Add basic QKeyEvent auto-test

Change-Id: I732723389edf0970e9688966407c728d38538d0a
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@theqtcompany.com>

tests/auto/gui/kernel/kernel.pro

@@ -11,6 +11,7 @@ SUBDIRS=\
    qguitimer \
    qguivariant \
    qinputmethod \
+   qkeyevent \
    qkeysequence \
    qmouseevent \
    qmouseevent_modal \

tests/auto/gui/kernel/qkeyevent/qkeyevent.pro

@@ -0,0 +1,4 @@
+CONFIG += testcase
+TARGET = tst_qkeyevent
+SOURCES += tst_qkeyevent.cpp
+QT = core gui testlib

tests/auto/gui/kernel/qkeyevent/tst_qkeyevent.cpp

@@ -0,0 +1,189 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL21$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see http://www.qt.io/terms-conditions. For further
+** information use the contact form at http://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 or version 3 as published by the Free
+** Software Foundation and appearing in the file LICENSE.LGPLv21 and
+** LICENSE.LGPLv3 included in the packaging of this file. Please review the
+** following information to ensure the GNU Lesser General Public License
+** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
+** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** As a special exception, The Qt Company gives you certain additional
+** rights. These rights are described in The Qt Company LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtTest/QtTest>
+
+#include <QtCore/qcoreapplication.h>
+#include <QtGui/qevent.h>
+#include <QtGui/qwindow.h>
+
+class Window : public QWindow
+{
+public:
+    ~Window() { reset(); }
+
+    void keyPressEvent(QKeyEvent *event) { recordEvent(event); }
+    void keyReleaseEvent(QKeyEvent *event) { recordEvent(event); }
+
+    void reset() {
+        qDeleteAll(keyEvents.begin(), keyEvents.end());
+        keyEvents.clear();
+    }
+private:
+    void recordEvent(QKeyEvent *event) {
+        keyEvents.append(new QKeyEvent(event->type(), event->key(), event->modifiers(), event->nativeScanCode(),
+            event->nativeVirtualKey(), event->nativeModifiers(), event->text(),
+            event->isAutoRepeat(), event->count()));
+    }
+
+public:
+    QVector<QKeyEvent*> keyEvents;
+};
+
+class tst_QKeyEvent : public QObject
+{
+    Q_OBJECT
+public:
+    tst_QKeyEvent();
+    ~tst_QKeyEvent();
+
+private slots:
+    void basicEventDelivery();
+    void modifiers_data();
+    void modifiers();
+};
+
+tst_QKeyEvent::tst_QKeyEvent()
+{
+}
+
+tst_QKeyEvent::~tst_QKeyEvent()
+{
+}
+
+void tst_QKeyEvent::basicEventDelivery()
+{
+    Window window;
+    window.showNormal();
+    QVERIFY(QTest::qWaitForWindowExposed(&window));
+
+    const Qt::Key key = Qt::Key_A;
+    const Qt::KeyboardModifier modifiers = Qt::NoModifier;
+
+    QTest::keyClick(&window, key, modifiers);
+
+    QCOMPARE(window.keyEvents.size(), 2);
+    QCOMPARE(window.keyEvents.first()->type(), QKeyEvent::KeyPress);
+    QCOMPARE(window.keyEvents.last()->type(), QKeyEvent::KeyRelease);
+    foreach (const QKeyEvent *event, window.keyEvents) {
+        QCOMPARE(Qt::Key(event->key()), key);
+        QCOMPARE(Qt::KeyboardModifiers(event->modifiers()), modifiers);
+    }
+}
+
+static bool orderByModifier(const QVector<int> &v1, const QVector<int> &v2)
+{
+    if (v1.size() != v2.size())
+        return v1.size() < v2.size();
+
+    for (int i = 0; i < qMin(v1.size(), v2.size()); ++i) {
+        if (v1.at(i) == v2.at(i))
+            continue;
+
+        return v1.at(i) < v2.at(i);
+    }
+
+    return true;
+}
+
+void tst_QKeyEvent::modifiers_data()
+{
+    struct Modifier
+    {
+        Qt::Key key;
+        Qt::KeyboardModifier modifier;
+    };
+    static const Modifier modifiers[] = {
+        { Qt::Key_Shift, Qt::ShiftModifier },
+        { Qt::Key_Control, Qt::ControlModifier },
+        { Qt::Key_Alt, Qt::AltModifier },
+        { Qt::Key_Meta, Qt::MetaModifier },
+    };
+
+    QVector<QVector<int>> modifierCombinations;
+
+    // Generate powerset (minus the empty set) of possible modifier combinations
+    static const int kNumModifiers = sizeof(modifiers) / sizeof(Modifier);
+    for (quint64 bitmask = 1; bitmask < (1 << kNumModifiers) ; ++bitmask) {
+        QVector<int> modifierCombination;
+        for (quint64 modifier = 0; modifier < kNumModifiers; ++modifier) {
+            if (bitmask & (1 << modifier))
+                modifierCombination.append(modifier);
+        }
+        modifierCombinations.append(modifierCombination);
+    }
+
+    qSort(modifierCombinations.begin(), modifierCombinations.end(), orderByModifier);
+
+    QTest::addColumn<Qt::KeyboardModifiers>("modifiers");
+    foreach (const QVector<int> combination, modifierCombinations) {
+        int keys[4] = {};
+        Qt::KeyboardModifiers mods;
+        for (int i = 0; i < combination.size(); ++i) {
+            Modifier modifier = modifiers[combination.at(i)];
+            keys[i] = modifier.key;
+            mods |= modifier.modifier;
+        }
+        QKeySequence keySequence(keys[0], keys[1], keys[2], keys[3]);
+        QTest::newRow(keySequence.toString(QKeySequence::NativeText).toUtf8().constData()) << mods;
+    }
+}
+
+void tst_QKeyEvent::modifiers()
+{
+    Window window;
+    window.showNormal();
+    QVERIFY(QTest::qWaitForWindowExposed(&window));
+
+    const Qt::Key key = Qt::Key_A;
+    QFETCH(Qt::KeyboardModifiers, modifiers);
+
+    QTest::keyClick(&window, key, modifiers);
+
+    int numKeys = qPopulationCount(quint64(modifiers)) + 1;
+    QCOMPARE(window.keyEvents.size(), numKeys * 2);
+
+    for (int i = 0; i < window.keyEvents.size(); ++i) {
+        const QKeyEvent *event = window.keyEvents.at(i);
+        QCOMPARE(event->type(), i < numKeys ? QKeyEvent::KeyPress : QKeyEvent::KeyRelease);
+        if (i == numKeys - 1 || i == numKeys) {
+            QCOMPARE(Qt::Key(event->key()), key);
+            QCOMPARE(event->modifiers(), modifiers);
+        } else {
+            QVERIFY(Qt::Key(event->key()) != key);
+        }
+    }
+}
+
+QTEST_MAIN(tst_QKeyEvent)
+#include "tst_qkeyevent.moc"