diff options
| -rw-r--r-- | tests/auto/widgets/qwebengineview/tst_qwebengineview.cpp | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/tests/auto/widgets/qwebengineview/tst_qwebengineview.cpp b/tests/auto/widgets/qwebengineview/tst_qwebengineview.cpp index b1b80ce5c..f4ff364a2 100644 --- a/tests/auto/widgets/qwebengineview/tst_qwebengineview.cpp +++ b/tests/auto/widgets/qwebengineview/tst_qwebengineview.cpp @@ -187,6 +187,7 @@ private Q_SLOTS: void navigateOnDrop(); void datalist(); void longKeyEventText(); + void pageWithPaintListeners(); }; // This will be called before the first test function is executed. @@ -212,6 +213,95 @@ void tst_QWebEngineView::cleanup() QTRY_COMPARE(QApplication::topLevelWidgets().size(), 0); } +class PageWithPaintListeners : public QWebEnginePage +{ + Q_OBJECT +public: + PageWithPaintListeners(QObject *parent = nullptr) : QWebEnginePage(parent) + { + addFirstContentfulPaintListener(); + addLargestContentfulPaintListener(); + } + + void javaScriptConsoleMessage(JavaScriptConsoleMessageLevel level, const QString &message, + int lineNumber, const QString &sourceID) override + { + Q_UNUSED(level) + Q_UNUSED(lineNumber) + Q_UNUSED(sourceID) + if (message.contains("firstContentfulPaint")) + emit firstContentfulPaint(); + if (message.contains("largestContentfulPaint")) + emit largestContentfulPaint(); + } + + // https://developer.mozilla.org/en-US/docs/Web/API/PerformanceObserver + void addFirstContentfulPaintListener() + { + QObject::connect(this, &QWebEnginePage::loadFinished, [this]() { + runJavaScript(QStringLiteral( + "new PerformanceObserver((entryList) => {" + " if (entryList.getEntriesByType('first-contentful-paint'))" + " console.log('firstContentfulPaint');" + "}).observe({type: 'paint', buffered: true});")); + }); + } + + void addLargestContentfulPaintListener() + { + QObject::connect(this, &QWebEnginePage::loadFinished, [this]() { + runJavaScript(QStringLiteral( + "new PerformanceObserver((entryList) => {" + " console.log('largestContentfulPaint');" + "}).observe({type: 'largest-contentful-paint', buffered: true});")); + }); + } + +signals: + void firstContentfulPaint(); // https://web.dev/articles/fcp + void largestContentfulPaint(); // https://web.dev/articles/lcp +}; + +void tst_QWebEngineView::pageWithPaintListeners() +{ + PageWithPaintListeners page; + + QSignalSpy firstContentfulPaintSpy(&page, &PageWithPaintListeners::firstContentfulPaint); + QSignalSpy largestContentfulPaintSpy(&page, &PageWithPaintListeners::largestContentfulPaint); + + const QString empty = + QStringLiteral("<html><body style='width:100x;height:100px;'></body></html>"); + const QString scrollBars = + QStringLiteral("<html><body style='width:1000px;height:1000px;'></body></html>"); + const QString backgroundColor = + QStringLiteral("<html><body style='background-color:green'></body></html>"); + const QString text = QStringLiteral("<html><body>text</body></html>"); + + QWebEngineView view; + view.setPage(&page); + view.resize(600, 600); + view.show(); + QVERIFY(QTest::qWaitForWindowExposed(&view)); + + page.setHtml(empty); + QTest::qWait(500); // empty page should not trigger + QVERIFY(firstContentfulPaintSpy.size() == 0); + QVERIFY(largestContentfulPaintSpy.size() == 0); + + page.setHtml(backgroundColor); + QTRY_VERIFY(firstContentfulPaintSpy.size() == 1); + + page.setHtml(text); + QTRY_VERIFY(firstContentfulPaintSpy.size() == 2); + QTRY_VERIFY(largestContentfulPaintSpy.size() == 1); + +#if !QT_CONFIG(webengine_embedded_build) + // Embedded builds have different scrollbars that are only painted on hover + page.setHtml(scrollBars); + QTRY_VERIFY(firstContentfulPaintSpy.size() == 3); +#endif +} + void tst_QWebEngineView::renderHints() { #if !defined(QWEBENGINEVIEW_RENDERHINTS) @@ -698,14 +788,18 @@ void tst_QWebEngineView::horizontalScrollbarTest() "</body></html>"); QWebEngineView view; + PageWithPaintListeners page; + view.setPage(&page); view.setFixedSize(600, 600); view.show(); QVERIFY(QTest::qWaitForWindowExposed(&view)); + QSignalSpy firstPaintSpy(&page, &PageWithPaintListeners::firstContentfulPaint); QSignalSpy loadSpy(view.page(), SIGNAL(loadFinished(bool))); view.setHtml(html); QTRY_COMPARE(loadSpy.size(), 1); + QTRY_COMPARE(firstPaintSpy.size(), 1); QVERIFY(view.page()->scrollPosition() == QPoint(0, 0)); QSignalSpy scrollSpy(view.page(), SIGNAL(scrollPositionChanged(QPointF))); |