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Simulating output from mock functions, part one

The mock function has the same prototype as the function is validates, so it is possible for it to return a value, that the framework return to calculate.

The mock shown below will return EXPECTED_SUM, which the framework will return back to calculate. Other tests may require a different return value, so they will use another mock. It is possible to have many mocks, each of which returns different values for different test scenarios. 

  int check_add(int left_operand, int right_operand) {
    VALIDATE(left_operand,3);
    VALIDATE(right_operand,7);
    return EXPECTED_SUM;
    }

If the function mock is mocking a function that is present in the unit, it is possible, for the mock function to call that function.

In sample7 below2.1, the function add is present in the unit 

  int check_add(int left_operand, int right_operand) {
    VALIDATE(left_operand,3);
    VALIDATE(right_operand,7);
    return add(left_operand, right_operand);
    }

Calling the mocked function is a possibillity - it is not required.


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