1 files changed, 69 insertions, 0 deletions
diff --git a/tests/auto/widgets/widgets/qtabbar/tst_qtabbar.cpp b/tests/auto/widgets/widgets/qtabbar/tst_qtabbar.cpp
index 79a963f532..f04f803ecf 100644
--- a/tests/auto/widgets/widgets/qtabbar/tst_qtabbar.cpp
+++ b/tests/auto/widgets/widgets/qtabbar/tst_qtabbar.cpp
@@ -98,6 +98,9 @@ private slots:
 
     void mouseReleaseOutsideTabBar();
 
+    void scrollButtons_data();
+    void scrollButtons();
+
 private:
     void checkPositions(const TabBar &tabbar, const QList<int> &positions);
 };
@@ -869,5 +872,71 @@ void tst_QTabBar::checkPositions(const TabBar &tabbar, const QList<int> &positio
     }
 }
 
+void tst_QTabBar::scrollButtons_data()
+{
+    QTest::addColumn<QTabWidget::TabPosition>("tabPosition");
+    QTest::addColumn<Qt::LayoutDirection>("layoutDirection");
+
+    for (auto ld : {Qt::LeftToRight, Qt::RightToLeft}) {
+        const char *ldStr = ld == Qt::LeftToRight ? "LTR" : "RTL";
+        QTest::addRow("North, %s", ldStr) << QTabWidget::North << ld;
+        QTest::addRow("South, %s", ldStr) << QTabWidget::South << ld;
+        QTest::addRow("West, %s", ldStr) << QTabWidget::West << ld;
+        QTest::addRow("East, %s", ldStr) << QTabWidget::East << ld;
+    }
+}
+
+void tst_QTabBar::scrollButtons()
+{
+    QFETCH(QTabWidget::TabPosition, tabPosition);
+    QFETCH(Qt::LayoutDirection, layoutDirection);
+
+    QWidget window;
+    QTabWidget tabWidget(&window);
+    tabWidget.setLayoutDirection(layoutDirection);
+    tabWidget.setTabPosition(tabPosition);
+    tabWidget.setElideMode(Qt::ElideNone);
+    tabWidget.setUsesScrollButtons(true);
+
+    const int tabCount = 5;
+    for (int i = 0; i < tabCount; ++i)
+    {
+        const QString num = QString::number(i);
+        tabWidget.addTab(new QPushButton(num), num + " - Really long tab name to force arrows");
+    }
+    tabWidget.move(0, 0);
+    tabWidget.resize(tabWidget.minimumSizeHint());
+    window.show();
+    QVERIFY(QTest::qWaitForWindowActive(&window));
+
+    auto *leftB = tabWidget.tabBar()->findChild<QAbstractButton*>(QStringLiteral("ScrollLeftButton"));
+    auto *rightB = tabWidget.tabBar()->findChild<QAbstractButton*>(QStringLiteral("ScrollRightButton"));
+
+    QVERIFY(leftB->isVisible());
+    QVERIFY(!leftB->isEnabled());
+    QVERIFY(rightB->isVisible());
+    QVERIFY(rightB->isEnabled());
+    QVERIFY(!tabWidget.tabBar()->tabRect(1).intersects(tabWidget.tabBar()->rect()));
+
+    int index = 0;
+    for (; index < tabWidget.count(); ++index) {
+        QCOMPARE(leftB->isEnabled(), index > 0);
+        QCOMPARE(rightB->isEnabled(), index < tabWidget.count() - 1);
+        QVERIFY(tabWidget.tabBar()->tabRect(index).intersects(tabWidget.tabBar()->rect()));
+        QCOMPARE(tabWidget.tabBar()->tabAt(tabWidget.tabBar()->rect().center()), index);
+        if (rightB->isEnabled())
+            rightB->click();
+    }
+    for (--index; index >= 0; --index) {
+        QCOMPARE(leftB->isEnabled(), index >= 0);
+        QCOMPARE(rightB->isEnabled(), index < tabWidget.count() - 1);
+
+        QVERIFY(tabWidget.tabBar()->tabRect(index).intersects(tabWidget.tabBar()->rect()));
+        if (leftB->isEnabled())
+            leftB->click();
+    }
+    QVERIFY(!leftB->isEnabled());
+}
+
 QTEST_MAIN(tst_QTabBar)
 #include "tst_qtabbar.moc"