Introduce QSignalSpy constructor allows to spy on a meta method

This functionality is especially convenient if meta-object system is
heavily used in a test. For example, if you need to test a bunch of
signals based on their names and/or argument types.

Change-Id: I09a4ecbbd3d0859b5fd466d9dde7679804eb7614
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>

1 files changed, 10 insertions, 0 deletions

diff --git a/src/testlib/qsignalspy.h b/src/testlib/qsignalspy.h
index 91c2d139a8..dc0c58044f 100644
--- a/src/testlib/qsignalspy.h
+++ b/src/testlib/qsignalspy.h
@@ -118,6 +118,16 @@ public:
     }
 #endif // Q_CLANG_QDOC
 
+    QSignalSpy(const QObject *obj, const QMetaMethod &signal)
+        : m_waiting(false)
+    {
+        if (isObjectValid(obj) && isSignalMetaMethodValid(signal) &&
+            connectToSignal(obj, signal.methodIndex())) {
+            sig = signal.methodSignature();
+            initArgs(signal, obj);
+        }
+    }
+
     inline bool isValid() const { return !sig.isEmpty(); }
     inline QByteArray signal() const { return sig; }