Tools/TestWebKitAPI/Tests/WebCore/CalculationValue.cpp

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#include "config.h"

#include <WebCore/CalcExpressionNode.h>
#include <WebCore/CalculationValue.h>
#include <wtf/RefPtr.h>

namespace WTF {
class TextStream;
};

namespace TestWebKitAPI {

static unsigned deletionCount;

class CalculationDeletionTestNode : public WebCore::CalcExpressionNode {
    WTF_MAKE_FAST_ALLOCATED;
public:
    virtual ~CalculationDeletionTestNode()
    {
        ++deletionCount;
    }

    float evaluate(float) const override { return 0; }
    bool operator==(const CalcExpressionNode&) const override { ASSERT_NOT_REACHED(); return false; }

private:
    void dump(WTF::TextStream&) const override { };
};

static Ref<WebCore::CalculationValue> createTestValue()
{
    auto node = makeUnique<CalculationDeletionTestNode>();
    return WebCore::CalculationValue::create(WTFMove(node), WebCore::ValueRange::All);
}

TEST(CalculationValue, LengthConstruction)
{
    RefPtr<WebCore::CalculationValue> value = createTestValue();

    EXPECT_EQ(1U, value->refCount());

    {
        WebCore::Length length(*value);
        EXPECT_EQ(2U, value->refCount());
    }

    EXPECT_EQ(1U, value->refCount());

    {
        WebCore::Length lengthA(*value);
        EXPECT_EQ(2U, value->refCount());
        WebCore::Length lengthB(lengthA);
        EXPECT_EQ(2U, value->refCount());
    }

    EXPECT_EQ(1U, value->refCount());

    {
        WebCore::Length lengthC(*value);
        EXPECT_EQ(2U, value->refCount());
        WebCore::Length lengthD(WTFMove(lengthC));
        EXPECT_EQ(2U, value->refCount());
    }

    EXPECT_EQ(1U, value->refCount());

    EXPECT_EQ(0U, deletionCount);
    value = nullptr;
    EXPECT_EQ(1U, deletionCount);
    deletionCount = 0;
}

TEST(CalculationValue, LengthConstructionReleasedValue)
{
    RefPtr<WebCore::CalculationValue> value = createTestValue();

    EXPECT_EQ(1U, value->refCount());

    {
        auto* rawValue = value.get();
        WebCore::Length length(value.releaseNonNull());
        EXPECT_EQ(1U, rawValue->refCount());

        EXPECT_EQ(0U, deletionCount);
    }

    EXPECT_EQ(1U, deletionCount);
    deletionCount = 0;

    value = createTestValue();

    {
        auto* rawValue = value.get();
        WebCore::Length lengthA(value.releaseNonNull());
        EXPECT_EQ(1U, rawValue->refCount());
        WebCore::Length lengthB(lengthA);
        EXPECT_EQ(1U, rawValue->refCount());

        EXPECT_EQ(0U, deletionCount);
    }

    EXPECT_EQ(1U, deletionCount);
    deletionCount = 0;

    value = createTestValue();

    {
        auto* rawValue = value.get();
        WebCore::Length lengthC(value.releaseNonNull());
        EXPECT_EQ(1U, rawValue->refCount());
        WebCore::Length lengthD(WTFMove(lengthC));
        EXPECT_EQ(1U, rawValue->refCount());

        EXPECT_EQ(0U, deletionCount);
    }

    EXPECT_EQ(1U, deletionCount);
    deletionCount = 0;
}

TEST(CalculationValue, LengthAssignment)
{
    RefPtr<WebCore::CalculationValue> value = createTestValue();

    EXPECT_EQ(1U, value->refCount());

    {
        WebCore::Length lengthA(*value);
        EXPECT_EQ(2U, value->refCount());
        WebCore::Length lengthB;
        lengthB = lengthA;
        EXPECT_EQ(2U, value->refCount());
    }

    EXPECT_EQ(1U, value->refCount());

    {
        WebCore::Length lengthC(*value);
        EXPECT_EQ(2U, value->refCount());
        WebCore::Length lengthD;
        lengthD = WTFMove(lengthC);
        EXPECT_EQ(2U, value->refCount());
    }

    EXPECT_EQ(1U, value->refCount());

    EXPECT_EQ(0U, deletionCount);
    value = nullptr;
    EXPECT_EQ(1U, deletionCount);
    deletionCount = 0;

    value = createTestValue();
    RefPtr<WebCore::CalculationValue> value2 = createTestValue();

    EXPECT_EQ(1U, value->refCount());
    EXPECT_EQ(1U, value2->refCount());

    {
        WebCore::Length lengthE(*value);
        EXPECT_EQ(2U, value->refCount());
        WebCore::Length lengthF(*value2);
        EXPECT_EQ(2U, value2->refCount());
        lengthE = lengthF;
        EXPECT_EQ(1U, value->refCount());
        EXPECT_EQ(2U, value2->refCount());
    }

    EXPECT_EQ(1U, value->refCount());
    EXPECT_EQ(1U, value2->refCount());

    {
        WebCore::Length lengthG(*value);
        EXPECT_EQ(2U, value->refCount());
        WebCore::Length lengthH(*value2);
        EXPECT_EQ(2U, value2->refCount());
        lengthG = WTFMove(lengthH);
        EXPECT_EQ(1U, value->refCount());
        EXPECT_EQ(2U, value2->refCount());
    }

    EXPECT_EQ(0U, deletionCount);
    value = nullptr;
    EXPECT_EQ(1U, deletionCount);
    value2 = nullptr;
    EXPECT_EQ(2U, deletionCount);
    deletionCount = 0;
}

TEST(CalculationValue, LengthAssignmentReleasedValue)
{
    RefPtr<WebCore::CalculationValue> value = createTestValue();

    {
        auto* rawValue = value.get();
        WebCore::Length lengthA(value.releaseNonNull());
        EXPECT_EQ(1U, rawValue->refCount());
        WebCore::Length lengthB;
        lengthB = lengthA;
        EXPECT_EQ(1U, rawValue->refCount());

        EXPECT_EQ(0U, deletionCount);
    }

    EXPECT_EQ(1U, deletionCount);
    deletionCount = 0;

    value = createTestValue();

    {
        auto* rawValue = value.get();
        WebCore::Length lengthC(value.releaseNonNull());
        EXPECT_EQ(1U, rawValue->refCount());
        WebCore::Length lengthD;
        lengthD = WTFMove(lengthC);
        EXPECT_EQ(1U, rawValue->refCount());

        EXPECT_EQ(0U, deletionCount);
    }

    EXPECT_EQ(1U, deletionCount);
    deletionCount = 0;

    value = createTestValue();
    RefPtr<WebCore::CalculationValue> value2 = createTestValue();

    EXPECT_EQ(1U, value->refCount());
    EXPECT_EQ(1U, value2->refCount());

    {
        auto* rawValue = value.get();
        WebCore::Length lengthE(value.releaseNonNull());
        EXPECT_EQ(1U, rawValue->refCount());
        auto* rawValue2 = value2.get();
        WebCore::Length lengthF(value2.releaseNonNull());
        EXPECT_EQ(1U, rawValue2->refCount());

        lengthE = lengthF;
        EXPECT_EQ(1U, deletionCount);
        EXPECT_EQ(1U, rawValue2->refCount());
    }

    EXPECT_EQ(2U, deletionCount);
    deletionCount = 0;

    value = createTestValue();
    value2 = createTestValue();

    EXPECT_EQ(1U, value->refCount());
    EXPECT_EQ(1U, value2->refCount());

    {
        auto* rawValue = value.get();
        WebCore::Length lengthG(value.releaseNonNull());
        EXPECT_EQ(1U, rawValue->refCount());
        auto* rawValue2 = value2.get();
        WebCore::Length lengthH(value2.releaseNonNull());
        EXPECT_EQ(1U, rawValue2->refCount());

        lengthG = WTFMove(lengthH);
        EXPECT_EQ(1U, deletionCount);
        EXPECT_EQ(1U, rawValue2->refCount());
    }

    EXPECT_EQ(2U, deletionCount);
    deletionCount = 0;
}

}