public void Returns_True_When_Validating_Null_Values()
{
// Arrange
var assertion = new IsNullAssertion(null);
// Act
bool result = assertion.IsValid();
// Assert
Assert.IsTrue(result);
}
public void Returns_False_When_Validating_Non_Null_Values()
{
// Arrange
var assertion = new IsNullAssertion(new object());
// Act
bool result = assertion.IsValid();
// Assert
Assert.IsFalse(result);
}