tracktion_ConstrainedCachedValue.cpp

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 /*
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    Tracktion Engine uses a GPL/commercial licence - see LICENCE.md for details.
*/
 
namespace tracktion { inline namespace engine
{
 
#if TRACKTION_UNIT_TESTS && ENGINE_UNIT_TESTS_CONSTRAINED_CACHED_VALUE
 
class ConstrainedCachedValueTests   : public juce::UnitTest
{
public:
    ConstrainedCachedValueTests()
        : juce::UnitTest ("ConstrainedCachedValue ", "Tracktion") {}
 
    //==============================================================================
    void runTest() override
    {
        beginTest ("Odd/even tests");
        {
            juce::ValueTree state ("TREE");
            ConstrainedCachedValue<int> value;
            value.setConstrainer ([] (int v) { return v % 2 == 0 ? v : v + 1; });
            value.referTo (state, "value", nullptr);
 
            expectEquals (value.get(), 0);
            value = 1;
            expectEquals (value.get(), 2);
            value = 2;
            expectEquals (value.get(), 2);
            value = 17;
            expectEquals (value.get(), 18);
        }
 
        beginTest ("ceil/floor tests");
        {
            juce::ValueTree state ("TREE");
            ConstrainedCachedValue<float> value;
            bool useCeil = true;
            value.setConstrainer ([&useCeil] (float v) { return useCeil ? std::ceil (v) : std::floor (v); });
            value.referTo (state, "value", nullptr);
 
            expectWithinAbsoluteError (value.getDefault(), 0.0f, 0.00000000000001f);
            expectWithinAbsoluteError (value.get(), 0.0f, 0.00000000000001f);
            value = 1.1f;
            expectWithinAbsoluteError (value.get(), 2.0f, 0.00000000000001f);
            value = 2.7f;
            expectWithinAbsoluteError (value.get(), 3.0f, 0.00000000000001f);
 
            useCeil = false;
            value = 2.7f;
            expectWithinAbsoluteError (value.get(), 2.0f, 0.00000000000001f);
            value = 1.1f;
            expectWithinAbsoluteError (value.get(), 1.0f, 0.00000000000001f);
            value = -3.0f;
            expectWithinAbsoluteError (value.get(), -3.0f, 0.00000000000001f);
 
            value.referTo (state, "value", nullptr, 1.2f);
            expectWithinAbsoluteError (value.getDefault(), 1.0f, 0.00000000000001f);
            expectWithinAbsoluteError (value.get(), -3.0f, 0.00000000000001f);
        }
    }
};
 
static ConstrainedCachedValueTests constrainedCachedValueTests;
 
#endif // TRACKTION_UNIT_TESTS
 
}} // namespace tracktion { inline namespace engine