public void PropertiesEqual_IfExpectedAndActualAreNull_NoErrorReturned()
        {
            TestObject1Property expected = null;
            TestObject1Property actual   = null;

            Assert.That(actual, Properties.Equal(expected));
        }
        public void PropertiesEqual_IfActualIsNull_ErrorReturned()
        {
            TestObject1Property expected = new TestObject1Property();
            TestObject1Property actual   = null;
            var ex = Assert.Throws <AssertionException>(() => Assert.That(actual, Properties.Equal(expected)));

            Assert.That(ex.Message, Contains.Substring("Actual is null"));
        }