QtDBus: finish all pending call with error if disconnected

libdbus will send a local signal if connection gets disconnected. When
this happens, end all pending calls with QDBusError::Disconnected.

Task-number: QTBUG-51649
Change-Id: I5c7d2a468bb5da746d0c0e53e458c1e376f186a9
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

2 files changed, 22 insertions, 0 deletions

diff --git a/tests/auto/dbus/qdbusconnection/tst_qdbusconnection.cpp b/tests/auto/dbus/qdbusconnection/tst_qdbusconnection.cpp
index e91f87d6c8..f378091c58 100644
--- a/tests/auto/dbus/qdbusconnection/tst_qdbusconnection.cpp
+++ b/tests/auto/dbus/qdbusconnection/tst_qdbusconnection.cpp
@@ -1218,6 +1218,27 @@ void tst_QDBusConnection::callVirtualObjectLocal()
     QCOMPARE(obj.replyArguments, subPathReply.arguments());
 }
 
+void tst_QDBusConnection::pendingCallWhenDisconnected()
+{
+    if (!QCoreApplication::instance())
+        QSKIP("Test requires a QCoreApplication");
+
+    QDBusServer *server = new QDBusServer;
+    QDBusConnection con = QDBusConnection::connectToPeer(server->address(), "disconnect");
+    QTestEventLoop::instance().enterLoop(2);
+    QVERIFY(con.isConnected());
+    QDBusMessage message = QDBusMessage::createMethodCall("", "/", QString(), "method");
+    QDBusPendingCall reply = con.asyncCall(message);
+
+    delete server;
+
+    QTestEventLoop::instance().enterLoop(2);
+    QVERIFY(!con.isConnected());
+    QVERIFY(reply.isFinished());
+    QVERIFY(reply.isError());
+    QVERIFY(reply.error().type() == QDBusError::Disconnected);
+}
+
 QString MyObject::path;
 QString MyObjectWithoutInterface::path;
 QString MyObjectWithoutInterface::interface;
diff --git a/tests/auto/dbus/qdbusconnection/tst_qdbusconnection.h b/tests/auto/dbus/qdbusconnection/tst_qdbusconnection.h
index a53ba320f8..720e484cc2 100644
--- a/tests/auto/dbus/qdbusconnection/tst_qdbusconnection.h
+++ b/tests/auto/dbus/qdbusconnection/tst_qdbusconnection.h
@@ -121,6 +121,7 @@ private slots:
     void registerVirtualObject();
     void callVirtualObject();
     void callVirtualObjectLocal();
+    void pendingCallWhenDisconnected();
 
 public:
     QString serviceName() const { return "org.qtproject.Qt.Autotests.QDBusConnection"; }