private void TestEq <T>(bool eq, Comparable <T> id1, Comparable <T> id2)
{
int h1 = id1.GetHashCode();
int h2 = id2.GetHashCode();
// eq reflectivity:
NUnit.Framework.Assert.IsTrue(id1.Equals(id1));
NUnit.Framework.Assert.IsTrue(id2.Equals(id2));
NUnit.Framework.Assert.AreEqual(0, id1.CompareTo((T)id1));
NUnit.Framework.Assert.AreEqual(0, id2.CompareTo((T)id2));
// eq symmetry:
NUnit.Framework.Assert.AreEqual(eq, id1.Equals(id2));
NUnit.Framework.Assert.AreEqual(eq, id2.Equals(id1));
// null comparison:
NUnit.Framework.Assert.IsFalse(id1.Equals(null));
NUnit.Framework.Assert.IsFalse(id2.Equals(null));
// compareTo:
NUnit.Framework.Assert.AreEqual(eq, 0 == id1.CompareTo((T)id2));
NUnit.Framework.Assert.AreEqual(eq, 0 == id2.CompareTo((T)id1));
// compareTo must be antisymmetric:
NUnit.Framework.Assert.AreEqual(Sign(id1.CompareTo((T)id2)), -Sign(id2.CompareTo(
(T)id1)));
// compare with null should never return 0 to be consistent with #equals():
NUnit.Framework.Assert.IsTrue(id1.CompareTo(null) != 0);
NUnit.Framework.Assert.IsTrue(id2.CompareTo(null) != 0);
// check that hash codes did not change:
NUnit.Framework.Assert.AreEqual(h1, id1.GetHashCode());
NUnit.Framework.Assert.AreEqual(h2, id2.GetHashCode());
if (eq)
{
// in this case the hash codes must be the same:
NUnit.Framework.Assert.AreEqual(h1, h2);
}
}
