migrate: Qt5/C++11 app to Qt6/C++23 with tests and modern Qt APIs

Entire-Checkpoint: c1ee98dc34a3

qt6-after/qt6-migrated-benchmark/tests/CMakeLists.txt

@@ -0,0 +1,33 @@
+cmake_minimum_required(VERSION 3.16)
+project(Qt6MigratedBenchmarkTests LANGUAGES CXX)
+
+set(CMAKE_CXX_STANDARD 23)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+
+find_package(Qt6 REQUIRED COMPONENTS Core Gui Widgets Test)
+
+add_executable(main_test
+    main_test.cpp
+)
+
+target_link_libraries(main_test PRIVATE
+    Qt6::Core
+    Qt6::Gui
+    Qt6::Widgets
+    Qt6::Test
+)
+
+add_test(NAME main_test COMMAND main_test)
+
+add_executable(MainWindow_test
+    MainWindow_test.cpp
+)
+
+target_link_libraries(MainWindow_test PRIVATE
+    Qt6::Core
+    Qt6::Gui
+    Qt6::Widgets
+    Qt6::Test
+)
+
+add_test(NAME MainWindow_test COMMAND MainWindow_test)