Fix spellcheck test flaky failure with misspelled word missing

Work is done asynchronously by chromium SpellChecker object. Therefore
there is no guarantee that on ShowContextMenu event for WebContents there
will be a result with misspelled word.

Change-Id: I2978ed99e4c14f0a7d9086853c5218f82ea1ab60
Reviewed-by: Michal Klocek <[email protected]>

Author: Kirill Burtsev

tests/auto/widgets/spellchecking/tst_spellchecking.cpp

@@ -174,14 +174,41 @@ void tst_Spellchecking::spellcheck()
     QString result = evaluateJavaScriptSync(m_view->page(), "text();").toString();
     QVERIFY(result == text);
 
-    // open menu on misspelled word
-    m_view->activateMenu(m_view->focusWidget(), rect.center());
-    QSignalSpy spyMenuReady(m_view, &WebView::menuReady);
-    QVERIFY(spyMenuReady.wait());
-
-    // check if menu is valid
-    QVERIFY(m_view->data().isValid());
-    QVERIFY(m_view->data().isContentEditable());
+    bool gotMisspelledWord = false; // clumsy QTRY_VERIFY still execs expr after first success
+    QString detail;
+
+    // check that spellchecker has done text processing and filled misspelled word
+    QTRY_VERIFY2([&] () {
+        detail.clear();
+        if (gotMisspelledWord)
+            return true;
+
+        // open menu on misspelled word
+        m_view->activateMenu(m_view->focusWidget(), rect.center());
+        QSignalSpy spyMenuReady(m_view, &WebView::menuReady);
+        if (!spyMenuReady.wait()) {
+            detail = "menu was not shown";
+            return false;
+        }
+
+        if (!m_view->data().isValid()) {
+            detail = "invalid data";
+            return false;
+        }
+
+        if (!m_view->data().isContentEditable()) {
+            detail = "content is not editable";
+            return false;
+        }
+
+        if (m_view->data().misspelledWord().isEmpty()) {
+            detail = "no misspelled word";
+            return false;
+        };
+
+        gotMisspelledWord = true;
+        return true;
+    } (), qPrintable(QString("Context menu: %1").arg(detail)));
 
     // check misspelled word
     QCOMPARE(m_view->data().misspelledWord(), QStringLiteral("lowe"));