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The following commit(s) were added to refs/heads/master by this push:
     new 33032da21 Migrate JUnit 3 assertions to AssertJ in MatrixTest target 
classes
33032da21 is described below

commit 33032da217df0169e870c3d49b894e9acae9e9fd
Author: Copilot <[email protected]>
AuthorDate: Sun May 17 14:12:26 2026 +0100

    Migrate JUnit 3 assertions to AssertJ in MatrixTest target classes
    
    Co-authored-by: Andreas Veithen-Knowles <[email protected]>
---
 .../java/org/apache/axiom/util/sax/TestGetSetFeature.java  |  6 ++++--
 .../java/org/apache/axiom/util/stax/dialect/TestClose.java |  4 +++-
 .../dialect/TestCreateXMLStreamReaderThreadSafety.java     | 14 ++++++++------
 .../dialect/TestCreateXMLStreamWriterThreadSafety.java     |  4 +++-
 .../TestDisallowDoctypeDeclWithDenialOfService.java        | 10 ++++++----
 .../dialect/TestDisallowDoctypeDeclWithExternalSubset.java | 13 ++++++++-----
 .../dialect/TestDisallowDoctypeDeclWithInternalSubset.java |  9 ++++++---
 .../axiom/util/stax/dialect/TestEnableCDataReporting.java  |  6 ++++--
 .../dialect/TestGetAttributeNamespaceWithNoPrefix.java     |  4 +++-
 .../util/stax/dialect/TestGetCharacterEncodingScheme.java  |  3 ++-
 .../apache/axiom/util/stax/dialect/TestGetEncoding.java    |  3 ++-
 .../axiom/util/stax/dialect/TestGetEncodingExternal.java   |  4 +++-
 .../util/stax/dialect/TestGetEncodingFromDetection.java    |  6 +++---
 .../stax/dialect/TestGetEncodingWithCharacterStream.java   |  4 +++-
 .../dialect/TestGetNamespacePrefixDefaultNamespace.java    |  4 +++-
 .../stax/dialect/TestGetNamespaceURIWithNullNamespace.java |  4 +++-
 .../dialect/TestGetPrefixAfterWriteDefaultNamespace.java   |  4 +++-
 .../stax/dialect/TestGetPrefixAfterWriteNamespace.java     |  4 +++-
 .../axiom/util/stax/dialect/TestGetTextInProlog.java       |  6 ++++--
 .../org/apache/axiom/util/stax/dialect/TestGetVersion.java |  3 ++-
 .../util/stax/dialect/TestIsCharactersOnCDATASection.java  |  4 +++-
 .../apache/axiom/util/stax/dialect/TestIsStandalone.java   |  3 ++-
 .../apache/axiom/util/stax/dialect/TestSetPrefixScope.java |  6 ++++--
 .../apache/axiom/util/stax/dialect/TestStandaloneSet.java  |  3 ++-
 24 files changed, 87 insertions(+), 44 deletions(-)

diff --git 
a/axiom-api/src/test/java/org/apache/axiom/util/sax/TestGetSetFeature.java 
b/axiom-api/src/test/java/org/apache/axiom/util/sax/TestGetSetFeature.java
index f222b01b2..1ec90be07 100644
--- a/axiom-api/src/test/java/org/apache/axiom/util/sax/TestGetSetFeature.java
+++ b/axiom-api/src/test/java/org/apache/axiom/util/sax/TestGetSetFeature.java
@@ -18,6 +18,8 @@
  */
 package org.apache.axiom.util.sax;
 
+import static org.assertj.core.api.Assertions.assertThat;
+
 import com.google.inject.Inject;
 import com.google.inject.name.Named;
 import junit.framework.TestCase;
@@ -34,8 +36,8 @@ public class TestGetSetFeature extends TestCase {
     @Override
     protected void runTest() throws Throwable {
         xmlReader.setFeature(feature, true);
-        assertTrue(xmlReader.getFeature(feature));
+        assertThat(xmlReader.getFeature(feature)).isTrue();
         xmlReader.setFeature(feature, false);
-        assertFalse(xmlReader.getFeature(feature));
+        assertThat(xmlReader.getFeature(feature)).isFalse();
     }
 }
diff --git 
a/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestClose.java 
b/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestClose.java
index 4f80c9520..14d910270 100644
--- a/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestClose.java
+++ b/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestClose.java
@@ -18,6 +18,8 @@
  */
 package org.apache.axiom.util.stax.dialect;
 
+import static org.assertj.core.api.Assertions.assertThat;
+
 import com.google.inject.Inject;
 import javax.xml.stream.XMLStreamReader;
 import org.apache.axiom.testutils.io.InstrumentedStream;
@@ -34,6 +36,6 @@ public class TestClose extends DialectTestCase {
         InstrumentedStream in = 
streamType.instrumentStream(streamType.getStream(XMLSample.SIMPLE));
         XMLStreamReader reader = 
streamType.createXMLStreamReader(staxImpl.newNormalizedXMLInputFactory(), in);
         reader.close();
-        assertFalse(in.isClosed());
+        assertThat(in.isClosed()).isFalse();
     }
 }
diff --git 
a/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestCreateXMLStreamReaderThreadSafety.java
 
b/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestCreateXMLStreamReaderThreadSafety.java
index f0a6049d4..8926aaa01 100644
--- 
a/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestCreateXMLStreamReaderThreadSafety.java
+++ 
b/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestCreateXMLStreamReaderThreadSafety.java
@@ -18,6 +18,8 @@
  */
 package org.apache.axiom.util.stax.dialect;
 
+import static org.assertj.core.api.Assertions.assertThat;
+
 import java.io.StringReader;
 import javax.xml.stream.XMLInputFactory;
 import javax.xml.stream.XMLStreamReader;
@@ -34,12 +36,12 @@ public class TestCreateXMLStreamReaderThreadSafety extends 
DialectTestCase {
                 String text = String.valueOf((int) (Math.random() * 10000));
                 String xml = "<root>" + text + "</root>";
                 XMLStreamReader reader = factory.createXMLStreamReader(new 
StringReader(xml));
-                assertEquals(XMLStreamReader.START_DOCUMENT, 
reader.getEventType());
-                assertEquals(XMLStreamReader.START_ELEMENT, reader.next());
-                assertEquals(XMLStreamReader.CHARACTERS, reader.next());
-                assertEquals(text, reader.getText());
-                assertEquals(XMLStreamReader.END_ELEMENT, reader.next());
-                assertEquals(XMLStreamReader.END_DOCUMENT, reader.next());
+                
assertThat(reader.getEventType()).isEqualTo(XMLStreamReader.START_DOCUMENT);
+                
assertThat(reader.next()).isEqualTo(XMLStreamReader.START_ELEMENT);
+                
assertThat(reader.next()).isEqualTo(XMLStreamReader.CHARACTERS);
+                assertThat(reader.getText()).isEqualTo(text);
+                
assertThat(reader.next()).isEqualTo(XMLStreamReader.END_ELEMENT);
+                
assertThat(reader.next()).isEqualTo(XMLStreamReader.END_DOCUMENT);
                 reader.close();
             }
         });
diff --git 
a/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestCreateXMLStreamWriterThreadSafety.java
 
b/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestCreateXMLStreamWriterThreadSafety.java
index 27840e413..77cf6123e 100644
--- 
a/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestCreateXMLStreamWriterThreadSafety.java
+++ 
b/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestCreateXMLStreamWriterThreadSafety.java
@@ -18,6 +18,8 @@
  */
 package org.apache.axiom.util.stax.dialect;
 
+import static org.assertj.core.api.Assertions.assertThat;
+
 import java.io.StringWriter;
 import javax.xml.stream.XMLOutputFactory;
 import javax.xml.stream.XMLStreamWriter;
@@ -41,7 +43,7 @@ public class TestCreateXMLStreamWriterThreadSafety extends 
DialectTestCase {
                 writer.writeEndDocument();
                 writer.flush();
                 writer.close();
-                assertEquals("<root>" + text + "</root>", out.toString());
+                assertThat(out.toString()).isEqualTo("<root>" + text + 
"</root>");
             }
         });
     }
diff --git 
a/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestDisallowDoctypeDeclWithDenialOfService.java
 
b/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestDisallowDoctypeDeclWithDenialOfService.java
index 0037d218c..42b408eb0 100644
--- 
a/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestDisallowDoctypeDeclWithDenialOfService.java
+++ 
b/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestDisallowDoctypeDeclWithDenialOfService.java
@@ -18,6 +18,8 @@
  */
 package org.apache.axiom.util.stax.dialect;
 
+import static org.assertj.core.api.Assertions.assertThat;
+
 import java.io.InputStream;
 import javax.xml.stream.XMLInputFactory;
 import javax.xml.stream.XMLStreamConstants;
@@ -49,10 +51,10 @@ public class TestDisallowDoctypeDeclWithDenialOfService 
extends DialectTestCase
             } catch (RuntimeException ex) {
                 gotException = true;
             }
-            assertTrue("Expected exception", gotException);
-            assertFalse(
-                    "The parser failed to throw an exception before reaching 
the document element",
-                    reachedDocumentElement);
+            // Assert that an exception was expected
+            assertThat(gotException).isTrue();
+            // Assert that the parser failed to throw an exception before 
reaching the document element
+            assertThat(reachedDocumentElement).isFalse();
         } finally {
             in.close();
         }
diff --git 
a/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestDisallowDoctypeDeclWithExternalSubset.java
 
b/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestDisallowDoctypeDeclWithExternalSubset.java
index 082780a5c..3e3353993 100644
--- 
a/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestDisallowDoctypeDeclWithExternalSubset.java
+++ 
b/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestDisallowDoctypeDeclWithExternalSubset.java
@@ -18,6 +18,8 @@
  */
 package org.apache.axiom.util.stax.dialect;
 
+import static org.assertj.core.api.Assertions.assertThat;
+
 import java.io.StringReader;
 import javax.xml.stream.XMLInputFactory;
 import javax.xml.stream.XMLStreamConstants;
@@ -51,11 +53,12 @@ public class TestDisallowDoctypeDeclWithExternalSubset 
extends DialectTestCase {
             } catch (RuntimeException ex) {
                 gotException = true;
             }
-            assertTrue("Expected exception", gotException);
-            assertFalse("The parser tried to load external DTD subset", 
server.isRequestReceived());
-            assertFalse(
-                    "The parser failed to throw an exception before reaching 
the document element",
-                    reachedDocumentElement);
+            // Assert that an exception was expected
+            assertThat(gotException).isTrue();
+            // Assert that the parser didn't try to load the external DTD 
subset
+            assertThat(server.isRequestReceived()).isFalse();
+            // Assert that the parser failed to throw an exception before 
reaching the document element
+            assertThat(reachedDocumentElement).isFalse();
         } finally {
             server.stop();
         }
diff --git 
a/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestDisallowDoctypeDeclWithInternalSubset.java
 
b/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestDisallowDoctypeDeclWithInternalSubset.java
index db2b68109..ae585d092 100644
--- 
a/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestDisallowDoctypeDeclWithInternalSubset.java
+++ 
b/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestDisallowDoctypeDeclWithInternalSubset.java
@@ -18,6 +18,8 @@
  */
 package org.apache.axiom.util.stax.dialect;
 
+import static org.assertj.core.api.Assertions.assertThat;
+
 import java.io.StringReader;
 import javax.xml.stream.XMLInputFactory;
 import javax.xml.stream.XMLStreamConstants;
@@ -48,8 +50,9 @@ public class TestDisallowDoctypeDeclWithInternalSubset 
extends DialectTestCase {
         } catch (RuntimeException ex) {
             gotException = true;
         }
-        assertTrue("Expected exception", gotException);
-        assertFalse(
-                "The parser failed to throw an exception before reaching the 
document element", reachedDocumentElement);
+        // Assert that an exception was expected
+        assertThat(gotException).isTrue();
+        // Assert that the parser failed to throw an exception before reaching 
the document element
+        assertThat(reachedDocumentElement).isFalse();
     }
 }
diff --git 
a/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestEnableCDataReporting.java
 
b/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestEnableCDataReporting.java
index 9c67abd2d..4261cd731 100644
--- 
a/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestEnableCDataReporting.java
+++ 
b/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestEnableCDataReporting.java
@@ -18,6 +18,8 @@
  */
 package org.apache.axiom.util.stax.dialect;
 
+import static org.assertj.core.api.Assertions.assertThat;
+
 import java.io.StringReader;
 import javax.xml.stream.XMLInputFactory;
 import javax.xml.stream.XMLStreamReader;
@@ -28,7 +30,7 @@ public class TestEnableCDataReporting extends DialectTestCase 
{
         XMLInputFactory factory = 
staxImpl.getDialect().enableCDataReporting(staxImpl.newNormalizedXMLInputFactory());
         XMLStreamReader reader = factory.createXMLStreamReader(new 
StringReader("<a><![CDATA[test]]></a>"));
         reader.nextTag();
-        assertEquals(XMLStreamReader.CDATA, reader.next());
-        assertEquals("test", reader.getText());
+        assertThat(reader.next()).isEqualTo(XMLStreamReader.CDATA);
+        assertThat(reader.getText()).isEqualTo("test");
     }
 }
diff --git 
a/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestGetAttributeNamespaceWithNoPrefix.java
 
b/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestGetAttributeNamespaceWithNoPrefix.java
index fa16e4d34..6c265fe45 100644
--- 
a/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestGetAttributeNamespaceWithNoPrefix.java
+++ 
b/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestGetAttributeNamespaceWithNoPrefix.java
@@ -18,6 +18,8 @@
  */
 package org.apache.axiom.util.stax.dialect;
 
+import static org.assertj.core.api.Assertions.assertThat;
+
 import java.io.StringReader;
 import javax.xml.stream.XMLInputFactory;
 import javax.xml.stream.XMLStreamReader;
@@ -32,7 +34,7 @@ public class TestGetAttributeNamespaceWithNoPrefix extends 
DialectTestCase {
         while ((eventType = reader.next()) != XMLStreamReader.END_DOCUMENT) {
             if (eventType == XMLStreamReader.START_ELEMENT) {
                 for (int i = 0; i < reader.getAttributeCount(); i++) {
-                    assertNull(reader.getAttributeNamespace(i));
+                    assertThat(reader.getAttributeNamespace(i)).isNull();
                 }
             }
         }
diff --git 
a/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestGetCharacterEncodingScheme.java
 
b/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestGetCharacterEncodingScheme.java
index cb5ce6686..078064a4c 100644
--- 
a/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestGetCharacterEncodingScheme.java
+++ 
b/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestGetCharacterEncodingScheme.java
@@ -18,6 +18,7 @@
  */
 package org.apache.axiom.util.stax.dialect;
 
+import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.assertThatThrownBy;
 
 import java.io.ByteArrayInputStream;
@@ -30,7 +31,7 @@ public class TestGetCharacterEncodingScheme extends 
DialectTestCase {
         XMLInputFactory factory = staxImpl.newNormalizedXMLInputFactory();
         XMLStreamReader reader = factory.createXMLStreamReader(new 
ByteArrayInputStream(
                 "<?xml version='1.0' 
encoding='iso-8859-15'?><root/>".getBytes("iso-8859-15")));
-        assertEquals("iso-8859-15", reader.getCharacterEncodingScheme());
+        
assertThat(reader.getCharacterEncodingScheme()).isEqualTo("iso-8859-15");
         reader.next();
         
assertThatThrownBy(reader::getCharacterEncodingScheme).isInstanceOf(IllegalStateException.class);
         reader.close();
diff --git 
a/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestGetEncoding.java
 
b/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestGetEncoding.java
index a64a0fc37..7369fe892 100644
--- 
a/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestGetEncoding.java
+++ 
b/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestGetEncoding.java
@@ -18,6 +18,7 @@
  */
 package org.apache.axiom.util.stax.dialect;
 
+import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.assertThatThrownBy;
 
 import java.io.ByteArrayInputStream;
@@ -30,7 +31,7 @@ public class TestGetEncoding extends DialectTestCase {
         XMLInputFactory factory = staxImpl.newNormalizedXMLInputFactory();
         XMLStreamReader reader = factory.createXMLStreamReader(new 
ByteArrayInputStream(
                 "<?xml version='1.0' 
encoding='iso-8859-15'?><root/>".getBytes("iso-8859-15")));
-        assertEquals("iso-8859-15", reader.getEncoding());
+        assertThat(reader.getEncoding()).isEqualTo("iso-8859-15");
         reader.next();
         
assertThatThrownBy(reader::getEncoding).isInstanceOf(IllegalStateException.class);
         reader.close();
diff --git 
a/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestGetEncodingExternal.java
 
b/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestGetEncodingExternal.java
index 54939ba95..84e89e57f 100644
--- 
a/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestGetEncodingExternal.java
+++ 
b/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestGetEncodingExternal.java
@@ -18,6 +18,8 @@
  */
 package org.apache.axiom.util.stax.dialect;
 
+import static org.assertj.core.api.Assertions.assertThat;
+
 import java.io.ByteArrayInputStream;
 import java.nio.charset.StandardCharsets;
 import javax.xml.stream.XMLInputFactory;
@@ -33,6 +35,6 @@ public class TestGetEncodingExternal extends DialectTestCase {
         XMLInputFactory factory = staxImpl.newNormalizedXMLInputFactory();
         XMLStreamReader reader = factory.createXMLStreamReader(
                 new 
ByteArrayInputStream("<root/>".getBytes(StandardCharsets.ISO_8859_1)), 
"ISO-8859-1");
-        assertEquals("ISO-8859-1", reader.getEncoding());
+        assertThat(reader.getEncoding()).isEqualTo("ISO-8859-1");
     }
 }
diff --git 
a/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestGetEncodingFromDetection.java
 
b/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestGetEncodingFromDetection.java
index 15dcbbae2..7326335ea 100644
--- 
a/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestGetEncodingFromDetection.java
+++ 
b/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestGetEncodingFromDetection.java
@@ -18,6 +18,8 @@
  */
 package org.apache.axiom.util.stax.dialect;
 
+import static org.assertj.core.api.Assertions.assertThat;
+
 import com.google.inject.Inject;
 import com.google.inject.name.Named;
 import java.io.ByteArrayInputStream;
@@ -46,8 +48,6 @@ public class TestGetEncodingFromDetection extends 
DialectTestCase {
         XMLStreamReader reader = factory.createXMLStreamReader(
                 new ByteArrayInputStream("<?xml 
version=\"1.0\"?><root/>".getBytes(javaEncoding)));
         String actualEncoding = reader.getEncoding();
-        assertTrue(
-                "Expected one of " + xmlEncodings + ", but got " + 
actualEncoding,
-                xmlEncodings.contains(actualEncoding));
+        assertThat(actualEncoding).isIn(xmlEncodings);
     }
 }
diff --git 
a/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestGetEncodingWithCharacterStream.java
 
b/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestGetEncodingWithCharacterStream.java
index a65863773..8f5f782e4 100644
--- 
a/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestGetEncodingWithCharacterStream.java
+++ 
b/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestGetEncodingWithCharacterStream.java
@@ -18,6 +18,8 @@
  */
 package org.apache.axiom.util.stax.dialect;
 
+import static org.assertj.core.api.Assertions.assertThat;
+
 import java.io.StringReader;
 import javax.xml.stream.XMLInputFactory;
 import javax.xml.stream.XMLStreamReader;
@@ -31,6 +33,6 @@ public class TestGetEncodingWithCharacterStream extends 
DialectTestCase {
     protected void runTest() throws Throwable {
         XMLInputFactory factory = staxImpl.newNormalizedXMLInputFactory();
         XMLStreamReader reader = factory.createXMLStreamReader(new 
StringReader("<root/>"));
-        assertNull(reader.getEncoding());
+        assertThat(reader.getEncoding()).isNull();
     }
 }
diff --git 
a/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestGetNamespacePrefixDefaultNamespace.java
 
b/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestGetNamespacePrefixDefaultNamespace.java
index 345c49ba2..aaa62bb5e 100644
--- 
a/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestGetNamespacePrefixDefaultNamespace.java
+++ 
b/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestGetNamespacePrefixDefaultNamespace.java
@@ -18,6 +18,8 @@
  */
 package org.apache.axiom.util.stax.dialect;
 
+import static org.assertj.core.api.Assertions.assertThat;
+
 import java.io.StringReader;
 import javax.xml.stream.XMLInputFactory;
 import javax.xml.stream.XMLStreamReader;
@@ -28,6 +30,6 @@ public class TestGetNamespacePrefixDefaultNamespace extends 
DialectTestCase {
         XMLInputFactory factory = staxImpl.newNormalizedXMLInputFactory();
         XMLStreamReader reader = factory.createXMLStreamReader(new 
StringReader("<root xmlns=\"urn:ns\"/>"));
         reader.next();
-        assertNull(reader.getNamespacePrefix(0));
+        assertThat(reader.getNamespacePrefix(0)).isNull();
     }
 }
diff --git 
a/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestGetNamespaceURIWithNullNamespace.java
 
b/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestGetNamespaceURIWithNullNamespace.java
index 35b34bfec..8d05ab086 100644
--- 
a/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestGetNamespaceURIWithNullNamespace.java
+++ 
b/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestGetNamespaceURIWithNullNamespace.java
@@ -18,6 +18,8 @@
  */
 package org.apache.axiom.util.stax.dialect;
 
+import static org.assertj.core.api.Assertions.assertThat;
+
 import java.io.StringReader;
 import javax.xml.stream.XMLInputFactory;
 import javax.xml.stream.XMLStreamReader;
@@ -30,7 +32,7 @@ public class TestGetNamespaceURIWithNullNamespace extends 
DialectTestCase {
         int eventType;
         while ((eventType = reader.next()) != XMLStreamReader.END_DOCUMENT) {
             if (eventType == XMLStreamReader.START_ELEMENT) {
-                assertNull(reader.getNamespaceURI());
+                assertThat(reader.getNamespaceURI()).isNull();
             }
         }
     }
diff --git 
a/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestGetPrefixAfterWriteDefaultNamespace.java
 
b/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestGetPrefixAfterWriteDefaultNamespace.java
index 98d37da43..e8cbb16e6 100644
--- 
a/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestGetPrefixAfterWriteDefaultNamespace.java
+++ 
b/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestGetPrefixAfterWriteDefaultNamespace.java
@@ -18,6 +18,8 @@
  */
 package org.apache.axiom.util.stax.dialect;
 
+import static org.assertj.core.api.Assertions.assertThat;
+
 import javax.xml.stream.XMLStreamWriter;
 import org.apache.commons.io.output.NullOutputStream;
 
@@ -32,6 +34,6 @@ public class TestGetPrefixAfterWriteDefaultNamespace extends 
DialectTestCase {
                 
staxImpl.newNormalizedXMLOutputFactory().createXMLStreamWriter(NullOutputStream.INSTANCE);
         writer.writeStartElement("ns1", "root", "urn:ns1");
         writer.writeDefaultNamespace("urn:ns2");
-        assertEquals("", writer.getPrefix("urn:ns2"));
+        assertThat(writer.getPrefix("urn:ns2")).isEmpty();
     }
 }
diff --git 
a/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestGetPrefixAfterWriteNamespace.java
 
b/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestGetPrefixAfterWriteNamespace.java
index 1a335c34c..03aca52ef 100644
--- 
a/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestGetPrefixAfterWriteNamespace.java
+++ 
b/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestGetPrefixAfterWriteNamespace.java
@@ -18,6 +18,8 @@
  */
 package org.apache.axiom.util.stax.dialect;
 
+import static org.assertj.core.api.Assertions.assertThat;
+
 import javax.xml.stream.XMLStreamWriter;
 import org.apache.commons.io.output.NullOutputStream;
 
@@ -32,6 +34,6 @@ public class TestGetPrefixAfterWriteNamespace extends 
DialectTestCase {
                 
staxImpl.newNormalizedXMLOutputFactory().createXMLStreamWriter(NullOutputStream.INSTANCE);
         writer.writeStartElement("", "root", "");
         writer.writeNamespace("p", "urn:test");
-        assertEquals("p", writer.getPrefix("urn:test"));
+        assertThat(writer.getPrefix("urn:test")).isEqualTo("p");
     }
 }
diff --git 
a/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestGetTextInProlog.java
 
b/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestGetTextInProlog.java
index f8819d0ba..b25a9d69d 100644
--- 
a/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestGetTextInProlog.java
+++ 
b/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestGetTextInProlog.java
@@ -18,6 +18,8 @@
  */
 package org.apache.axiom.util.stax.dialect;
 
+import static org.assertj.core.api.Assertions.assertThat;
+
 import java.io.StringReader;
 import javax.xml.stream.XMLInputFactory;
 import javax.xml.stream.XMLStreamReader;
@@ -27,7 +29,7 @@ public class TestGetTextInProlog extends DialectTestCase {
     protected void runTest() throws Throwable {
         XMLInputFactory factory = staxImpl.newNormalizedXMLInputFactory();
         XMLStreamReader reader = factory.createXMLStreamReader(new 
StringReader("<?xml version=\"1.0\"?>\r\n<root/>"));
-        assertEquals(XMLStreamReader.SPACE, reader.next());
-        assertEquals("\n", reader.getText());
+        assertThat(reader.next()).isEqualTo(XMLStreamReader.SPACE);
+        assertThat(reader.getText()).isEqualTo("\n");
     }
 }
diff --git 
a/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestGetVersion.java
 
b/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestGetVersion.java
index f9a5421a3..76b29634c 100644
--- 
a/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestGetVersion.java
+++ 
b/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestGetVersion.java
@@ -18,6 +18,7 @@
  */
 package org.apache.axiom.util.stax.dialect;
 
+import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.assertThatThrownBy;
 
 import java.io.StringReader;
@@ -29,7 +30,7 @@ public class TestGetVersion extends DialectTestCase {
     protected void runTest() throws Throwable {
         XMLInputFactory factory = staxImpl.newNormalizedXMLInputFactory();
         XMLStreamReader reader = factory.createXMLStreamReader(new 
StringReader("<?xml version='1.0'?><root/>"));
-        assertEquals("1.0", reader.getVersion());
+        assertThat(reader.getVersion()).isEqualTo("1.0");
         reader.next();
         
assertThatThrownBy(reader::getVersion).isInstanceOf(IllegalStateException.class);
         reader.close();
diff --git 
a/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestIsCharactersOnCDATASection.java
 
b/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestIsCharactersOnCDATASection.java
index b445584da..9b174924b 100644
--- 
a/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestIsCharactersOnCDATASection.java
+++ 
b/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestIsCharactersOnCDATASection.java
@@ -18,6 +18,8 @@
  */
 package org.apache.axiom.util.stax.dialect;
 
+import static org.assertj.core.api.Assertions.assertThat;
+
 import java.io.StringReader;
 import javax.xml.stream.XMLInputFactory;
 import javax.xml.stream.XMLStreamReader;
@@ -36,6 +38,6 @@ public class TestIsCharactersOnCDATASection extends 
DialectTestCase {
         XMLStreamReader reader = factory.createXMLStreamReader(new 
StringReader("<root><![CDATA[X]]></root>"));
         reader.nextTag();
         reader.next();
-        assertTrue(reader.isCharacters());
+        assertThat(reader.isCharacters()).isTrue();
     }
 }
diff --git 
a/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestIsStandalone.java
 
b/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestIsStandalone.java
index f241c1628..2416ed7c8 100644
--- 
a/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestIsStandalone.java
+++ 
b/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestIsStandalone.java
@@ -18,6 +18,7 @@
  */
 package org.apache.axiom.util.stax.dialect;
 
+import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.assertThatThrownBy;
 
 import java.io.StringReader;
@@ -30,7 +31,7 @@ public class TestIsStandalone extends DialectTestCase {
         XMLInputFactory factory = staxImpl.newNormalizedXMLInputFactory();
         XMLStreamReader reader =
                 factory.createXMLStreamReader(new StringReader("<?xml 
version='1.0' standalone='no'?><root/>"));
-        assertEquals(false, reader.isStandalone());
+        assertThat(reader.isStandalone()).isFalse();
         reader.next();
         
assertThatThrownBy(reader::isStandalone).isInstanceOf(IllegalStateException.class);
         reader.close();
diff --git 
a/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestSetPrefixScope.java
 
b/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestSetPrefixScope.java
index 9e01bf9fd..e2104be23 100644
--- 
a/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestSetPrefixScope.java
+++ 
b/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestSetPrefixScope.java
@@ -18,6 +18,8 @@
  */
 package org.apache.axiom.util.stax.dialect;
 
+import static org.assertj.core.api.Assertions.assertThat;
+
 import java.io.ByteArrayOutputStream;
 import javax.xml.stream.XMLOutputFactory;
 import javax.xml.stream.XMLStreamWriter;
@@ -31,9 +33,9 @@ public class TestSetPrefixScope extends DialectTestCase {
         writer.writeStartElement("root");
         writer.setPrefix("p", "urn:ns");
         writer.writeStartElement("child");
-        assertEquals("p", writer.getPrefix("urn:ns"));
+        assertThat(writer.getPrefix("urn:ns")).isEqualTo("p");
         writer.writeEndElement();
-        assertEquals("p", writer.getPrefix("urn:ns"));
+        assertThat(writer.getPrefix("urn:ns")).isEqualTo("p");
         writer.writeEndElement();
         writer.writeEndDocument();
         writer.close();
diff --git 
a/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestStandaloneSet.java
 
b/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestStandaloneSet.java
index 8fba68fe2..214ae4e7c 100644
--- 
a/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestStandaloneSet.java
+++ 
b/axiom-api/src/test/java/org/apache/axiom/util/stax/dialect/TestStandaloneSet.java
@@ -18,6 +18,7 @@
  */
 package org.apache.axiom.util.stax.dialect;
 
+import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.assertThatThrownBy;
 
 import java.io.StringReader;
@@ -29,7 +30,7 @@ public class TestStandaloneSet extends DialectTestCase {
     protected void runTest() throws Throwable {
         XMLInputFactory factory = staxImpl.newNormalizedXMLInputFactory();
         XMLStreamReader reader = factory.createXMLStreamReader(new 
StringReader("<?xml version='1.0'?><root/>"));
-        assertEquals(false, reader.standaloneSet());
+        assertThat(reader.standaloneSet()).isFalse();
         reader.next();
         
assertThatThrownBy(reader::standaloneSet).isInstanceOf(IllegalStateException.class);
         reader.close();

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