Function return values

Zero is often an adequate value to return from mock functions. In addition - by the use of an optional paremeter to the EXPECT macro, any non-zero value can be returned to the unit.

  void test_addition(void) {
    EXPECT  ( invalid );
    EXPECT  ( invalid, TRUE );
    VALIDATE(calculate(3,7,'+'), -1);
  }
As sample5 shows above2.1, the EXPECT macro is used to indicate to the framework, that this test expects invalid() function calls twice. The first call to invalid should return default 0 (FALSE) and the second should return TRUE. If the second invalid() function call is detected, the framewrok will make the mock return the value TRUE to calculate.

If the actual and expected function call matches, and the expected function is present in the unit, the framework will not call that function, but instead return the value given by the test.

If the actual and expected function call do not match and the expected function is not present in the unit, the framework will report an error that an unexpected function call was detected.

If the actual and expected function call do not match and the actual is present in the unit, the framework will not interfere. The unit will then simply call that function.

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