Describe(basic_tests)
{
  It(test1){Assert::That(operation(12, 12), Equals("added"));}
	It(test2){Assert::That(operation(100, 76), Equals("subtracted"));}
	It(test3){Assert::That(operation(6, 4), Equals("multiplied"));}
	It(test4){Assert::That(operation(528, 22), Equals("divided"));}
	It(test5){Assert::That(operation(10, 12), Equals("Invalid"));}
};