANCE.stringMatcher("pq")));
+        
assertTrue(sb.contains(StringMatcherFactory.INSTANCE.charMatcher('z')));
+        
assertFalse(sb.contains(StringMatcherFactory.INSTANCE.stringMatcher("zy")));
+        assertFalse(sb.contains((StringMatcher) null));
+
+        sb = new TextStringBuilder();
+        assertFalse(sb.contains(A_NUMBER_MATCHER));
+        sb.append("B A1 C");
+        assertTrue(sb.contains(A_NUMBER_MATCHER));
+    }
+
+    // -----------------------------------------------------------------------
+    @Test
+    public void testIndexOf_char() {
+        final TextStringBuilder sb = new TextStringBuilder("abab");
+        assertEquals(0, sb.indexOf('a'));
+
+        // should work like String#indexOf
+        assertEquals("abab".indexOf('a'), sb.indexOf('a'));
+
+        assertEquals(1, sb.indexOf('b'));
+        assertEquals("abab".indexOf('b'), sb.indexOf('b'));
+
+        assertEquals(-1, sb.indexOf('z'));
+    }
+
+    @Test
+    public void testIndexOf_char_int() {
+        TextStringBuilder sb = new TextStringBuilder("abab");
+        assertEquals(0, sb.indexOf('a', -1));
+        assertEquals(0, sb.indexOf('a', 0));
+        assertEquals(2, sb.indexOf('a', 1));
+        assertEquals(-1, sb.indexOf('a', 4));
+        assertEquals(-1, sb.indexOf('a', 5));
+
+        // should work like String#indexOf
+        assertEquals("abab".indexOf('a', 1), sb.indexOf('a', 1));
+
+        assertEquals(3, sb.indexOf('b', 2));
+        assertEquals("abab".indexOf('b', 2), sb.indexOf('b', 2));
+
+        assertEquals(-1, sb.indexOf('z', 2));
+
+        sb = new TextStringBuilder("xyzabc");
+        assertEquals(2, sb.indexOf('z', 0));
+        assertEquals(-1, sb.indexOf('z', 3));
+    }
+
+    @Test
+    public void testLastIndexOf_char() {
+        final TextStringBuilder sb = new TextStringBuilder("abab");
+
+        assertEquals(2, sb.lastIndexOf('a'));
+        // should work like String#lastIndexOf
+        assertEquals("abab".lastIndexOf('a'), sb.lastIndexOf('a'));
+
+        assertEquals(3, sb.lastIndexOf('b'));
+        assertEquals("abab".lastIndexOf('b'), sb.lastIndexOf('b'));
+
+        assertEquals(-1, sb.lastIndexOf('z'));
+    }
+
+    @Test
+    public void testLastIndexOf_char_int() {
+        TextStringBuilder sb = new TextStringBuilder("abab");
+        assertEquals(-1, sb.lastIndexOf('a', -1));
+        assertEquals(0, sb.lastIndexOf('a', 0));
+        assertEquals(0, sb.lastIndexOf('a', 1));
+
+        // should work like String#lastIndexOf
+        assertEquals("abab".lastIndexOf('a', 1), sb.lastIndexOf('a', 1));
+
+        assertEquals(1, sb.lastIndexOf('b', 2));
+        assertEquals("abab".lastIndexOf('b', 2), sb.lastIndexOf('b', 2));
+
+        assertEquals(-1, sb.lastIndexOf('z', 2));
+
+        sb = new TextStringBuilder("xyzabc");
+        assertEquals(2, sb.lastIndexOf('z', sb.length()));
+        assertEquals(-1, sb.lastIndexOf('z', 1));
+    }
+
+    // -----------------------------------------------------------------------
+    @Test
+    public void testIndexOf_String() {
+        final TextStringBuilder sb = new TextStringBuilder("abab");
+
+        assertEquals(0, sb.indexOf("a"));
+        // should work like String#indexOf
+        assertEquals("abab".indexOf("a"), sb.indexOf("a"));
+
+        assertEquals(0, sb.indexOf("ab"));
+        // should work like String#indexOf
+        assertEquals("abab".indexOf("ab"), sb.indexOf("ab"));
+
+        assertEquals(1, sb.indexOf("b"));
+        assertEquals("abab".indexOf("b"), sb.indexOf("b"));
+
+        assertEquals(1, sb.indexOf("ba"));
+        assertEquals("abab".indexOf("ba"), sb.indexOf("ba"));
+
+        assertEquals(-1, sb.indexOf("z"));
+
+        assertEquals(-1, sb.indexOf((String) null));
+    }
+
+    @Test
+    public void testIndexOf_String_int() {
+        TextStringBuilder sb = new TextStringBuilder("abab");
+        assertEquals(0, sb.indexOf("a", -1));
+        assertEquals(0, sb.indexOf("a", 0));
+        assertEquals(2, sb.indexOf("a", 1));
+        assertEquals(2, sb.indexOf("a", 2));
+        assertEquals(-1, sb.indexOf("a", 3));
+        assertEquals(-1, sb.indexOf("a", 4));
+        assertEquals(-1, sb.indexOf("a", 5));
+
+        assertEquals(-1, sb.indexOf("abcdef", 0));
+        assertEquals(0, sb.indexOf("", 0));
+        assertEquals(1, sb.indexOf("", 1));
+
+        // should work like String#indexOf
+        assertEquals("abab".indexOf("a", 1), sb.indexOf("a", 1));
+
+        assertEquals(2, sb.indexOf("ab", 1));
+        // should work like String#indexOf
+        assertEquals("abab".indexOf("ab", 1), sb.indexOf("ab", 1));
+
+        assertEquals(3, sb.indexOf("b", 2));
+        assertEquals("abab".indexOf("b", 2), sb.indexOf("b", 2));
+
+        assertEquals(1, sb.indexOf("ba", 1));
+        assertEquals("abab".indexOf("ba", 2), sb.indexOf("ba", 2));
+
+        assertEquals(-1, sb.indexOf("z", 2));
+
+        sb = new TextStringBuilder("xyzabc");
+        assertEquals(2, sb.indexOf("za", 0));
+        assertEquals(-1, sb.indexOf("za", 3));
+
+        assertEquals(-1, sb.indexOf((String) null, 2));
+    }
+
+    @Test
+    public void testLastIndexOf_String() {
+        final TextStringBuilder sb = new TextStringBuilder("abab");
+
+        assertEquals(2, sb.lastIndexOf("a"));
+        // should work like String#lastIndexOf
+        assertEquals("abab".lastIndexOf("a"), sb.lastIndexOf("a"));
+
+        assertEquals(2, sb.lastIndexOf("ab"));
+        // should work like String#lastIndexOf
+        assertEquals("abab".lastIndexOf("ab"), sb.lastIndexOf("ab"));
+
+        assertEquals(3, sb.lastIndexOf("b"));
+        assertEquals("abab".lastIndexOf("b"), sb.lastIndexOf("b"));
+
+        assertEquals(1, sb.lastIndexOf("ba"));
+        assertEquals("abab".lastIndexOf("ba"), sb.lastIndexOf("ba"));
+
+        assertEquals(-1, sb.lastIndexOf("z"));
+
+        assertEquals(-1, sb.lastIndexOf((String) null));
+    }
+
+    @Test
+    public void testLastIndexOf_String_int() {
+        TextStringBuilder sb = new TextStringBuilder("abab");
+        assertEquals(-1, sb.lastIndexOf("a", -1));
+        assertEquals(0, sb.lastIndexOf("a", 0));
+        assertEquals(0, sb.lastIndexOf("a", 1));
+        assertEquals(2, sb.lastIndexOf("a", 2));
+        assertEquals(2, sb.lastIndexOf("a", 3));
+        assertEquals(2, sb.lastIndexOf("a", 4));
+        assertEquals(2, sb.lastIndexOf("a", 5));
+
+        assertEquals(-1, sb.lastIndexOf("abcdef", 3));
+        assertEquals("abab".lastIndexOf("", 3), sb.lastIndexOf("", 3));
+        assertEquals("abab".lastIndexOf("", 1), sb.lastIndexOf("", 1));
+
+        // should work like String#lastIndexOf
+        assertEquals("abab".lastIndexOf("a", 1), sb.lastIndexOf("a", 1));
+
+        assertEquals(0, sb.lastIndexOf("ab", 1));
+        // should work like String#lastIndexOf
+        assertEquals("abab".lastIndexOf("ab", 1), sb.lastIndexOf("ab", 1));
+
+        assertEquals(1, sb.lastIndexOf("b", 2));
+        assertEquals("abab".lastIndexOf("b", 2), sb.lastIndexOf("b", 2));
+
+        assertEquals(1, sb.lastIndexOf("ba", 2));
+        assertEquals("abab".lastIndexOf("ba", 2), sb.lastIndexOf("ba", 2));
+
+        assertEquals(-1, sb.lastIndexOf("z", 2));
+
+        sb = new TextStringBuilder("xyzabc");
+        assertEquals(2, sb.lastIndexOf("za", sb.length()));
+        assertEquals(-1, sb.lastIndexOf("za", 1));
+
+        assertEquals(-1, sb.lastIndexOf((String) null, 2));
+    }
+
+    // -----------------------------------------------------------------------
+    @Test
+    public void testIndexOf_StringMatcher() {
+        final TextStringBuilder sb = new TextStringBuilder();
+        assertEquals(-1, sb.indexOf((StringMatcher) null));
+        assertEquals(-1, 
sb.indexOf(StringMatcherFactory.INSTANCE.charMatcher('a')));
+
+        sb.append("ab bd");
+        assertEquals(0, 
sb.indexOf(StringMatcherFactory.INSTANCE.charMatcher('a')));
+        assertEquals(1, 
sb.indexOf(StringMatcherFactory.INSTANCE.charMatcher('b')));
+        assertEquals(2, 
sb.indexOf(StringMatcherFactory.INSTANCE.spaceMatcher()));
+        assertEquals(4, 
sb.indexOf(StringMatcherFactory.INSTANCE.charMatcher('d')));
+        assertEquals(-1, 
sb.indexOf(StringMatcherFactory.INSTANCE.noneMatcher()));
+        assertEquals(-1, sb.indexOf((StringMatcher) null));
+
+        sb.append(" A1 junction");
+        assertEquals(6, sb.indexOf(A_NUMBER_MATCHER));
+    }
+
+    @Test
+    public void testIndexOf_StringMatcher_int() {
+        final TextStringBuilder sb = new TextStringBuilder();
+        assertEquals(-1, sb.indexOf((StringMatcher) null, 2));
+        assertEquals(-1, 
sb.indexOf(StringMatcherFactory.INSTANCE.charMatcher('a'), 2));
+        assertEquals(-1, 
sb.indexOf(StringMatcherFactory.INSTANCE.charMatcher('a'), 0));
+
+        sb.append("ab bd");
+        assertEquals(0, 
sb.indexOf(StringMatcherFactory.INSTANCE.charMatcher('a'), -2));
+        assertEquals(0, 
sb.indexOf(StringMatcherFactory.INSTANCE.charMatcher('a'), 0));
+        assertEquals(-1, 
sb.indexOf(StringMatcherFactory.INSTANCE.charMatcher('a'), 2));
+        assertEquals(-1, 
sb.indexOf(StringMatcherFactory.INSTANCE.charMatcher('a'), 20));
+
+        assertEquals(1, 
sb.indexOf(StringMatcherFactory.INSTANCE.charMatcher('b'), -1));
+        assertEquals(1, 
sb.indexOf(StringMatcherFactory.INSTANCE.charMatcher('b'), 0));
+        assertEquals(1, 
sb.indexOf(StringMatcherFactory.INSTANCE.charMatcher('b'), 1));
+        assertEquals(3, 
sb.indexOf(StringMatcherFactory.INSTANCE.charMatcher('b'), 2));
+        assertEquals(3, 
sb.indexOf(StringMatcherFactory.INSTANCE.charMatcher('b'), 3));
+        assertEquals(-1, 
sb.indexOf(StringMatcherFactory.INSTANCE.charMatcher('b'), 4));
+        assertEquals(-1, 
sb.indexOf(StringMatcherFactory.INSTANCE.charMatcher('b'), 5));
+        assertEquals(-1, 
sb.indexOf(StringMatcherFactory.INSTANCE.charMatcher('b'), 6));
+
+        assertEquals(2, 
sb.indexOf(StringMatcherFactory.INSTANCE.spaceMatcher(), -2));
+        assertEquals(2, 
sb.indexOf(StringMatcherFactory.INSTANCE.spaceMatcher(), 0));
+        assertEquals(2, 
sb.indexOf(StringMatcherFactory.INSTANCE.spaceMatcher(), 2));
+        assertEquals(-1, 
sb.indexOf(StringMatcherFactory.INSTANCE.spaceMatcher(), 4));
+        assertEquals(-1, 
sb.indexOf(StringMatcherFactory.INSTANCE.spaceMatcher(), 20));
+
+        assertEquals(-1, 
sb.indexOf(StringMatcherFactory.INSTANCE.noneMatcher(), 0));
+        assertEquals(-1, sb.indexOf((StringMatcher) null, 0));
+
+        sb.append(" A1 junction with A2");
+        assertEquals(6, sb.indexOf(A_NUMBER_MATCHER, 5));
+        assertEquals(6, sb.indexOf(A_NUMBER_MATCHER, 6));
+        assertEquals(23, sb.indexOf(A_NUMBER_MATCHER, 7));
+        assertEquals(23, sb.indexOf(A_NUMBER_MATCHER, 22));
+        assertEquals(23, sb.indexOf(A_NUMBER_MATCHER, 23));
+        assertEquals(-1, sb.indexOf(A_NUMBER_MATCHER, 24));
+    }
+
+    @Test
+    public void testLastIndexOf_StringMatcher() {
+        final TextStringBuilder sb = new TextStringBuilder();
+        assertEquals(-1, sb.lastIndexOf((StringMatcher) null));
+        assertEquals(-1, 
sb.lastIndexOf(StringMatcherFactory.INSTANCE.charMatcher('a')));
+
+        sb.append("ab bd");
+        assertEquals(0, 
sb.lastIndexOf(StringMatcherFactory.INSTANCE.charMatcher('a')));
+        assertEquals(3, 
sb.lastIndexOf(StringMatcherFactory.INSTANCE.charMatcher('b')));
+        assertEquals(2, 
sb.lastIndexOf(StringMatcherFactory.INSTANCE.spaceMatcher()));
+        assertEquals(4, 
sb.lastIndexOf(StringMatcherFactory.INSTANCE.charMatcher('d')));
+        assertEquals(-1, 
sb.lastIndexOf(StringMatcherFactory.INSTANCE.noneMatcher()));
+        assertEquals(-1, sb.lastIndexOf((StringMatcher) null));
+
+        sb.append(" A1 junction");
+        assertEquals(6, sb.lastIndexOf(A_NUMBER_MATCHER));
+    }
+
+    @Test
+    public void testLastIndexOf_StringMatcher_int() {
+        final TextStringBuilder sb = new TextStringBuilder();
+        assertEquals(-1, sb.lastIndexOf((StringMatcher) null, 2));
+        assertEquals(-1, 
sb.lastIndexOf(StringMatcherFactory.INSTANCE.charMatcher('a'), 2));
+        assertEquals(-1, 
sb.lastIndexOf(StringMatcherFactory.INSTANCE.charMatcher('a'), 0));
+        assertEquals(-1, 
sb.lastIndexOf(StringMatcherFactory.INSTANCE.charMatcher('a'), -1));
+
+        sb.append("ab bd");
+        assertEquals(-1, 
sb.lastIndexOf(StringMatcherFactory.INSTANCE.charMatcher('a'), -2));
+        assertEquals(0, 
sb.lastIndexOf(StringMatcherFactory.INSTANCE.charMatcher('a'), 0));
+        assertEquals(0, 
sb.lastIndexOf(StringMatcherFactory.INSTANCE.charMatcher('a'), 2));
+        assertEquals(0, 
sb.lastIndexOf(StringMatcherFactory.INSTANCE.charMatcher('a'), 20));
+
+        assertEquals(-1, 
sb.lastIndexOf(StringMatcherFactory.INSTANCE.charMatcher('b'), -1));
+        assertEquals(-1, 
sb.lastIndexOf(StringMatcherFactory.INSTANCE.charMatcher('b'), 0));
+        assertEquals(1, 
sb.lastIndexOf(StringMatcherFactory.INSTANCE.charMatcher('b'), 1));
+        assertEquals(1, 
sb.lastIndexOf(StringMatcherFactory.INSTANCE.charMatcher('b'), 2));
+        assertEquals(3, 
sb.lastIndexOf(StringMatcherFactory.INSTANCE.charMatcher('b'), 3));
+        assertEquals(3, 
sb.lastIndexOf(StringMatcherFactory.INSTANCE.charMatcher('b'), 4));
+        assertEquals(3, 
sb.lastIndexOf(StringMatcherFactory.INSTANCE.charMatcher('b'), 5));
+        assertEquals(3, 
sb.lastIndexOf(StringMatcherFactory.INSTANCE.charMatcher('b'), 6));
+
+        assertEquals(-1, 
sb.lastIndexOf(StringMatcherFactory.INSTANCE.spaceMatcher(), -2));
+        assertEquals(-1, 
sb.lastIndexOf(StringMatcherFactory.INSTANCE.spaceMatcher(), 0));
+        assertEquals(2, 
sb.lastIndexOf(StringMatcherFactory.INSTANCE.spaceMatcher(), 2));
+        assertEquals(2, 
sb.lastIndexOf(StringMatcherFactory.INSTANCE.spaceMatcher(), 4));
+        assertEquals(2, 
sb.lastIndexOf(StringMatcherFactory.INSTANCE.spaceMatcher(), 20));
+
+        assertEquals(-1, 
sb.lastIndexOf(StringMatcherFactory.INSTANCE.noneMatcher(), 0));
+        assertEquals(-1, sb.lastIndexOf((StringMatcher) null, 0));
+
+        sb.append(" A1 junction with A2");
+        assertEquals(-1, sb.lastIndexOf(A_NUMBER_MATCHER, 5));
+        assertEquals(-1, sb.lastIndexOf(A_NUMBER_MATCHER, 6)); // A matches, 1
+                                                               // is outside
+                                                               // bounds
+        assertEquals(6, sb.lastIndexOf(A_NUMBER_MATCHER, 7));
+        assertEquals(6, sb.lastIndexOf(A_NUMBER_MATCHER, 22));
+        assertEquals(6, sb.lastIndexOf(A_NUMBER_MATCHER, 23)); // A matches, 2
+                                                               // is outside
+                                                               // bounds
+        assertEquals(23, sb.lastIndexOf(A_NUMBER_MATCHER, 24));
+    }
+
+    static final StringMatcher A_NUMBER_MATCHER = new StringMatcher() {
+
+        @Override
+        public int isMatch(final char[] buffer, int pos, final int 
bufferStart, final int bufferEnd) {
+            if (buffer[pos] == 'A') {
+                pos++;
+                if (pos < bufferEnd && buffer[pos] >= '0' && buffer[pos] <= 
'9') {
+                    return 2;
+                }
+            }
+            return 0;
+        }
+    };
+
+    // -----------------------------------------------------------------------
+    @Test
+    public void testAsTokenizer() throws Exception {
+        // from Javadoc
+        final TextStringBuilder b = new TextStringBuilder();
+        b.append("a b ");
+        final StrTokenizer t = b.asTokenizer();
+
+        final String[] tokens1 = t.getTokenArray();
+        assertEquals(2, tokens1.length);
+        assertEquals("a", tokens1[0]);
+        assertEquals("b", tokens1[1]);
+        assertEquals(2, t.size());
+
+        b.append("c d ");
+        final String[] tokens2 = t.getTokenArray();
+        assertEquals(2, tokens2.length);
+        assertEquals("a", tokens2[0]);
+        assertEquals("b", tokens2[1]);
+        assertEquals(2, t.size());
+        assertEquals("a", t.next());
+        assertEquals("b", t.next());
+
+        t.reset();
+        final String[] tokens3 = t.getTokenArray();
+        assertEquals(4, tokens3.length);
+        assertEquals("a", tokens3[0]);
+        assertEquals("b", tokens3[1]);
+        assertEquals("c", tokens3[2]);
+        assertEquals("d", tokens3[3]);
+        assertEquals(4, t.size());
+        assertEquals("a", t.next());
+        assertEquals("b", t.next());
+        assertEquals("c", t.next());
+        assertEquals("d", t.next());
+
+        assertEquals("a b c d ", t.getContent());
+    }
+
+    // -----------------------------------------------------------------------
+    @Test
+    public void testAsReader() throws Exception {
+        final TextStringBuilder sb = new TextStringBuilder("some text");
+        Reader reader = sb.asReader();
+        assertTrue(reader.ready());
+        final char[] buf = new char[40];
+        assertEquals(9, reader.read(buf));
+        assertEquals("some text", new String(buf, 0, 9));
+
+        assertEquals(-1, reader.read());
+        assertFalse(reader.ready());
+        assertEquals(0, reader.skip(2));
+        assertEquals(0, reader.skip(-1));
+
+        assertTrue(reader.markSupported());
+        reader = sb.asReader();
+        assertEquals('s', reader.read());
+        reader.mark(-1);
+        char[] array = new char[3];
+        assertEquals(3, reader.read(array, 0, 3));
+        assertEquals('o', array[0]);
+        assertEquals('m', array[1]);
+        assertEquals('e', array[2]);
+        reader.reset();
+        assertEquals(1, reader.read(array, 1, 1));
+        assertEquals('o', array[0]);
+        assertEquals('o', array[1]);
+        assertEquals('e', array[2]);
+        assertEquals(2, reader.skip(2));
+        assertEquals(' ', reader.read());
+
+        assertTrue(reader.ready());
+        reader.close();
+        assertTrue(reader.ready());
+
+        reader = sb.asReader();
+        array = new char[3];
+        try {
+            reader.read(array, -1, 0);
+            fail();
+        } catch (final IndexOutOfBoundsException ex) {
+        }
+        try {
+            reader.read(array, 0, -1);
+            fail();
+        } catch (final IndexOutOfBoundsException ex) {
+        }
+        try {
+            reader.read(array, 100, 1);
+            fail();
+        } catch (final IndexOutOfBoundsException ex) {
+        }
+        try {
+            reader.read(array, 0, 100);
+            fail();
+        } catch (final IndexOutOfBoundsException ex) {
+        }
+        try {
+            reader.read(array, Integer.MAX_VALUE, Integer.MAX_VALUE);
+            fail();
+        } catch (final IndexOutOfBoundsException ex) {
+        }
+
+        assertEquals(0, reader.read(array, 0, 0));
+        assertEquals(0, array[0]);
+        assertEquals(0, array[1]);
+        assertEquals(0, array[2]);
+
+        reader.skip(9);
+        assertEquals(-1, reader.read(array, 0, 1));
+
+        reader.reset();
+        array = new char[30];
+        assertEquals(9, reader.read(array, 0, 30));
+    }
+
+    // -----------------------------------------------------------------------
+    @Test
+    public void testAsWriter() throws Exception {
+        final TextStringBuilder sb = new TextStringBuilder("base");
+        final Writer writer = sb.asWriter();
+
+        writer.write('l');
+        assertEquals("basel", sb.toString());
+
+        writer.write(new char[] { 'i', 'n' });
+        assertEquals("baselin", sb.toString());
+
+        writer.write(new char[] { 'n', 'e', 'r' }, 1, 2);
+        assertEquals("baseliner", sb.toString());
+
+        writer.write(" rout");
+        assertEquals("baseliner rout", sb.toString());
+
+        writer.write("ping that server", 1, 3);
+        assertEquals("baseliner routing", sb.toString());
+
+        writer.flush(); // no effect
+        assertEquals("baseliner routing", sb.toString());
+
+        writer.close(); // no effect
+        assertEquals("baseliner routing", sb.toString());
+
+        writer.write(" hi"); // works after close
+        assertEquals("baseliner routing hi", sb.toString());
+
+        sb.setLength(4); // mix and match
+        writer.write('d');
+        assertEquals("based", sb.toString());
+    }
+
+    // -----------------------------------------------------------------------
+    @Test
+    public void testEqualsIgnoreCase() {
+        final TextStringBuilder sb1 = new TextStringBuilder();
+        final TextStringBuilder sb2 = new TextStringBuilder();
+        assertTrue(sb1.equalsIgnoreCase(sb1));
+        assertTrue(sb1.equalsIgnoreCase(sb2));
+        assertTrue(sb2.equalsIgnoreCase(sb2));
+
+        sb1.append("abc");
+        assertFalse(sb1.equalsIgnoreCase(sb2));
+
+        sb2.append("ABC");
+        assertTrue(sb1.equalsIgnoreCase(sb2));
+
+        sb2.clear().append("abc");
+        assertTrue(sb1.equalsIgnoreCase(sb2));
+        assertTrue(sb1.equalsIgnoreCase(sb1));
+        assertTrue(sb2.equalsIgnoreCase(sb2));
+
+        sb2.clear().append("aBc");
+        assertTrue(sb1.equalsIgnoreCase(sb2));
+    }
+
+    // -----------------------------------------------------------------------
+    @Test
+    public void testEquals() {
+        final TextStringBuilder sb1 = new TextStringBuilder();
+        final TextStringBuilder sb2 = new TextStringBuilder();
+        assertTrue(sb1.equals(sb2));
+        assertTrue(sb1.equals(sb1));
+        assertTrue(sb2.equals(sb2));
+        assertTrue(sb1.equals((Object) sb2));
+
+        sb1.append("abc");
+        assertFalse(sb1.equals(sb2));
+        assertFalse(sb1.equals((Object) sb2));
+
+        sb2.append("ABC");
+        assertFalse(sb1.equals(sb2));
+        assertFalse(sb1.equals((Object) sb2));
+
+        sb2.clear().append("abc");
+        assertTrue(sb1.equals(sb2));
+        assertTrue(sb1.equals((Object) sb2));
+
+        assertFalse(sb1.equals(Integer.valueOf(1)));
+        assertFalse(sb1.equals("abc"));
+    }
+
+    @Test
+    public void test_LANG_1131_EqualsWithNullTextStringBuilder() throws 
Exception {
+        final TextStringBuilder sb = new TextStringBuilder();
+        final TextStringBuilder other = null;
+        assertFalse(sb.equals(other));
+    }
+
+    // -----------------------------------------------------------------------
+    @Test
+    public void testHashCode() {
+        final TextStringBuilder sb = new TextStringBuilder();
+        final int hc1a = sb.hashCode();
+        final int hc1b = sb.hashCode();
+        assertEquals(0, hc1a);
+        assertEquals(hc1a, hc1b);
+
+        sb.append("abc");
+        final int hc2a = sb.hashCode();
+        final int hc2b = sb.hashCode();
+        assertTrue(hc2a != 0);
+        assertEquals(hc2a, hc2b);
+    }
+
+    // -----------------------------------------------------------------------
+    @Test
+    public void testToString() {
+        final TextStringBuilder sb = new TextStringBuilder("abc");
+        assertEquals("abc", sb.toString());
+    }
+
+    // -----------------------------------------------------------------------
+    @Test
+    public void testToStringBuffer() {
+        final TextStringBuilder sb = new TextStringBuilder();
+        assertEquals(new StringBuffer().toString(), 
sb.toStringBuffer().toString());
+
+        sb.append("junit");
+        assertEquals(new StringBuffer("junit").toString(), 
sb.toStringBuffer().toString());
+    }
+
+    // -----------------------------------------------------------------------
+    @Test
+    public void testToStringBuilder() {
+        final TextStringBuilder sb = new TextStringBuilder();
+        assertEquals(new StringBuilder().toString(), 
sb.toStringBuilder().toString());
+
+        sb.append("junit");
+        assertEquals(new StringBuilder("junit").toString(), 
sb.toStringBuilder().toString());
+    }
+
+    // -----------------------------------------------------------------------
+    @Test
+    public void testLang294() {
+        final TextStringBuilder sb = new TextStringBuilder("\n%BLAH%\nDo more 
stuff\neven more stuff\n%BLAH%\n");
+        sb.deleteAll("\n%BLAH%");
+        assertEquals("\nDo more stuff\neven more stuff\n", sb.toString());
+    }
+
+    @Test
+    public void testIndexOfLang294() {
+        final TextStringBuilder sb = new TextStringBuilder("onetwothree");
+        sb.deleteFirst("three");
+        assertEquals(-1, sb.indexOf("three"));
+    }
+
+    // -----------------------------------------------------------------------
+    @Test
+    public void testLang295() {
+        final TextStringBuilder sb = new TextStringBuilder("onetwothree");
+        sb.deleteFirst("three");
+        assertFalse("The contains(char) method is looking beyond the end of 
the string", sb.contains('h'));
+        assertEquals("The indexOf(char) method is looking beyond the end of 
the string", -1, sb.indexOf('h'));
+    }
+
+    // -----------------------------------------------------------------------
+    @Test
+    public void testLang412Right() {
+        final TextStringBuilder sb = new TextStringBuilder();
+        sb.appendFixedWidthPadRight(null, 10, '*');
+        assertEquals("Failed to invoke appendFixedWidthPadRight correctly", 
"**********", sb.toString());
+    }
+
+    @Test
+    public void testLang412Left() {
+        final TextStringBuilder sb = new TextStringBuilder();
+        sb.appendFixedWidthPadLeft(null, 10, '*');
+        assertEquals("Failed to invoke appendFixedWidthPadLeft correctly", 
"**********", sb.toString());
+    }
+
+    @Test
+    public void testAsBuilder() {
+        final TextStringBuilder sb = new 
TextStringBuilder().appendAll("Lorem", " ", "ipsum", " ", "dolor");
+        assertEquals(sb.toString(), sb.build());
+    }
+
+    // -----------------------------------------------------------------------
+    @Test
+    public void testAppendCharBuffer() {
+        final TextStringBuilder sb1 = new TextStringBuilder();
+        final CharBuffer buf = CharBuffer.allocate(10);
+        buf.append("0123456789");
+        buf.flip();
+        sb1.append(buf);
+        assertEquals("0123456789", sb1.toString());
+
+        final TextStringBuilder sb2 = new TextStringBuilder();
+        sb2.append(buf, 1, 8);
+        assertEquals("12345678", sb2.toString());
+    }
+
+    // -----------------------------------------------------------------------
+    @Test
+    public void testAppendToWriter() throws Exception {
+        final TextStringBuilder sb = new TextStringBuilder("1234567890");
+        final StringWriter writer = new StringWriter();
+        writer.append("Test ");
+
+        sb.appendTo(writer);
+
+        assertEquals("Test 1234567890", writer.toString());
+    }
+
+    @Test
+    public void testAppendToStringBuilder() throws Exception {
+        final TextStringBuilder sb = new TextStringBuilder("1234567890");
+        final StringBuilder builder = new StringBuilder("Test ");
+
+        sb.appendTo(builder);
+
+        assertEquals("Test 1234567890", builder.toString());
+    }
+
+    @Test
+    public void testAppendToStringBuffer() throws Exception {
+        final TextStringBuilder sb = new TextStringBuilder("1234567890");
+        final StringBuffer buffer = new StringBuffer("Test ");
+
+        sb.appendTo(buffer);
+
+        assertEquals("Test 1234567890", buffer.toString());
+    }
+
+    @Test
+    public void testAppendToCharBuffer() throws Exception {
+        final TextStringBuilder sb = new TextStringBuilder("1234567890");
+        final String text = "Test ";
+        final CharBuffer buffer = CharBuffer.allocate(sb.size() + 
text.length());
+        buffer.put(text);
+
+        sb.appendTo(buffer);
+
+        buffer.flip();
+        assertEquals("Test 1234567890", buffer.toString());
+    }
+
+    @Test
+    public void testAppendCharBufferNull() throws Exception {
+        final TextStringBuilder sb = new TextStringBuilder("1234567890");
+        final CharBuffer buffer = null;
+        sb.append(buffer);
+        assertEquals("1234567890", sb.toString());
+
+        final TextStringBuilder sb1 = new TextStringBuilder("1234567890");
+        final CharBuffer buffer1 = null;
+        sb.append(buffer1, 0, 0);
+        assertEquals("1234567890", sb1.toString());
+    }
+
+    @Test
+    public void testAppendCharBufferException() throws Exception {
+        final TextStringBuilder sb = new TextStringBuilder("1234567890");
+        final String text = "Test";
+        final CharBuffer buffer = CharBuffer.allocate(sb.size() + 
text.length());
+        buffer.put(text);
+        buffer.flip();
+        try {
+            sb.append(buffer, -1, 12);
+        } catch (final StringIndexOutOfBoundsException e) {
+            assertEquals("startIndex must be valid", e.getMessage());
+        }
+
+        try {
+            sb.append(buffer, 0, -1);
+        } catch (final StringIndexOutOfBoundsException e) {
+            assertEquals("length must be valid", e.getMessage());
+        }
+
+        sb.append(buffer);
+        assertEquals("1234567890Test", sb.toString());
+    }
+
+    @Test
+    public void testAppendCharSequence() {
+        final CharSequence obj0 = null;
+        final CharSequence obj1 = new TextStringBuilder("test1");
+        final CharSequence obj2 = new StringBuilder("test2");
+        final CharSequence obj3 = new StringBuffer("test3");
+        final CharBuffer obj4 = CharBuffer.wrap("test4".toCharArray());
+
+        final TextStringBuilder sb0 = new TextStringBuilder();
+        assertEquals("", sb0.append(obj0).toString());
+
+        final TextStringBuilder sb1 = new TextStringBuilder();
+        assertEquals("test1", sb1.append(obj1).toString());
+
+        final TextStringBuilder sb2 = new TextStringBuilder();
+        assertEquals("test2", sb2.append(obj2).toString());
+
+        final TextStringBuilder sb3 = new TextStringBuilder();
+        assertEquals("test3", sb3.append(obj3).toString());
+
+        final TextStringBuilder sb4 = new TextStringBuilder();
+        assertEquals("test4", sb4.append(obj4).toString());
+
+        final TextStringBuilder sb5 = new TextStringBuilder();
+        assertEquals("", sb5.append(obj0, 0, 0).toString());
+    }
+
+    @Test
+    public void testAppendStringBuilderNull() {
+        final TextStringBuilder sb1 = new TextStringBuilder();
+        final StringBuilder b = null;
+        assertEquals("", sb1.append(b).toString());
+
+        final TextStringBuilder sb2 = new TextStringBuilder();
+        assertEquals("", sb2.append(b, 0, 0).toString());
+    }
+
+    @Test
+    public void testAppendln() {
+        final TextStringBuilder sb1 = new TextStringBuilder();
+        final char ch = 'c';
+        assertEquals("c" + System.lineSeparator(), 
sb1.appendln(ch).toString());
+    }
+
+    @Test(expected = StringIndexOutOfBoundsException.class)
+    public void 
testAppendTakingTwoIntsWithZeroThrowsStringIndexOutOfBoundsException() {
+        final Charset charset = Charset.defaultCharset();
+        final ByteBuffer byteBuffer = charset.encode("end < start");
+        final CharBuffer charBuffer = charset.decode(byteBuffer);
+
+        new TextStringBuilder(630).append(charBuffer, 0, 630);
+    }
+
+    @Test(expected = StringIndexOutOfBoundsException.class)
+    public void 
testAppendTakingTwoIntsWithIndexOutOfBoundsThrowsStringIndexOutOfBoundsExceptionTwo()
 {
+        final Charset charset = Charset.defaultCharset();
+        final ByteBuffer byteBuffer = charset.encode("asdf");
+        final CharBuffer charBuffer = charset.decode(byteBuffer);
+
+        new TextStringBuilder().append(charBuffer, 933, 654);
+    }
+
+    @Test(expected = StringIndexOutOfBoundsException.class)
+    public void testDeleteCharAtWithNegative() {
+        new TextStringBuilder().deleteCharAt((-1258));
+    }
+
+}

http://git-wip-us.apache.org/repos/asf/commons-text/blob/978e2896/src/test/java/org/apache/commons/text/similarity/LevenshteinDetailedDistanceTest.java
----------------------------------------------------------------------
diff --git 
a/src/test/java/org/apache/commons/text/similarity/LevenshteinDetailedDistanceTest.java
 
b/src/test/java/org/apache/commons/text/similarity/LevenshteinDetailedDistanceTest.java
index a1a927c..1d1c2ca 100644
--- 
a/src/test/java/org/apache/commons/text/similarity/LevenshteinDetailedDistanceTest.java
+++ 
b/src/test/java/org/apache/commons/text/similarity/LevenshteinDetailedDistanceTest.java
@@ -18,7 +18,7 @@ package org.apache.commons.text.similarity;
 
 import static org.assertj.core.api.Assertions.assertThat;
 
-import org.apache.commons.text.StrBuilder;
+import org.apache.commons.text.TextStringBuilder;
 import org.junit.Test;
 
 public class LevenshteinDetailedDistanceTest {
@@ -439,7 +439,7 @@ public class LevenshteinDetailedDistanceTest {
     @Test(expected = IllegalArgumentException.class)
     public void 
testApplyThrowsIllegalArgumentExceptionAndCreatesLevenshteinDetailedDistanceTakingInteger()
 {
         final LevenshteinDetailedDistance levenshteinDetailedDistance = new 
LevenshteinDetailedDistance(0);
-        final CharSequence charSequence = new StrBuilder();
+        final CharSequence charSequence = new TextStringBuilder();
 
         levenshteinDetailedDistance.apply(charSequence, null);
     }

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