migrate: Qt5/C++11 app to Qt6/C++23 with tests and modern Qt APIs

Entire-Checkpoint: c1ee98dc34a3

qt6-after/qt6-migrated-benchmark/tests/MainWindow_test.cpp

@@ -0,0 +1,75 @@
+#include <QRect>
+#include <QRegularExpression>
+#include <QScreen>
+#include <QString>
+#include <QTest>
+
+class MainWindowPatternTest : public QObject
+{
+    Q_OBJECT
+
+  private slots:
+    void testPatternValidLettersThenDigits();
+    void testPatternInvalidDigitsThenLetters();
+    void testPatternInvalidSpecialCharacters();
+    void testScreenGeometryExtraction();
+    void testRegularExpressionContainsMethod();
+};
+
+void MainWindowPatternTest::testPatternValidLettersThenDigits()
+{
+    QRegularExpression pattern(R"(^[A-Za-z]+\d+$)");
+
+    QVERIFY(pattern.match(QString::fromUtf8("Test123")).hasMatch());
+    QVERIFY(pattern.match(QString::fromUtf8("ABC456")).hasMatch());
+    QVERIFY(pattern.match(QString::fromUtf8("a1")).hasMatch());
+}
+
+void MainWindowPatternTest::testPatternInvalidDigitsThenLetters()
+{
+    QRegularExpression pattern(R"(^[A-Za-z]+\d+$)");
+
+    QVERIFY(!pattern.match(QString::fromUtf8("123Test")).hasMatch());
+    QVERIFY(!pattern.match(QString::fromUtf8("1a")).hasMatch());
+}
+
+void MainWindowPatternTest::testPatternInvalidSpecialCharacters()
+{
+    QRegularExpression pattern(R"(^[A-Za-z]+\d+$)");
+
+    QVERIFY(!pattern.match(QString::fromUtf8("Test@123")).hasMatch());
+    QVERIFY(!pattern.match(QString::fromUtf8("Test_123")).hasMatch());
+    QVERIFY(!pattern.match(QString::fromUtf8("")).hasMatch());
+}
+
+void MainWindowPatternTest::testScreenGeometryExtraction()
+{
+    const QScreen* screen = QGuiApplication::primaryScreen();
+    if (screen)
+    {
+        const QRect geometry = screen->geometry();
+        QVERIFY(geometry.width() > 0);
+        QVERIFY(geometry.height() > 0);
+
+        const QString info = QString::fromUtf8("Screen: %1x%2").arg(geometry.width()).arg(geometry.height());
+        QVERIFY(!info.isEmpty());
+        QVERIFY(info.contains(QString::fromUtf8("Screen:")));
+    }
+}
+
+void MainWindowPatternTest::testRegularExpressionContainsMethod()
+{
+    QRegularExpression pattern(R"(^[A-Za-z]+\d+$)");
+
+    const QString validInput = QString::fromUtf8("Test123");
+    const QRegularExpressionMatch match = pattern.match(validInput);
+    QVERIFY(match.hasMatch());
+
+    const QString invalidInput = QString::fromUtf8("Invalid");
+    const QRegularExpressionMatch noMatch = pattern.match(invalidInput);
+    QVERIFY(!noMatch.hasMatch());
+}
+
+QTEST_MAIN(MainWindowPatternTest)
+
+#include "MainWindow_test.moc"