function test_null() { //Arrange $test_RockPaperScissors = new RockPaperScissors(); $first_input = null; $second_input = null; //Act $result = $test_RockPaperScissors->makeRockPaperScissors($first_input, $second_input); //Assert $this->assertEquals("Please select an option from both menus", $result); }