aherbert commented on a change in pull request #27: Murmur3fix
URL: https://github.com/apache/commons-codec/pull/27#discussion_r346078788
##########
File path: src/test/java/org/apache/commons/codec/digest/MurmurHash3Test.java
##########
@@ -224,4 +225,238 @@ public void testSingleLongRandom() {
}
}
+ @Test
+ public void test32_x86_String() {
+ // Arrange
+ final String origin = TEST;
+
+ // Act
+ final int result = MurmurHash3.hash32_x86(origin);
+
+ // Assert
+ assertEquals(-436507231, result);
+ }
+
+ @Test
+ public void test128_x64_Short() {
+ // Arrange
+ final ByteBuffer BUFFER = ByteBuffer.allocate(MurmurHash3.SHORT_BYTES);
+ BUFFER.putShort(0, (short) 2);
+
+ // Act
+ final long[] result = MurmurHash3.hash128_x64(BUFFER.array());
+
+ // Assert
+ assertEquals(result.length, 2);
+ assertEquals(8673501042631707204L, result[0]);
+ assertEquals(491907755572407714L, result[1]);
+ }
+
+ @Test
+ public void test128_x64_Int() {
+ // Arrange
+ final ByteBuffer BUFFER =
ByteBuffer.allocate(MurmurHash3.INTEGER_BYTES);
+ BUFFER.putInt(0, 3);
+
+ // Act
+ final long[] result = MurmurHash3.hash128_x64(BUFFER.array());
+
+ // Assert
+ assertEquals(result.length, 2);
+ assertEquals(2448828847287705405L, result[0]);
+ assertEquals(-4568642211270719983L, result[1]);
+ }
+
+ @Test
+ public void test128_x64_Long() {
+ // Arrange
+ final ByteBuffer BUFFER = ByteBuffer.allocate(MurmurHash3.LONG_BYTES);
+ BUFFER.putLong(0, 8675309L);
+
+ // Act
+ final long[] result = MurmurHash3.hash128_x64(BUFFER.array());
+
+ // Assert
+ assertEquals(result.length, 2);
+ assertEquals(2339756411022791995L, result[0]);
+ assertEquals(8242951144762217305L, result[1]);
+ }
+
+ @Test
+ public void test128_x64_Double() {
+ // Arrange
+ final ByteBuffer BUFFER = ByteBuffer.allocate(Double.SIZE / Byte.SIZE);
+ BUFFER.putDouble(0, 456.987);
+
+ // Act
+ final long[] result = MurmurHash3.hash128_x64(BUFFER.array());
+
+ // Assert
+ assertEquals(result.length, 2);
+ assertEquals(6877430437712399133L, result[0]);
+ assertEquals(-8576421050167250536L, result[1]);
+ }
+
+ @Test
+ public void test128_x64_String() {
+ // Arrange
+ final String origin = TEST;
+
+ // Act
+ final long[] result = MurmurHash3.hash128_x64(origin);
+
+ // Assert
+ assertEquals(result.length, 2);
+ assertEquals(6409160382500807310L, result[0]);
+ assertEquals(-7835827609130513921L, result[1]);
+ }
+
+
+
+ @Test
+ public void testTwoLongOrdered_32x86() {
+ final ByteBuffer buffer = ByteBuffer.allocate(MurmurHash3.LONG_BYTES *
2);
+ for (long i = 0; i < 1000; i++) {
+ for (long j = 0; j < 1000; j++) {
+ buffer.putLong(0, i);
+ buffer.putLong(MurmurHash3.LONG_BYTES, j);
+ assertEquals(MurmurHash3.hash32_x86(buffer.array()),
MurmurHash3.hash32_x86(i, j));
+ }
+ }
+ }
+
+ @Test
+ public void testTwoLongRandom_32x86() {
+ final ByteBuffer buffer = ByteBuffer.allocate(MurmurHash3.LONG_BYTES *
2);
+ final Random random = new Random();
+ for (long i = 0; i < 1000; i++) {
+ for (long j = 0; j < 1000; j++) {
+ final long x = random.nextLong();
+ final long y = random.nextLong();
+ buffer.putLong(0, x);
+ buffer.putLong(MurmurHash3.LONG_BYTES, y);
+ assertEquals(MurmurHash3.hash32_x86(buffer.array()),
MurmurHash3.hash32_x86(x, y));
+ }
+ }
+ }
+
+ @Test
+ public void testSingleLongOrdered_32x86() {
+ final ByteBuffer buffer = ByteBuffer.allocate(MurmurHash3.LONG_BYTES);
+ for (long i = 0; i < 1000; i++) {
+ buffer.putLong(0, i);
+ assertEquals(MurmurHash3.hash32_x86(buffer.array()),
MurmurHash3.hash32_x86(i));
+ }
+ }
+
+ @Test
+ public void testSingleLongRandom_32x86() {
+ final ByteBuffer buffer = ByteBuffer.allocate(MurmurHash3.LONG_BYTES);
+ final Random random = new Random();
+ for (long i = 0; i < 1000; i++) {
+ final long x = random.nextLong();
+ buffer.putLong(0, x);
+ assertEquals(MurmurHash3.hash32_x86(buffer.array()),
MurmurHash3.hash32_x86(x));
+ }
+ }
+
+ @Test
Review comment:
All code from this point down has different whitespace indentation.
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