Filling out ReverseComparator testing
git-svn-id: https://svn.apache.org/repos/asf/commons/proper/lang/trunk@1160015 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/src/test/java/org/apache/commons/lang3/compare/ReverseComparatorTest.java b/src/test/java/org/apache/commons/lang3/compare/ReverseComparatorTest.java
index ad417d6..b946b92 100644
--- a/src/test/java/org/apache/commons/lang3/compare/ReverseComparatorTest.java
+++ b/src/test/java/org/apache/commons/lang3/compare/ReverseComparatorTest.java
@@ -49,4 +49,39 @@
assertTrue("Comparison wasn't reversed", rc.compare( "aardvark", "baa" ) > 0 );
}
+ @Test
+ public void testTwoCallsCancel() {
+ ReverseComparator rc = new ReverseComparator(new ReverseComparator());
+
+ // back to front tests
+ assertTrue("Reversal wasn't cancelled out", rc.compare( 1, 2 ) < 0 );
+ assertTrue("Reversal wasn't cancelled out", rc.compare( 2, 1 ) > 0 );
+ assertTrue("Reversal wasn't cancelled out", rc.compare( "aardvark", "baa" ) < 0 );
+ assertTrue("Reversal wasn't cancelled out", rc.compare( "baa", "aardvark" ) > 0 );
+ }
+
+ @Test
+ public void testEquality() {
+ ReverseComparator rc1 = new ReverseComparator();
+ ReverseComparator rc2 = new ReverseComparator(rc1);
+ ReverseComparator rc3 = new ReverseComparator(rc1);
+
+ // test same instance
+ assertTrue("Same instance wasn't equal", rc1.equals(rc1));
+ assertEquals("Equal instance has different hash code", rc1.hashCode(), rc1.hashCode());
+
+ // test null not equal
+ assertFalse("Null was equal", rc1.equals(null));
+
+ // test diff subcomparator not equal
+ assertFalse("Was equal despite different nested comparators", rc1.equals(rc2));
+
+ // test same subcomparator equal
+ assertTrue("Wasn't equal despite same nested comparator", rc2.equals(rc3));
+ assertEquals("Same subcomparator had different hash code", rc2.hashCode(), rc3.hashCode());
+
+ // test different type not equal
+ assertFalse("Was equal despite not being same class", rc1.equals(this));
+ }
+
}
