tst_QPointer: add checks for CTAD

No pathological findings :)

Pick-to: 6.2
Change-Id: Ifbbca223a5e612e7abb67c0364d4354a9d8174e3
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
(cherry picked from commit 1cf0f8e7c3feb923ff08247d83d185c6aea986eb)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
(cherry picked from commit e4f5d86f88a5345257964bf4db56520d852ead83)

1 files changed, 42 insertions, 0 deletions

diff --git a/tests/auto/corelib/kernel/qpointer/tst_qpointer.cpp b/tests/auto/corelib/kernel/qpointer/tst_qpointer.cpp
index 4705ff0756..ca87aa03c0 100644
--- a/tests/auto/corelib/kernel/qpointer/tst_qpointer.cpp
+++ b/tests/auto/corelib/kernel/qpointer/tst_qpointer.cpp
@@ -19,6 +19,7 @@ public:
 
 private slots:
     void constructors();
+    void ctad();
     void destructor();
     void assignment_operators();
     void equality_operators();
@@ -48,6 +49,47 @@ void tst_QPointer::constructors()
     QCOMPARE(p3, QPointer<QObject>(this));
 }
 
+void tst_QPointer::ctad()
+{
+
+    {
+        QObject o;
+        QPointer po = &o;
+        static_assert(std::is_same_v<decltype(po), QPointer<QObject>>);
+        QPointer poc = po;
+        static_assert(std::is_same_v<decltype(poc), QPointer<QObject>>);
+        QPointer pom = std::move(po);
+        static_assert(std::is_same_v<decltype(pom), QPointer<QObject>>);
+    }
+    {
+        const QObject co;
+        QPointer pco = &co;
+        static_assert(std::is_same_v<decltype(pco), QPointer<const QObject>>);
+        QPointer pcoc = pco;
+        static_assert(std::is_same_v<decltype(pcoc), QPointer<const QObject>>);
+        QPointer pcom = std::move(pco);
+        static_assert(std::is_same_v<decltype(pcom), QPointer<const QObject>>);
+    }
+    {
+        QFile f;
+        QPointer pf = &f;
+        static_assert(std::is_same_v<decltype(pf), QPointer<QFile>>);
+        QPointer pfc = pf;
+        static_assert(std::is_same_v<decltype(pfc), QPointer<QFile>>);
+        QPointer pfm = std::move(pf);
+        static_assert(std::is_same_v<decltype(pfm), QPointer<QFile>>);
+    }
+    {
+        const QFile cf;
+        QPointer pcf = &cf;
+        static_assert(std::is_same_v<decltype(pcf), QPointer<const QFile>>);
+        QPointer pcfc = pcf;
+        static_assert(std::is_same_v<decltype(pcfc), QPointer<const QFile>>);
+        QPointer pcfm = std::move(pcf);
+        static_assert(std::is_same_v<decltype(pcfm), QPointer<const QFile>>);
+    }
+}
+
 void tst_QPointer::destructor()
 {
     // Make two QPointer's to the same object