public void assert_equal() { Assertion.Equal(string.Empty, string.Empty); Assert.Throws <ArgumentException>(() => Assertion.Equal(null, null)); Assert.Throws <ArgumentException>(() => Assertion.Equal(null, new object())); Assert.Throws <ArgumentException>(() => Assertion.Equal(new object(), null)); Assert.Throws <ArgumentException>(() => Assertion.Equal(new object(), new object())); }