moc: Add a test for QtMocHelpers

Change-Id: I8a96935cf6c742259c9dfffd17e9a702717a18bf
Reviewed-by: Ahmad Samir <a.samirh78@gmail.com>

tests/auto/tools/CMakeLists.txt

@@ -1,6 +1,8 @@
 # Copyright (C) 2022 The Qt Company Ltd.
 # SPDX-License-Identifier: BSD-3-Clause
 
+add_subdirectory(mochelpers)
+
 # QTBUG-88538
 if(NOT ANDROID AND NOT IOS)
     add_subdirectory(qmakelib)

tests/auto/tools/mochelpers/CMakeLists.txt

@@ -0,0 +1,17 @@
+# Copyright (C) 2024 Intel Corporation.
+# SPDX-License-Identifier: BSD-3-Clause
+
+#####################################################################
+## tst_qmetaenum Test:
+#####################################################################
+
+if(NOT QT_BUILD_STANDALONE_TESTS AND NOT QT_BUILDING_QT)
+    cmake_minimum_required(VERSION 3.16)
+    project(tst_mochelpers LANGUAGES CXX)
+    find_package(Qt6BuildInternals REQUIRED COMPONENTS STANDALONE_TEST)
+endif()
+
+qt_internal_add_test(tst_mochelpers
+    SOURCES
+        tst_mochelpers.cpp
+)

tests/auto/tools/mochelpers/tst_mochelpers.cpp

@@ -0,0 +1,50 @@
+// Copyright (C) 2024 Intel Corporation.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
+
+// Testing qtmochelpers.h is probably pointless... if there's a problem with it
+// then you most likely can't compile this test in the first place.
+#include <QtCore/qtmochelpers.h>
+
+#include <QTest>
+
+#include <QtCore/qobject.h>
+
+#include <initializer_list>
+
+class tst_MocHelpers : public QObject
+{
+    Q_OBJECT
+private slots:
+    void stringData();
+};
+
+template <int Count, size_t StringSize>
+void verifyStringData(const QtMocHelpers::StringData<Count, StringSize> &data,
+                      std::initializer_list<const char *> strings)
+{
+    QCOMPARE(std::size(strings), size_t(Count) / 2);
+    ptrdiff_t i = 0;
+    for (const char *str : strings) {
+        uint offset = data.offsetsAndSizes[i++] - sizeof(data.offsetsAndSizes);
+        uint len = data.offsetsAndSizes[i++];
+        QByteArrayView result(data.stringdata0 + offset, len);
+
+        QCOMPARE(len, strlen(str));
+        QCOMPARE(result, str);
+    }
+}
+
+void tst_MocHelpers::stringData()
+{
+#define CHECK(...)  \
+    verifyStringData(QtMocHelpers::stringData(__VA_ARGS__), { __VA_ARGS__ })
+
+    QTest::setThrowOnFail(true);
+    CHECK("Hello");
+    CHECK("Hello", "World");
+    CHECK("Hello", "", "World");
+#undef CHECK
+}
+
+QTEST_MAIN(tst_MocHelpers)
+#include "tst_mochelpers.moc"