xlnt/third-party/cxxtest/test/DoubleCall.h

#include <cxxtest/TestSuite.h>

//
// This test suite tests double macro invocation
// E.g. when TS_ASSERT_EQUALS( x, y ) fails, it should evaulate x and y once
// Consider TS_ASSERT_EQUALS( readNextValue(), 3 )
//

class DoubleCall : public CxxTest::TestSuite
{
public:
    int i;

    void setUp()
    {
        i = 0;
    }

    void testAssertEqualsWithSideEffects()
    {
        TS_ASSERT_EQUALS(increment(), 3);
    }

    void testAssertDiffersWithSideEffects()
    {
        TS_ASSERT_DIFFERS(increment(), 1);
    }

    void testAssertDeltaWithSideEffects()
    {
        TS_ASSERT_DELTA(increment(), 2.0, 0.5);
    }

    int increment()
    {
        return ++i;
    }
};