public void EqualityOperatorsRespectsEqualityMethod()
{
var pair = new TestUnorderedPair <int>(1, 2);
var matchingPair = new TestUnorderedPair <int>(1, 2);
var nonMatchingPair = new TestUnorderedPair <int>(3, 4);
var differentTypeMatchingPair = new TestUnorderedPair <decimal>(1, 2);
var reversedPair = new TestUnorderedPair <int>(2, 1);
Assert.IsTrue(pair != null);
Assert.IsTrue((TestUnorderedPair <int>)null == null);
Assert.IsTrue(pair == matchingPair);
Assert.IsTrue(pair != nonMatchingPair);
Assert.IsTrue(pair != differentTypeMatchingPair);
Assert.IsTrue(pair == reversedPair);
Assert.IsFalse(pair == null);
Assert.IsFalse((TestUnorderedPair <int>)null != null);
Assert.IsFalse(pair != matchingPair);
Assert.IsFalse(pair == nonMatchingPair);
Assert.IsFalse(pair == differentTypeMatchingPair);
Assert.IsFalse(pair != reversedPair);
}
// Just has to not throw.
public void GetHashCodeRespectsEquality()
{
var pairHash = new TestUnorderedPair <int>(1, 2).GetHashCode();
var matchingPairHash = new TestUnorderedPair <int>(1, 2).GetHashCode();
var reversedPairHash = new TestUnorderedPair <int>(2, 1).GetHashCode();
Assert.IsTrue(pairHash.Equals(matchingPairHash));
Assert.IsTrue(pairHash.Equals(reversedPairHash));
//Don't need to assert anything about the other cases, since inequality doesn't demand unequal hashes.
var pairHash2 = new TestUnorderedPair <string>("asdkffd4T?$%Yw%LW", "2v5gws45£Q$T5tyw").GetHashCode();
var matchingPairHash2 = new TestUnorderedPair <string>("asdkffd4T?$%Yw%LW", "2v5gws45£Q$T5tyw").GetHashCode();
var reversedPairHash2 = new TestUnorderedPair <string>("2v5gws45£Q$T5tyw", "asdkffd4T?$%Yw%LW").GetHashCode();
Assert.IsTrue(pairHash2.Equals(matchingPairHash2));
Assert.IsTrue(pairHash2.Equals(reversedPairHash2));
//Don't need to assert anything about the other cases, since inequality doesn't demand unequal hashes.
}
public void EqualityTestsWork()
{
var pair = new TestUnorderedPair <int>(1, 2);
var matchingPair = new TestUnorderedPair <int>(1, 2);
var nonMatchingPair = new TestUnorderedPair <int>(3, 4);
var differentTypeMatchingPair = new TestUnorderedPair <decimal>(1, 2);
var reversedPair = new TestUnorderedPair <int>(2, 1);
Assert.IsFalse(pair.Equals(null));
Assert.IsTrue(pair.Equals(matchingPair));
Assert.IsFalse(pair.Equals(nonMatchingPair));
Assert.IsFalse(pair.Equals(differentTypeMatchingPair));
Assert.IsTrue(pair.Equals(reversedPair));
var defaultValuePair = new TestUnorderedPair <int>();
var equivalentToDefaultValuePair = new TestUnorderedPair <int>(0, 0);
Assert.IsTrue(defaultValuePair.Equals(equivalentToDefaultValuePair));
}
