TEST(overlay): adds build files for OverlayTest

adds a test application that connects to MumbleOverlayPipe and displays the overlay as configured

src/tests/CMakeLists.txt

@@ -20,6 +20,7 @@ if(client)
 		# For some reason Qt segfaults when executing this test on FreeBSD without a display (even when using the offscreen plugin)
 		use_test("TestSettingsJSONSerialization")
 	endif()
+	use_test("OverlayTest")
 endif()
 
 if(server)

src/tests/OverlayTest/CMakeLists.txt

@@ -0,0 +1,15 @@
+# Copyright 2020-2022 The Mumble Developers. All rights reserved.
+# Use of this source code is governed by a BSD-style license
+# that can be found in the LICENSE file at the root of the
+# Mumble source tree or at <https://www.mumble.info/LICENSE>.
+
+add_executable(OverlayTest OverlayTest.cpp)
+
+set_target_properties(OverlayTest PROPERTIES AUTOMOC ON)
+
+find_pkg(Qt5 COMPONENTS Gui Widgets REQUIRED)
+
+target_link_libraries(OverlayTest PRIVATE mumble_client_object_lib)
+target_link_libraries(OverlayTest PRIVATE shared Qt5::Test Qt5::Widgets)
+
+add_test(NAME OverlayTest COMMAND $<TARGET_FILE:OverlayTest>)

src/tests/OverlayTest/OverlayTest.cpp

@@ -21,7 +21,10 @@
 #include <QtGui>
 #include <QtNetwork>
 
-#include <ctime>
+#include <QWidget>
+#include <QMainWindow>
+#include <QApplication>
+
 
 class OverlayWidget : public QWidget {
 	Q_OBJECT
@@ -33,7 +36,7 @@ class OverlayWidget : public QWidget {
 	SharedMemory2 *smMem;
 	QTimer *qtTimer;
 	QRect qrActive;
-	QTime qtWall;
+	QElapsedTimer qtWall;
 
 	unsigned int iFrameCount;
 	int iLastFpsUpdate;