public void OperatorTest()
{
SortDescription left = new SortDescription("A", ListSortDirection.Ascending);
SortDescription same = new SortDescription("A", ListSortDirection.Ascending);
SortDescription diffProp = new SortDescription("B", ListSortDirection.Ascending);
SortDescription diffDir = new SortDescription("A", ListSortDirection.Descending);
Assert.IsTrue(left == same, "OP_#1");
Assert.IsFalse(left == diffProp, "OP_#2");
Assert.IsFalse(left == diffDir, "OP_#3");
Assert.IsFalse(left == null, "OP_#4");
Assert.IsFalse(left != same, "OP_#5");
Assert.IsTrue(left != diffProp, "OP_#6");
Assert.IsTrue(left != diffDir, "OP_#7");
Assert.IsTrue(left != null, "OP_#8");
Assert.IsTrue(left.Equals(same), "OP_#9");
Assert.IsFalse(left.Equals(diffProp), "OP_#10");
Assert.IsFalse(left.Equals(diffDir), "OP_#11");
Assert.IsFalse(left.Equals(null), "OP_#12");
}
