JUCE/modules/juce_data_structures/values/juce_CachedValue.cpp

/*
  ==============================================================================

   This file is part of the JUCE framework.
   Copyright (c) Raw Material Software Limited

   JUCE is an open source framework subject to commercial or open source
   licensing.

   By downloading, installing, or using the JUCE framework, or combining the
   JUCE framework with any other source code, object code, content or any other
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   framework to you, and you must discontinue the installation or download
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   Or:

   You may also use this code under the terms of the AGPLv3:
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   THE JUCE FRAMEWORK IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL
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   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE DISCLAIMED.

  ==============================================================================
*/

namespace juce
{

#if JUCE_UNIT_TESTS

class CachedValueTests final : public UnitTest
{
public:
    CachedValueTests()
        : UnitTest ("CachedValues", UnitTestCategories::values)
    {}

    void runTest() override
    {
        beginTest ("default constructor");
        {
            CachedValue<String> cv;
            expect (cv.isUsingDefault());
            expect (cv.get() == String());
        }

        beginTest ("without default value");
        {
            ValueTree t ("root");
            t.setProperty ("testkey", "testvalue", nullptr);

            CachedValue<String> cv (t, "testkey", nullptr);

            expect (! cv.isUsingDefault());
            expect (cv.get() == "testvalue");

            cv.resetToDefault();

            expect (cv.isUsingDefault());
            expect (cv.get() == String());
        }

        beginTest ("with default value");
        {
            ValueTree t ("root");
            t.setProperty ("testkey", "testvalue", nullptr);

            CachedValue<String> cv (t, "testkey", nullptr, "defaultvalue");

            expect (! cv.isUsingDefault());
            expect (cv.get() == "testvalue");

            cv.resetToDefault();

            expect (cv.isUsingDefault());
            expect (cv.get() == "defaultvalue");
        }

        beginTest ("with default value (int)");
        {
            ValueTree t ("root");
            t.setProperty ("testkey", 23, nullptr);

            CachedValue<int> cv (t, "testkey", nullptr, 34);

            expect (! cv.isUsingDefault());
            expect (cv == 23);
            expectEquals (cv.get(), 23);

            cv.resetToDefault();

            expect (cv.isUsingDefault());
            expect (cv == 34);
        }

        beginTest ("with void value");
        {
            ValueTree t ("root");
            t.setProperty ("testkey", var(), nullptr);

            CachedValue<String> cv (t, "testkey", nullptr, "defaultvalue");

            expect (! cv.isUsingDefault());
            expect (cv == "");
            expectEquals (cv.get(), String());
        }

        beginTest ("with non-existent value");
        {
            ValueTree t ("root");

            CachedValue<String> cv (t, "testkey", nullptr, "defaultvalue");

            expect (cv.isUsingDefault());
            expect (cv == "defaultvalue");
            expect (cv.get() == "defaultvalue");
        }

        beginTest ("with value changing");
        {
            ValueTree t ("root");
            t.setProperty ("testkey", "oldvalue", nullptr);

            CachedValue<String> cv (t, "testkey", nullptr, "defaultvalue");
            expect (cv == "oldvalue");

            t.setProperty ("testkey", "newvalue", nullptr);
            expect (cv != "oldvalue");
            expect (cv == "newvalue");
        }

        beginTest ("set value");
        {
            ValueTree t ("root");
            t.setProperty ("testkey", 23, nullptr);

            CachedValue<int> cv (t, "testkey", nullptr, 45);
            cv = 34;

            expectEquals ((int) t["testkey"], 34);

            cv.resetToDefault();
            expect (cv == 45);
            expectEquals (cv.get(), 45);

            expect (t["testkey"] == var());
        }
    }
};

static CachedValueTests cachedValueTests;

#endif

} // namespace juce