Add test case for Seat::destroy

src/wayland/autotests/client/test_wayland_seat.cpp

@@ -53,6 +53,7 @@ private Q_SLOTS:
     void testPointer();
     void testKeyboard();
     void testCast();
+    void testDestroy();
     // TODO: add test for keymap
 
 private:
@@ -518,5 +519,28 @@ void TestWaylandSeat::testCast()
     QCOMPARE((wl_seat*)s2, wlSeat);
 }
 
+void TestWaylandSeat::testDestroy()
+{
+    using namespace KWayland::Client;
+    delete m_compositor;
+    m_compositor = nullptr;
+    connect(m_connection, &ConnectionThread::connectionDied, m_seat, &Seat::destroy);
+    QVERIFY(m_seat->isValid());
+
+    QSignalSpy connectionDiedSpy(m_connection, SIGNAL(connectionDied()));
+    QVERIFY(connectionDiedSpy.isValid());
+    delete m_display;
+    m_display = nullptr;
+    m_compositorInterface = nullptr;
+    m_seatInterface = nullptr;
+    QVERIFY(connectionDiedSpy.wait());
+
+    // now the seat should be destroyed;
+    QVERIFY(!m_seat->isValid());
+
+    // calling destroy again should not fail
+    m_seat->destroy();
+}
+
 QTEST_MAIN(TestWaylandSeat)
 #include "test_wayland_seat.moc"