qt5base-lts/tests/auto/gui/kernel/qpalette/tst_qpalette.cpp

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** This file is part of the test suite of the Qt Toolkit.
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#include <QtTest/QtTest>

#include "qpalette.h"

class tst_QPalette : public QObject
{
    Q_OBJECT
private Q_SLOTS:
    void roleValues_data();
    void roleValues();
    void copySemantics();
    void moveSemantics();
    void setBrush();
};

void tst_QPalette::roleValues_data()
{
    QTest::addColumn<int>("role");
    QTest::addColumn<int>("value");

    QTest::newRow("QPalette::WindowText") << int(QPalette::WindowText) << 0;
    QTest::newRow("QPalette::Button") << int(QPalette::Button) << 1;
    QTest::newRow("QPalette::Light") << int(QPalette::Light) << 2;
    QTest::newRow("QPalette::Midlight") << int(QPalette::Midlight) << 3;
    QTest::newRow("QPalette::Dark") << int(QPalette::Dark) << 4;
    QTest::newRow("QPalette::Mid") << int(QPalette::Mid) << 5;
    QTest::newRow("QPalette::Text") << int(QPalette::Text) << 6;
    QTest::newRow("QPalette::BrightText") << int(QPalette::BrightText) << 7;
    QTest::newRow("QPalette::ButtonText") << int(QPalette::ButtonText) << 8;
    QTest::newRow("QPalette::Base") << int(QPalette::Base) << 9;
    QTest::newRow("QPalette::Window") << int(QPalette::Window) << 10;
    QTest::newRow("QPalette::Shadow") << int(QPalette::Shadow) << 11;
    QTest::newRow("QPalette::Highlight") << int(QPalette::Highlight) << 12;
    QTest::newRow("QPalette::HighlightedText") << int(QPalette::HighlightedText) << 13;
    QTest::newRow("QPalette::Link") << int(QPalette::Link) << 14;
    QTest::newRow("QPalette::LinkVisited") << int(QPalette::LinkVisited) << 15;
    QTest::newRow("QPalette::AlternateBase") << int(QPalette::AlternateBase) << 16;
    QTest::newRow("QPalette::NoRole") << int(QPalette::NoRole) << 17;
    QTest::newRow("QPalette::ToolTipBase") << int(QPalette::ToolTipBase) << 18;
    QTest::newRow("QPalette::ToolTipText") << int(QPalette::ToolTipText) << 19;

    // Change this value as you add more roles.
    QTest::newRow("QPalette::NColorRoles") << int(QPalette::NColorRoles) << 20;
}

void tst_QPalette::roleValues()
{
    QFETCH(int, role);
    QFETCH(int, value);
    QCOMPARE(role, value);
}

void tst_QPalette::copySemantics()
{
    QPalette src(Qt::red), dst;
    const QPalette control = src; // copy construction
    QVERIFY(src != dst);
    QVERIFY(!src.isCopyOf(dst));
    QCOMPARE(src, control);
    QVERIFY(src.isCopyOf(control));
    dst = src; // copy assignment
    QCOMPARE(dst, src);
    QCOMPARE(dst, control);
    QVERIFY(dst.isCopyOf(src));

    dst = QPalette(Qt::green);
    QVERIFY(dst != src);
    QVERIFY(dst != control);
    QCOMPARE(src, control);
    QVERIFY(!dst.isCopyOf(src));
    QVERIFY(src.isCopyOf(control));
}

void tst_QPalette::moveSemantics()
{
#ifdef Q_COMPILER_RVALUE_REFS
    QPalette src(Qt::red), dst;
    const QPalette control = src;
    QVERIFY(src != dst);
    QCOMPARE(src, control);
    QVERIFY(!dst.isCopyOf(src));
    QVERIFY(!dst.isCopyOf(control));
    dst = qMove(src); // move assignment
    QVERIFY(!dst.isCopyOf(src)); // isCopyOf() works on moved-from palettes, too
    QVERIFY(dst.isCopyOf(control));
    QCOMPARE(dst, control);
    src = control; // check moved-from 'src' can still be assigned to (doesn't crash)
    QVERIFY(src.isCopyOf(dst));
    QVERIFY(src.isCopyOf(control));
    QPalette dst2(qMove(src)); // move construction
    QVERIFY(!src.isCopyOf(dst));
    QVERIFY(!src.isCopyOf(dst2));
    QVERIFY(!src.isCopyOf(control));
    QCOMPARE(dst2, control);
    QVERIFY(dst2.isCopyOf(dst));
    QVERIFY(dst2.isCopyOf(control));
    // check moved-from 'src' can still be destroyed (doesn't crash)
#else
    QSKIP("Compiler doesn't support C++11 move semantics");
#endif
}

void tst_QPalette::setBrush()
{
    QPalette p(Qt::red);
    const QPalette q = p;
    QVERIFY(q.isCopyOf(p));

    // Setting a different brush will detach
    p.setBrush(QPalette::Disabled, QPalette::Button, Qt::green);
    QVERIFY(!q.isCopyOf(p));
    QVERIFY(q != p);

    // Check we only changed what we said we would
    for (int i = 0; i < QPalette::NColorGroups; i++)
        for (int j = 0; j < QPalette::NColorRoles; j++) {
            const auto g = QPalette::ColorGroup(i);
            const auto r = QPalette::ColorRole(j);
            const auto b = p.brush(g, r);
            if (g == QPalette::Disabled && r == QPalette::Button)
                QCOMPARE(b, QBrush(Qt::green));
            else
                QCOMPARE(b, q.brush(g, r));
        }

    const QPalette pp = p;
    QVERIFY(pp.isCopyOf(p));
    // Setting the same brush won't detach
    p.setBrush(QPalette::Disabled, QPalette::Button, Qt::green);
    QVERIFY(pp.isCopyOf(p));
}

QTEST_MAIN(tst_QPalette)
#include "tst_qpalette.moc"