CMake: clean up test setup

- Remove redundant searches for ECM and Qt::Test, move
   them to top-level.

CMakeLists.txt

@@ -237,6 +237,11 @@ set_package_properties(
 find_package(ECM ${ECM_VERSION} NO_MODULE)
 if( ECM_FOUND )
     set(CMAKE_MODULE_PATH ${ECM_MODULE_PATH} ${CMAKE_MODULE_PATH})
+    if ( BUILD_TESTING )
+        # ECM implies that we can build the tests, too
+        find_package( Qt5 COMPONENTS Test REQUIRED )
+        include( ECMAddTests )
+    endif()
 endif()
 
 find_package( KF5 COMPONENTS CoreAddons Crash )

src/modules/contextualprocess/CMakeLists.txt

@@ -8,10 +8,7 @@ calamares_add_plugin( contextualprocess
     SHARED_LIB
 )
 
-if( ECM_FOUND )
-    find_package( Qt5 COMPONENTS Test REQUIRED )
-    include( ECMAddTests )
-
+if( ECM_FOUND AND BUILD_TESTING )
     ecm_add_test(
             Tests.cpp
             ContextualProcessJob.cpp  # Builds it a second time

src/modules/fsresizer/CMakeLists.txt

@@ -20,10 +20,7 @@ if ( KPMcore_FOUND )
         SHARED_LIB
     )
 
-    if( ECM_FOUND )
-        find_package( Qt5 COMPONENTS Test REQUIRED )
-        include( ECMAddTests )
-
+    if( ECM_FOUND AND BUILD_TESTING )
         ecm_add_test(
                 Tests.cpp
             TEST_NAME

src/modules/locale/CMakeLists.txt

@@ -1,9 +1,3 @@
-find_package(ECM ${ECM_VERSION} NO_MODULE)
-if( ECM_FOUND AND BUILD_TESTING )
-    include( ECMAddTests )
-    find_package( Qt5 COMPONENTS Core Test REQUIRED )
-endif()
-
 # When debugging the timezone widget, add this debugging definition
 # to have a debugging-friendly timezone widget, debug logging,
 # and no intrusive timezone-setting while clicking around.

src/modules/partition/tests/CMakeLists.txt

@@ -1,6 +1,4 @@
-find_package( Qt5 COMPONENTS Gui Test REQUIRED )
-
-include( ECMAddTests )
+find_package( Qt5 COMPONENTS Gui REQUIRED )
 
 set( PartitionModule_SOURCE_DIR .. )
 
@@ -23,13 +21,15 @@ include_directories(
     ${CMAKE_CURRENT_BINARY_DIR}
 )
 
-ecm_add_test( ${partitionjobtests_SRCS}
-    TEST_NAME partitionjobtests
-    LINK_LIBRARIES
-        ${CALAMARES_LIBRARIES}
-        kpmcore
-        Qt5::Core
-        Qt5::Test
-)
+if( ECM_FOUND AND BUILD_TESTING )
+    ecm_add_test( ${partitionjobtests_SRCS}
+        TEST_NAME partitionjobtests
+        LINK_LIBRARIES
+            ${CALAMARES_LIBRARIES}
+            kpmcore
+            Qt5::Core
+            Qt5::Test
+    )
 
-set_target_properties( partitionjobtests PROPERTIES AUTOMOC TRUE )
+    set_target_properties( partitionjobtests PROPERTIES AUTOMOC TRUE )
+endif()

src/modules/shellprocess/CMakeLists.txt

@@ -8,10 +8,7 @@ calamares_add_plugin( shellprocess
     SHARED_LIB
 )
 
-if( ECM_FOUND )
-    find_package( Qt5 COMPONENTS Test REQUIRED )
-    include( ECMAddTests )
-
+if( ECM_FOUND AND BUILD_TESTING )
     ecm_add_test(
             Tests.cpp
         TEST_NAME

src/modules/users/CMakeLists.txt

@@ -1,9 +1,4 @@
-find_package(ECM ${ECM_VERSION} NO_MODULE)
-if( ECM_FOUND )
-    include( ECMAddTests )
-endif()
-
-find_package( Qt5 COMPONENTS Core Test REQUIRED )
+find_package( Qt5 COMPONENTS Core REQUIRED )
 find_package( Crypt REQUIRED )
 
 # Add optional libraries here
@@ -44,7 +39,7 @@ calamares_add_plugin( users
     SHARED_LIB
 )
 
-if( ECM_FOUND )
+if( ECM_FOUND AND BUILD_TESTING )
     ecm_add_test(
             PasswordTests.cpp
             SetPasswordJob.cpp