Fix crash on signal after deregistration

Implemented a remove method in SignalHandler that allows
us to remove and disconnect an object from SignalHandler
w/o decrementing the connection counter until it hits
zero or deleting the object
That same functionality was used to remove an object from
internal lists when receiving a destroyed signal from an
object. In case of deregistering an object we haven't
received a destoryed signal but simulated reception of that
signal and so that code was not called in that case.

Change-Id: Ie20cf628a2de028375f5d29f913682e25ebf8d44
Reviewed-by: Milian Wolff <milian.wolff@kdab.com>

2 files changed, 25 insertions, 0 deletions

diff --git a/tests/auto/webchannel/tst_webchannel.cpp b/tests/auto/webchannel/tst_webchannel.cpp
index 4827ea7..3304293 100644
--- a/tests/auto/webchannel/tst_webchannel.cpp
+++ b/tests/auto/webchannel/tst_webchannel.cpp
@@ -83,6 +83,30 @@ void TestWebChannel::testRegisterObjects()
     channel.registerObjects(objects);
 }
 
+void TestWebChannel::testDeregisterObjects()
+{
+    QWebChannel channel;
+    TestObject testObject;
+    testObject.setObjectName("myTestObject");
+
+
+    channel.registerObject(testObject.objectName(), &testObject);
+
+    channel.connectTo(m_dummyTransport);
+    channel.d_func()->publisher->initializeClients();
+
+    QJsonObject connectMessage =
+            QJsonDocument::fromJson(("{\"type\": 7,"
+                                    "\"object\": \"myTestObject\","
+                                    "\"signal\": " + QString::number(testObject.metaObject()->indexOfSignal("sig1()"))
+                                    + "}").toLatin1()).object();
+    channel.d_func()->publisher->handleMessage(connectMessage, m_dummyTransport);
+
+    emit testObject.sig1();
+    channel.deregisterObject(&testObject);
+    emit testObject.sig1();
+}
+
 void TestWebChannel::testInfoForObject()
 {
     TestObject obj;
diff --git a/tests/auto/webchannel/tst_webchannel.h b/tests/auto/webchannel/tst_webchannel.h
index ad8c6a4..6564944 100644
--- a/tests/auto/webchannel/tst_webchannel.h
+++ b/tests/auto/webchannel/tst_webchannel.h
@@ -214,6 +214,7 @@ public:
 
 private slots:
     void testRegisterObjects();
+    void testDeregisterObjects();
     void testInfoForObject();
     void testInvokeMethodConversion();
     void testDisconnect();