Disable test dir based on BUILD_TESTING option

CMakeLists.txt

@@ -10,7 +10,7 @@ set(KF5_MIN_VERSION "5.74")
 find_package(ECM ${KF5_MIN_VERSION} REQUIRED NO_MODULE)
 set(CMAKE_MODULE_PATH ${ECM_MODULE_PATH})
 
-find_package(Qt5 ${QT_MIN_VERSION} REQUIRED NO_MODULE COMPONENTS Qml Quick Widgets Test)
+find_package(Qt5 ${QT_MIN_VERSION} REQUIRED NO_MODULE COMPONENTS Qml Quick Widgets)
 find_package(KF5 ${KF5_MIN_VERSION} REQUIRED COMPONENTS CoreAddons I18n Declarative ItemModels Service Plasma Runner)
 
 include(FeatureSummary)

lib/CMakeLists.txt

@@ -39,4 +39,6 @@ install(TARGETS milou EXPORT MilouLibraryTargets ${KDE_INSTALL_TARGETS_DEFAULT_A
 
 add_subdirectory(qml)
 add_subdirectory(previews)
-add_subdirectory(test)
+if (BUILD_TESTING)
+    add_subdirectory(test)
+endif()

lib/test/CMakeLists.txt

+find_package(Qt5 ${REQUIRED_QT_VERSION} CONFIG REQUIRED Test)
 include_directories(
   ${CMAKE_CURRENT_SOURCE_DIR}/..
 )