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Mocking functions returning floating point values

Sample262.1below illustrates how to mock a function that is returning a double and how to use the macros SIMULATE_VALUE and SIMULATE_VALUE_FP to access both representations of the simulate value. 

  #define PI (4.0 * atan( 1.0 ))

  double mock_pi() {
    return SIMULATE_VALUE_FP;
    } 

  double integer_mock_pi() {
    return SIMULATE_VALUE;
    }
    
  void test_deg2rad(void) {
    EXPECT_VALIDATE( pi, mock_pi, PI );
    VALIDATE_FP    ( deg2rad(360), 2*PI);
    EXPECT_VALIDATE( pi, integer_mock_pi, PI );
    VALIDATE       ( deg2rad(360), 2*PI);
    }

It is safe to mix the usage of these macros with both integers or floating points values, i.e if SIMULATE_VALUE_FP is used as an integer value, the compiler will cast it to an integer value, and if SIMULATE_VALUE is used as a floating point value, it will be cast to an floating point value.


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