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This commit is contained in:
aherbert 2022-08-30 15:18:38 +01:00
parent 955f7ab1eb
commit 84fb830481
1 changed files with 21 additions and 21 deletions
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42
src/test/java/org/apache/commons/collections4/bloomfilter/EnhancedDoubleHasherTest.java
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@ -43,39 +43,39 @@ public class EnhancedDoubleHasherTest extends AbstractHasherTest {
@Test
public void testByteConstructor() {
// single value become increment.
EnhancedDoubleHasher hasher = new EnhancedDoubleHasher( new byte[] { 1 } );
assertEquals( 0, hasher.getInitial() );
assertEquals( 0x01_00_00_00_00_00_00_00L, hasher.getIncrement() );
EnhancedDoubleHasher hasher = new EnhancedDoubleHasher(new byte[] {1});
assertEquals(0, hasher.getInitial());
assertEquals(0x01_00_00_00_00_00_00_00L, hasher.getIncrement());
// 2 bytes become initial and increment.
hasher = new EnhancedDoubleHasher( new byte[] { 1, 2 } );
assertEquals( 0x01_00_00_00_00_00_00_00L, hasher.getInitial() );
assertEquals( 0x200000000000000L, hasher.getIncrement() );
hasher = new EnhancedDoubleHasher(new byte[] {1, 2});
assertEquals(0x01_00_00_00_00_00_00_00L, hasher.getInitial());
assertEquals(0x02_00_00_00_00_00_00_00L, hasher.getIncrement());
// odd values place extra byte in increment.
hasher = new EnhancedDoubleHasher( new byte[] { 1, 2, 3 } );
assertEquals( 0x01_00_00_00_00_00_00_00L, hasher.getInitial() );
assertEquals( 0x203000000000000L, hasher.getIncrement() );
hasher = new EnhancedDoubleHasher(new byte[] {1, 2, 3});
assertEquals(0x01_00_00_00_00_00_00_00L, hasher.getInitial());
assertEquals(0x02_03_00_00_00_00_00_00L, hasher.getIncrement());
// even short split
hasher = new EnhancedDoubleHasher( new byte[] {0, 1, 0, 2 } );
assertEquals( 0x01_00_00_00_00_00_00L, hasher.getInitial() );
assertEquals( 0x02_00_00_00_00_00_00L, hasher.getIncrement() );
hasher = new EnhancedDoubleHasher(new byte[] {0, 1, 0, 2});
assertEquals(0x01_00_00_00_00_00_00L, hasher.getInitial());
assertEquals(0x02_00_00_00_00_00_00L, hasher.getIncrement());
// longs are parse correctly
hasher = new EnhancedDoubleHasher( new byte[] { 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 2 } );
assertEquals( 1, hasher.getInitial() );
assertEquals( 2, hasher.getIncrement() );
hasher = new EnhancedDoubleHasher(new byte[] {0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 2});
assertEquals(1, hasher.getInitial());
assertEquals(2, hasher.getIncrement());
// excess bytes are ignored before mid point and at end
hasher = new EnhancedDoubleHasher( new byte[] { 0, 0, 0, 0, 0, 0, 0, 1, 5, 5, 0, 0, 0, 0, 0, 0, 0, 2, 5, 5 } );
assertEquals( 1, hasher.getInitial() );
assertEquals( 2, hasher.getIncrement() );
hasher = new EnhancedDoubleHasher(new byte[] {0, 0, 0, 0, 0, 0, 0, 1, 5, 5, 0, 0, 0, 0, 0, 0, 0, 2, 5, 5});
assertEquals(1, hasher.getInitial());
assertEquals(2, hasher.getIncrement());
// odd extra bytes are accounted for correctly
hasher = new EnhancedDoubleHasher( new byte[] { 0, 0, 0, 0, 0, 0, 0, 1, 5, 1, 0, 0, 0, 0, 0, 0, 2, 5, 5 } );
assertEquals( 1, hasher.getInitial() );
assertEquals( 0x01_00_00_00_00_00_00_02L, hasher.getIncrement() );
hasher = new EnhancedDoubleHasher(new byte[] {0, 0, 0, 0, 0, 0, 0, 1, 5, 1, 0, 0, 0, 0, 0, 0, 2, 5, 5});
assertEquals(1, hasher.getInitial());
assertEquals(0x01_00_00_00_00_00_00_02L, hasher.getIncrement());
// test empty buffer
assertThrows(IllegalArgumentException.class, () -> new EnhancedDoubleHasher(new byte[0]));