autotests/integration: make inputmethodtest more realstic

When text input gets enabled, the sequence should be
1. enable
2. request to show the panel
3. panel gets added and shown

And showing the panel again after hiding is an important case to cover as
well.

autotests/integration/inputmethod_test.cpp

@@ -129,19 +129,18 @@ void InputMethodTest::testOpenClose()
     QSignalSpy frameGeometryChangedSpy(window, &Window::frameGeometryChanged);
     QSignalSpy toplevelConfigureRequestedSpy(shellSurface.get(), &Test::XdgToplevel::configureRequested);
     QSignalSpy surfaceConfigureRequestedSpy(shellSurface->xdgSurface(), &Test::XdgSurface::configureRequested);
+    QVERIFY(surfaceConfigureRequestedSpy.wait());
 
     std::unique_ptr<TextInput> textInput(Test::waylandTextInputManager()->createTextInput(Test::waylandSeat()));
-
     QVERIFY(textInput != nullptr);
-    textInput->enable(surface.get());
-    QVERIFY(surfaceConfigureRequestedSpy.wait());
 
     // Show the keyboard
     touchNow();
-    QSignalSpy paneladded(kwinApp()->inputMethod(), &KWin::InputMethod::panelChanged);
-    QVERIFY(paneladded.wait());
+    textInput->enable(surface.get());
     textInput->showInputPanel();
+    QSignalSpy paneladded(kwinApp()->inputMethod(), &KWin::InputMethod::panelChanged);
     QVERIFY(windowAddedSpy.wait());
+    QCOMPARE(paneladded.count(), 1);
 
     Window *keyboardClient = windowAddedSpy.last().first().value<Window *>();
     QVERIFY(keyboardClient);
@@ -164,6 +163,14 @@ void InputMethodTest::testOpenClose()
 
     QCOMPARE(window->frameGeometry().height(), 1024);
 
+    // show the keyboard again
+    touchNow();
+    textInput->enable(surface.get());
+    textInput->showInputPanel();
+
+    QVERIFY(surfaceConfigureRequestedSpy.wait());
+    QVERIFY(keyboardClient->isShown());
+
     // Destroy the test window.
     shellSurface.reset();
     QVERIFY(Test::waitForWindowDestroyed(window));