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-rw-r--r--src/testlib/doc/src/qttestlib-manual.qdoc5
-rw-r--r--src/testlib/qtest.h32
2 files changed, 37 insertions, 0 deletions
diff --git a/src/testlib/doc/src/qttestlib-manual.qdoc b/src/testlib/doc/src/qttestlib-manual.qdoc
index 71b4541313..65836d0706 100644
--- a/src/testlib/doc/src/qttestlib-manual.qdoc
+++ b/src/testlib/doc/src/qttestlib-manual.qdoc
@@ -107,6 +107,11 @@
Example:
\snippet code/doc_src_qtestlib.cpp 0
+ Finally, if the test class has a static public \c{void initMain()} method,
+ it is called by the QTEST_MAIN macros before the QApplication object
+ is instantiated. For example, this allows for setting application
+ attributes like Qt::AA_DisableHighDpiScaling. This was added in 5.14.
+
For more examples, refer to the \l{Qt Test Tutorial}.
\if !defined(qtforpython)
diff --git a/src/testlib/qtest.h b/src/testlib/qtest.h
index cdf0800371..27fe08e8f4 100644
--- a/src/testlib/qtest.h
+++ b/src/testlib/qtest.h
@@ -379,8 +379,36 @@ inline bool qCompare(quint32 const &t1, quint64 const &t2, const char *actual,
{
return qCompare(static_cast<quint64>(t1), t2, actual, expected, file, line);
}
+namespace Internal {
+template <typename T>
+class HasInitMain // SFINAE test for the presence of initMain()
+{
+private:
+ using YesType = char[1];
+ using NoType = char[2];
+
+ template <typename C> static YesType& test( decltype(&C::initMain) ) ;
+ template <typename C> static NoType& test(...);
+
+public:
+ enum { value = sizeof(test<T>(nullptr)) == sizeof(YesType) };
+};
+
+template<typename T>
+typename std::enable_if<HasInitMain<T>::value, void>::type callInitMain()
+{
+ T::initMain();
+}
+
+template<typename T>
+typename std::enable_if<!HasInitMain<T>::value, void>::type callInitMain()
+{
}
+
+} // namespace Internal
+
+} // namespace QTest
QT_END_NAMESPACE
#ifdef QT_TESTCASE_BUILDDIR
@@ -441,6 +469,7 @@ int main(int argc, char *argv[]) \
#define QTEST_MAIN_IMPL(TestObject) \
TESTLIB_SELFCOVERAGE_START(#TestObject) \
+ QT_PREPEND_NAMESPACE(QTest::Internal::callInitMain)<TestObject>(); \
QApplication app(argc, argv); \
app.setAttribute(Qt::AA_Use96Dpi, true); \
QTEST_DISABLE_KEYPAD_NAVIGATION \
@@ -454,6 +483,7 @@ int main(int argc, char *argv[]) \
#define QTEST_MAIN_IMPL(TestObject) \
TESTLIB_SELFCOVERAGE_START(#TestObject) \
+ QT_PREPEND_NAMESPACE(QTest::Internal::callInitMain)<TestObject>(); \
QGuiApplication app(argc, argv); \
app.setAttribute(Qt::AA_Use96Dpi, true); \
TestObject tc; \
@@ -464,6 +494,7 @@ int main(int argc, char *argv[]) \
#define QTEST_MAIN_IMPL(TestObject) \
TESTLIB_SELFCOVERAGE_START(#TestObject) \
+ QT_PREPEND_NAMESPACE(QTest::Internal::callInitMain)<TestObject>(); \
QCoreApplication app(argc, argv); \
app.setAttribute(Qt::AA_Use96Dpi, true); \
TestObject tc; \
@@ -482,6 +513,7 @@ int main(int argc, char *argv[]) \
int main(int argc, char *argv[]) \
{ \
TESTLIB_SELFCOVERAGE_START(#TestObject) \
+ QT_PREPEND_NAMESPACE(QTest::Internal::callInitMain)<TestObject>(); \
QCoreApplication app(argc, argv); \
app.setAttribute(Qt::AA_Use96Dpi, true); \
TestObject tc; \