Refactor KDEInstallDirs tests.

REVIEW: 121646

11 files changed, 242 insertions, 704 deletions

diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index fe160b8c..3b83ca16 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -34,29 +34,52 @@ find_package(Qt5LinguistTools CONFIG)
 add_test_macro(ExecuteCoreModules dummy)
 add_test_macro(ExecuteKDEModules dummy)
 
-add_test_macro(KDEInstallDirsTest.vars_defined dummy)
+add_test_macro(KDEInstallDirsTest.relative_or_absolute dummy)
+add_test_variant(KDEInstallDirsTest.vars_in_sync_no_args
+                 KDEInstallDirsTest.vars_in_sync dummy)
 add_test_macro(KDEInstallDirsTest.not_cache_variable dummy)
 
-add_test_variant(KDEInstallDirsTest.vars_in_sync_no_args
+set(KDEInstallDirsTest.vars_in_sync_kde_arg_EXTRA_OPTIONS
+    --build-options -DKDE_INSTALL_BINDIR=altbin
+                    -DBINDIR_expected_value=altbin
+    )
+add_test_variant(KDEInstallDirsTest.vars_in_sync_kde_arg
                  KDEInstallDirsTest.vars_in_sync dummy)
 
-set(KDEInstallDirsTest.vars_in_sync_args_EXTRA_OPTIONS
-    --build-options -DCMAKE_INSTALL_DATADIR=altdata
-                    -DKDE_INSTALL_BINDIR=altbin
-                    -DLIB_INSTALL_DIR=altlib
+set(KDEInstallDirsTest.vars_in_sync_cmake_arg_EXTRA_OPTIONS
+    --build-options -DCMAKE_INSTALL_BINDIR=altbin
+                    -DBINDIR_expected_value=altbin
     )
-add_test_variant(KDEInstallDirsTest.vars_in_sync_args
+add_test_variant(KDEInstallDirsTest.vars_in_sync_cmake_arg
                  KDEInstallDirsTest.vars_in_sync dummy)
 
-set(KDEInstallDirsTest.usr_vars_defined_EXTRA_OPTIONS
-    --build-options -DCMAKE_INSTALL_PREFIX=/usr)
-add_test_macro(KDEInstallDirsTest.usr_vars_defined dummy)
+set(KDEInstallDirsTest.vars_in_sync_oldstyle_arg_EXTRA_OPTIONS
+    --build-options -DBIN_INSTALL_DIR=altbin
+                    -DBINDIR_expected_value=altbin
+    )
+add_test_variant(KDEInstallDirsTest.vars_in_sync_oldstyle_arg
+                 KDEInstallDirsTest.vars_in_sync dummy)
+
+set(KDEInstallDirsTest.relative_or_absolute_usr_EXTRA_OPTIONS
+    --build-options -DCMAKE_INSTALL_PREFIX=/usr
+                    -DAUTOSTARTDIR_should_be_absolute=TRUE
+                    -DCONFDIR_should_be_absolute=TRUE
+                    -DSYSCONFDIR_should_be_absolute=TRUE
+    )
+add_test_variant(KDEInstallDirsTest.relative_or_absolute_usr
+                 KDEInstallDirsTest.relative_or_absolute dummy)
 
 find_package(Qt5Core QUIET)
 if (TARGET Qt5::qmake)
-    set(KDEInstallDirsTest.qt_vars_defined_EXTRA_OPTIONS
-        --build-options -DKDE_INSTALL_USE_QT_SYS_PATHS=ON)
-    add_test_macro(KDEInstallDirsTest.qt_vars_defined dummy)
+    set(KDEInstallDirsTest.relative_or_absolute_qt_EXTRA_OPTIONS
+        --build-options -DKDE_INSTALL_USE_QT_SYS_PATHS=TRUE
+                        -DPLUGINDIR_should_be_absolute=TRUE
+                        -DQMLDIR_should_be_absolute=TRUE
+                        -DQTPLUGINDIR_should_be_absolute=TRUE
+                        -DQTQUICKIMPORTSDIR_should_be_absolute=TRUE
+        )
+    add_test_variant(KDEInstallDirsTest.relative_or_absolute_qt
+                     KDEInstallDirsTest.relative_or_absolute dummy)
 endif ()
 
 add_test_macro(FindModules dummy)
diff --git a/tests/KDEInstallDirsTest/qt_vars_defined/CMakeLists.txt b/tests/KDEInstallDirsTest/qt_vars_defined/CMakeLists.txt
deleted file mode 100644
index 910a0ede..00000000
--- a/tests/KDEInstallDirsTest/qt_vars_defined/CMakeLists.txt
+++ /dev/null
@@ -1,177 +0,0 @@
-project(KDEInstallDirs.vars_defined)
-cmake_minimum_required(VERSION 2.8.12)
-
-set(ECM_KDE_MODULE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/../../../kde-modules)
-set(ECM_MODULE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/../../../modules)
-set(CMAKE_MODULE_PATH "${ECM_KDE_MODULE_DIR}")
-include(KDEInstallDirs)
-
-set(misc_vars
-    CMAKE_INSTALL_DEFAULT_COMPONENT_NAME
-    INSTALL_TARGETS_DEFAULT_ARGS
-    KF5_INSTALL_TARGETS_DEFAULT_ARGS
-)
-
-set(relative_path_vars
-    # old-style variables
-    AUTOSTART_INSTALL_DIR
-    BIN_INSTALL_DIR
-    CMAKECONFIG_INSTALL_PREFIX
-    CONFIG_INSTALL_DIR
-    DATA_INSTALL_DIR
-    DBUS_INTERFACES_INSTALL_DIR
-    DBUS_SERVICES_INSTALL_DIR
-    DBUS_SYSTEM_SERVICES_INSTALL_DIR
-    EXEC_INSTALL_PREFIX
-    HTML_INSTALL_DIR
-    ICON_INSTALL_DIR
-    INCLUDE_INSTALL_DIR
-    KCFG_INSTALL_DIR
-    KCONF_UPDATE_INSTALL_DIR
-    KF5_DATA_INSTALL_DIR
-    KF5_INCLUDE_INSTALL_DIR
-    KF5_LIBEXEC_INSTALL_DIR
-    KNOTIFYRC_INSTALL_DIR
-    KXMLGUI_INSTALL_DIR
-    LIBEXEC_INSTALL_DIR
-    LIB_INSTALL_DIR
-    LOCALE_INSTALL_DIR
-    MAN_INSTALL_DIR
-    SBIN_INSTALL_DIR
-    SERVICES_INSTALL_DIR
-    SERVICETYPES_INSTALL_DIR
-    SHARE_INSTALL_PREFIX
-    SOUND_INSTALL_DIR
-    SYSCONF_INSTALL_DIR
-    TEMPLATES_INSTALL_DIR
-    WALLPAPER_INSTALL_DIR
-    XDG_APPS_INSTALL_DIR
-    XDG_DIRECTORY_INSTALL_DIR
-    XDG_MIME_INSTALL_DIR
-
-    # new-style variables
-    CMAKE_INSTALL_APPDIR
-    CMAKE_INSTALL_AUTOSTARTDIR
-    CMAKE_INSTALL_BINDIR
-    CMAKE_INSTALL_CMAKEPACKAGEDIR
-    CMAKE_INSTALL_CONFDIR
-    CMAKE_INSTALL_DATADIR
-    CMAKE_INSTALL_DATADIR_KF5
-    CMAKE_INSTALL_DATAROOTDIR
-    CMAKE_INSTALL_DBUSDIR
-    CMAKE_INSTALL_DBUSINTERFACEDIR
-    CMAKE_INSTALL_DBUSSERVICEDIR
-    CMAKE_INSTALL_DBUSSYSTEMSERVICEDIR
-    CMAKE_INSTALL_DESKTOPDIR
-    CMAKE_INSTALL_DOCBUNDLEDIR
-    CMAKE_INSTALL_EXECROOTDIR
-    CMAKE_INSTALL_ICONDIR
-    CMAKE_INSTALL_INCLUDEDIR
-    CMAKE_INSTALL_INCLUDEDIR_KF5
-    CMAKE_INSTALL_INFODIR
-    CMAKE_INSTALL_KCFGDIR
-    CMAKE_INSTALL_KCONFUPDATEDIR
-    CMAKE_INSTALL_KNOTIFY5RCDIR
-    CMAKE_INSTALL_KXMLGUI5DIR
-    CMAKE_INSTALL_KSERVICES5DIR
-    CMAKE_INSTALL_KSERVICETYPES5DIR
-    CMAKE_INSTALL_LIBDIR
-    CMAKE_INSTALL_LIBEXECDIR
-    CMAKE_INSTALL_LIBEXECDIR_KF5
-    CMAKE_INSTALL_LOCALEDIR
-    CMAKE_INSTALL_LOCALSTATEDIR
-    CMAKE_INSTALL_MANDIR
-    CMAKE_INSTALL_MIMEDIR
-    CMAKE_INSTALL_METAINFODIR
-    CMAKE_INSTALL_SBINDIR
-    CMAKE_INSTALL_SHAREDSTATEDIR
-    CMAKE_INSTALL_SOUNDDIR
-    CMAKE_INSTALL_SYSCONFDIR
-    CMAKE_INSTALL_TEMPLATEDIR
-    CMAKE_INSTALL_WALLPAPERDIR
-)
-
-set(absolute_path_vars
-    IMPORTS_INSTALL_DIR
-    PLUGIN_INSTALL_DIR
-    QML_INSTALL_DIR
-    QT_PLUGIN_INSTALL_DIR
-
-    CMAKE_INSTALL_PLUGINDIR
-    CMAKE_INSTALL_QMLDIR
-    CMAKE_INSTALL_QTPLUGINDIR
-    CMAKE_INSTALL_QTQUICKIMPORTSDIR
-
-    CMAKE_INSTALL_FULL_APPDIR
-    CMAKE_INSTALL_FULL_AUTOSTARTDIR
-    CMAKE_INSTALL_FULL_BINDIR
-    CMAKE_INSTALL_FULL_CMAKEPACKAGEDIR
-    CMAKE_INSTALL_FULL_CONFDIR
-    CMAKE_INSTALL_FULL_DATADIR
-    CMAKE_INSTALL_FULL_DATADIR_KF5
-    CMAKE_INSTALL_FULL_DATAROOTDIR
-    CMAKE_INSTALL_FULL_DBUSDIR
-    CMAKE_INSTALL_FULL_DBUSINTERFACEDIR
-    CMAKE_INSTALL_FULL_DBUSSERVICEDIR
-    CMAKE_INSTALL_FULL_DBUSSYSTEMSERVICEDIR
-    CMAKE_INSTALL_FULL_DESKTOPDIR
-    CMAKE_INSTALL_FULL_DOCBUNDLEDIR
-    CMAKE_INSTALL_FULL_EXECROOTDIR
-    CMAKE_INSTALL_FULL_ICONDIR
-    CMAKE_INSTALL_FULL_INCLUDEDIR
-    CMAKE_INSTALL_FULL_INCLUDEDIR_KF5
-    CMAKE_INSTALL_FULL_INFODIR
-    CMAKE_INSTALL_FULL_KCFGDIR
-    CMAKE_INSTALL_FULL_KCONFUPDATEDIR
-    CMAKE_INSTALL_FULL_KNOTIFY5RCDIR
-    CMAKE_INSTALL_FULL_KXMLGUI5DIR
-    CMAKE_INSTALL_FULL_KSERVICES5DIR
-    CMAKE_INSTALL_FULL_KSERVICETYPES5DIR
-    CMAKE_INSTALL_FULL_LIBDIR
-    CMAKE_INSTALL_FULL_LIBEXECDIR
-    CMAKE_INSTALL_FULL_LIBEXECDIR_KF5
-    CMAKE_INSTALL_FULL_LOCALEDIR
-    CMAKE_INSTALL_FULL_LOCALSTATEDIR
-    CMAKE_INSTALL_FULL_MANDIR
-    CMAKE_INSTALL_FULL_MIMEDIR
-    CMAKE_INSTALL_FULL_METAINFODIR
-    CMAKE_INSTALL_FULL_PLUGINDIR
-    CMAKE_INSTALL_FULL_QMLDIR
-    CMAKE_INSTALL_FULL_QTPLUGINDIR
-    CMAKE_INSTALL_FULL_QTQUICKIMPORTSDIR
-    CMAKE_INSTALL_FULL_SBINDIR
-    CMAKE_INSTALL_FULL_SHAREDSTATEDIR
-    CMAKE_INSTALL_FULL_SOUNDDIR
-    CMAKE_INSTALL_FULL_SYSCONFDIR
-    CMAKE_INSTALL_FULL_TEMPLATEDIR
-    CMAKE_INSTALL_FULL_WALLPAPERDIR
-)
-if(APPLE)
-    # The default bundle directory is an absolute path
-    list(APPEND absolute_path_vars
-        BUNDLE_INSTALL_DIR
-        CMAKE_INSTALL_BUNDLEDIR
-        CMAKE_INSTALL_FULL_BUNDLEDIR
-    )
-endif()
-
-foreach(variable ${misc_vars} ${relative_path_vars} ${absolute_path_vars})
-    if(NOT DEFINED ${variable})
-        message(SEND_ERROR "${variable} is not defined.")
-    endif()
-endforeach()
-
-foreach(variable ${relative_path_vars})
-    if(IS_ABSOLUTE ${${variable}})
-        message(SEND_ERROR "${variable} (${${variable}}) should be a relative path, but is absolute.")
-    endif()
-endforeach()
-
-foreach(variable ${absolute_path_vars})
-    if(NOT IS_ABSOLUTE ${${variable}})
-        message(SEND_ERROR "${variable} (${${variable}}) should be an absolute path, but is relative.")
-    endif()
-endforeach()
-
-add_executable(dummy main.c)
-set_target_properties(dummy PROPERTIES RUNTIME_OUTPUT_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
diff --git a/tests/KDEInstallDirsTest/relative_or_absolute/CMakeLists.txt b/tests/KDEInstallDirsTest/relative_or_absolute/CMakeLists.txt
new file mode 100644
index 00000000..1a7a7e7b
--- /dev/null
+++ b/tests/KDEInstallDirsTest/relative_or_absolute/CMakeLists.txt
@@ -0,0 +1,27 @@
+project(KDEInstallDirs.relative_or_absolute)
+cmake_minimum_required(VERSION 2.8.12)
+
+set(ECM_KDE_MODULE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/../../../kde-modules)
+set(ECM_MODULE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/../../../modules)
+set(CMAKE_MODULE_PATH "${ECM_KDE_MODULE_DIR}")
+include(KDEInstallDirs)
+
+include(../var_list.cmake)
+include(../../test_helpers.cmake)
+
+if(APPLE)
+    # The default bundle directory is an absolute path
+    set(BUNDLEDIR_should_be_absolute TRUE)
+endif()
+
+foreach(suffix ${var_suffixes})
+    if(${suffix}_should_be_absolute)
+        assert_var_absolute_path(KDE_INSTALL_${suffix})
+    else()
+        assert_var_relative_path(KDE_INSTALL_${suffix})
+    endif()
+    assert_var_absolute_path(KDE_INSTALL_FULL_${suffix})
+endforeach()
+
+add_executable(dummy main.c)
+set_target_properties(dummy PROPERTIES RUNTIME_OUTPUT_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
diff --git a/tests/KDEInstallDirsTest/qt_vars_defined/main.c b/tests/KDEInstallDirsTest/relative_or_absolute/main.c
index c13815ce..c13815ce 100644
--- a/tests/KDEInstallDirsTest/qt_vars_defined/main.c
+++ b/tests/KDEInstallDirsTest/relative_or_absolute/main.c
diff --git a/tests/KDEInstallDirsTest/usr_vars_defined/CMakeLists.txt b/tests/KDEInstallDirsTest/usr_vars_defined/CMakeLists.txt
deleted file mode 100644
index aea07604..00000000
--- a/tests/KDEInstallDirsTest/usr_vars_defined/CMakeLists.txt
+++ /dev/null
@@ -1,179 +0,0 @@
-# In this test, CMAKE_INSTALL_DIR=/usr
-
-project(KDEInstallDirs.vars_defined)
-cmake_minimum_required(VERSION 2.8.12)
-
-set(ECM_KDE_MODULE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/../../../kde-modules)
-set(ECM_MODULE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/../../../modules)
-set(CMAKE_MODULE_PATH "${ECM_KDE_MODULE_DIR}")
-include(KDEInstallDirs)
-
-set(misc_vars
-    CMAKE_INSTALL_DEFAULT_COMPONENT_NAME
-    INSTALL_TARGETS_DEFAULT_ARGS
-    KF5_INSTALL_TARGETS_DEFAULT_ARGS
-)
-
-set(relative_path_vars
-    # old-style variables
-    BIN_INSTALL_DIR
-    CMAKECONFIG_INSTALL_PREFIX
-    DATA_INSTALL_DIR
-    DBUS_INTERFACES_INSTALL_DIR
-    DBUS_SERVICES_INSTALL_DIR
-    DBUS_SYSTEM_SERVICES_INSTALL_DIR
-    EXEC_INSTALL_PREFIX
-    HTML_INSTALL_DIR
-    ICON_INSTALL_DIR
-    IMPORTS_INSTALL_DIR
-    INCLUDE_INSTALL_DIR
-    KCFG_INSTALL_DIR
-    KCONF_UPDATE_INSTALL_DIR
-    KF5_DATA_INSTALL_DIR
-    KF5_INCLUDE_INSTALL_DIR
-    KF5_LIBEXEC_INSTALL_DIR
-    KNOTIFYRC_INSTALL_DIR
-    KXMLGUI_INSTALL_DIR
-    LIBEXEC_INSTALL_DIR
-    LIB_INSTALL_DIR
-    LOCALE_INSTALL_DIR
-    MAN_INSTALL_DIR
-    PLUGIN_INSTALL_DIR
-    QML_INSTALL_DIR
-    QT_PLUGIN_INSTALL_DIR
-    SBIN_INSTALL_DIR
-    SERVICES_INSTALL_DIR
-    SERVICETYPES_INSTALL_DIR
-    SHARE_INSTALL_PREFIX
-    SOUND_INSTALL_DIR
-    TEMPLATES_INSTALL_DIR
-    WALLPAPER_INSTALL_DIR
-    XDG_APPS_INSTALL_DIR
-    XDG_DIRECTORY_INSTALL_DIR
-    XDG_MIME_INSTALL_DIR
-
-    # new-style variables
-    CMAKE_INSTALL_APPDIR
-    CMAKE_INSTALL_BINDIR
-    CMAKE_INSTALL_CMAKEPACKAGEDIR
-    CMAKE_INSTALL_DATADIR
-    CMAKE_INSTALL_DATADIR_KF5
-    CMAKE_INSTALL_DATAROOTDIR
-    CMAKE_INSTALL_DBUSDIR
-    CMAKE_INSTALL_DBUSINTERFACEDIR
-    CMAKE_INSTALL_DBUSSERVICEDIR
-    CMAKE_INSTALL_DBUSSYSTEMSERVICEDIR
-    CMAKE_INSTALL_DESKTOPDIR
-    CMAKE_INSTALL_DOCBUNDLEDIR
-    CMAKE_INSTALL_EXECROOTDIR
-    CMAKE_INSTALL_ICONDIR
-    CMAKE_INSTALL_INCLUDEDIR
-    CMAKE_INSTALL_INCLUDEDIR_KF5
-    CMAKE_INSTALL_INFODIR
-    CMAKE_INSTALL_KCFGDIR
-    CMAKE_INSTALL_KCONFUPDATEDIR
-    CMAKE_INSTALL_KNOTIFY5RCDIR
-    CMAKE_INSTALL_KXMLGUI5DIR
-    CMAKE_INSTALL_KSERVICES5DIR
-    CMAKE_INSTALL_KSERVICETYPES5DIR
-    CMAKE_INSTALL_LIBDIR
-    CMAKE_INSTALL_LIBEXECDIR
-    CMAKE_INSTALL_LIBEXECDIR_KF5
-    CMAKE_INSTALL_LOCALEDIR
-    CMAKE_INSTALL_LOCALSTATEDIR
-    CMAKE_INSTALL_MANDIR
-    CMAKE_INSTALL_MIMEDIR
-    CMAKE_INSTALL_METAINFODIR
-    CMAKE_INSTALL_PLUGINDIR
-    CMAKE_INSTALL_QMLDIR
-    CMAKE_INSTALL_QTPLUGINDIR
-    CMAKE_INSTALL_QTQUICKIMPORTSDIR
-    CMAKE_INSTALL_SBINDIR
-    CMAKE_INSTALL_SHAREDSTATEDIR
-    CMAKE_INSTALL_SOUNDDIR
-    CMAKE_INSTALL_TEMPLATEDIR
-    CMAKE_INSTALL_WALLPAPERDIR
-)
-
-set(absolute_path_vars
-    AUTOSTART_INSTALL_DIR
-    CONFIG_INSTALL_DIR
-    SYSCONF_INSTALL_DIR
-
-    CMAKE_INSTALL_AUTOSTARTDIR
-    CMAKE_INSTALL_CONFDIR
-    CMAKE_INSTALL_SYSCONFDIR
-
-    CMAKE_INSTALL_FULL_APPDIR
-    CMAKE_INSTALL_FULL_AUTOSTARTDIR
-    CMAKE_INSTALL_FULL_BINDIR
-    CMAKE_INSTALL_FULL_CMAKEPACKAGEDIR
-    CMAKE_INSTALL_FULL_CONFDIR
-    CMAKE_INSTALL_FULL_DATADIR
-    CMAKE_INSTALL_FULL_DATADIR_KF5
-    CMAKE_INSTALL_FULL_DATAROOTDIR
-    CMAKE_INSTALL_FULL_DBUSDIR
-    CMAKE_INSTALL_FULL_DBUSINTERFACEDIR
-    CMAKE_INSTALL_FULL_DBUSSERVICEDIR
-    CMAKE_INSTALL_FULL_DBUSSYSTEMSERVICEDIR
-    CMAKE_INSTALL_FULL_DESKTOPDIR
-    CMAKE_INSTALL_FULL_DOCBUNDLEDIR
-    CMAKE_INSTALL_FULL_EXECROOTDIR
-    CMAKE_INSTALL_FULL_ICONDIR
-    CMAKE_INSTALL_FULL_INCLUDEDIR
-    CMAKE_INSTALL_FULL_INCLUDEDIR_KF5
-    CMAKE_INSTALL_FULL_INFODIR
-    CMAKE_INSTALL_FULL_KCFGDIR
-    CMAKE_INSTALL_FULL_KCONFUPDATEDIR
-    CMAKE_INSTALL_FULL_KNOTIFY5RCDIR
-    CMAKE_INSTALL_FULL_KXMLGUI5DIR
-    CMAKE_INSTALL_FULL_KSERVICES5DIR
-    CMAKE_INSTALL_FULL_KSERVICETYPES5DIR
-    CMAKE_INSTALL_FULL_LIBDIR
-    CMAKE_INSTALL_FULL_LIBEXECDIR
-    CMAKE_INSTALL_FULL_LIBEXECDIR_KF5
-    CMAKE_INSTALL_FULL_LOCALEDIR
-    CMAKE_INSTALL_FULL_LOCALSTATEDIR
-    CMAKE_INSTALL_FULL_MANDIR
-    CMAKE_INSTALL_FULL_MIMEDIR
-    CMAKE_INSTALL_FULL_METAINFODIR
-    CMAKE_INSTALL_FULL_PLUGINDIR
-    CMAKE_INSTALL_FULL_QMLDIR
-    CMAKE_INSTALL_FULL_QTPLUGINDIR
-    CMAKE_INSTALL_FULL_QTQUICKIMPORTSDIR
-    CMAKE_INSTALL_FULL_SBINDIR
-    CMAKE_INSTALL_FULL_SHAREDSTATEDIR
-    CMAKE_INSTALL_FULL_SOUNDDIR
-    CMAKE_INSTALL_FULL_SYSCONFDIR
-    CMAKE_INSTALL_FULL_TEMPLATEDIR
-    CMAKE_INSTALL_FULL_WALLPAPERDIR
-)
-if(APPLE)
-    # The default bundle directory is an absolute path
-    list(APPEND absolute_path_vars
-        BUNDLE_INSTALL_DIR
-        CMAKE_INSTALL_BUNDLEDIR
-        CMAKE_INSTALL_FULL_BUNDLEDIR
-    )
-endif()
-
-foreach(variable ${misc_vars} ${relative_path_vars} ${absolute_path_vars})
-    if(NOT DEFINED ${variable})
-        message(SEND_ERROR "${variable} is not defined.")
-    endif()
-endforeach()
-
-foreach(variable ${relative_path_vars})
-    if(IS_ABSOLUTE ${${variable}})
-        message(SEND_ERROR "${variable} (${${variable}}) should be a relative path, but is absolute.")
-    endif()
-endforeach()
-
-foreach(variable ${absolute_path_vars})
-    if(NOT IS_ABSOLUTE ${${variable}})
-        message(SEND_ERROR "${variable} (${${variable}}) should be an absolute path, but is relative.")
-    endif()
-endforeach()
-
-add_executable(dummy main.c)
-set_target_properties(dummy PROPERTIES RUNTIME_OUTPUT_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
diff --git a/tests/KDEInstallDirsTest/usr_vars_defined/main.c b/tests/KDEInstallDirsTest/usr_vars_defined/main.c
deleted file mode 100644
index c13815ce..00000000
--- a/tests/KDEInstallDirsTest/usr_vars_defined/main.c
+++ /dev/null
@@ -1,4 +0,0 @@
-int main()
-{
-   return 0;
-}
diff --git a/tests/KDEInstallDirsTest/var_list.cmake b/tests/KDEInstallDirsTest/var_list.cmake
new file mode 100644
index 00000000..39bd90fa
--- /dev/null
+++ b/tests/KDEInstallDirsTest/var_list.cmake
@@ -0,0 +1,126 @@
+set(var_suffixes
+    APPDIR
+    AUTOSTARTDIR
+    BINDIR
+    CMAKEPACKAGEDIR
+    CONFDIR
+    DATADIR
+    DATADIR_KF5
+    DATAROOTDIR
+    DBUSDIR
+    DBUSINTERFACEDIR
+    DBUSSERVICEDIR
+    DBUSSYSTEMSERVICEDIR
+    DESKTOPDIR
+    DOCBUNDLEDIR
+    EXECROOTDIR
+    ICONDIR
+    INCLUDEDIR
+    INCLUDEDIR_KF5
+    INFODIR
+    KCFGDIR
+    KCONFUPDATEDIR
+    KNOTIFY5RCDIR
+    KXMLGUI5DIR
+    KSERVICES5DIR
+    KSERVICETYPES5DIR
+    LIBDIR
+    LIBEXECDIR
+    LIBEXECDIR_KF5
+    LOCALEDIR
+    LOCALSTATEDIR
+    MANDIR
+    MIMEDIR
+    METAINFODIR
+    PLUGINDIR
+    QMLDIR
+    QTPLUGINDIR
+    QTQUICKIMPORTSDIR
+    SBINDIR
+    SHAREDSTATEDIR
+    SOUNDDIR
+    SYSCONFDIR
+    TEMPLATEDIR
+    WALLPAPERDIR)
+if(APPLE)
+    list(APPEND var_suffixes BUNDLEDIR)
+endif()
+
+set(compat_APPDIR XDG_APPS_INSTALL_DIR)
+set(compat_AUTOSTARTDIR AUTOSTART_INSTALL_DIR)
+set(compat_BINDIR BIN_INSTALL_DIR)
+set(compat_CMAKEPACKAGEDIR CMAKECONFIG_INSTALL_PREFIX)
+set(compat_CONFDIR CONFIG_INSTALL_DIR)
+set(compat_DATADIR DATA_INSTALL_DIR)
+set(compat_DATADIR_KF5 KF5_DATA_INSTALL_DIR)
+set(compat_DATAROOTDIR SHARE_INSTALL_PREFIX)
+set(compat_DBUSINTERFACEDIR DBUS_INTERFACES_INSTALL_DIR)
+set(compat_DBUSSERVICEDIR DBUS_SERVICES_INSTALL_DIR)
+set(compat_DBUSSYSTEMSERVICEDIR DBUS_SYSTEM_SERVICES_INSTALL_DIR)
+set(compat_DESKTOPDIR XDG_DIRECTORY_INSTALL_DIR)
+set(compat_DOCBUNDLEDIR HTML_INSTALL_DIR)
+set(compat_EXECROOTDIR EXEC_INSTALL_PREFIX)
+set(compat_ICONDIR ICON_INSTALL_DIR)
+set(compat_INCLUDEDIR INCLUDE_INSTALL_DIR)
+set(compat_INCLUDEDIR_KF5 KF5_INCLUDE_INSTALL_DIR)
+set(compat_KCFGDIR KCFG_INSTALL_DIR)
+set(compat_KCONFUPDATEDIR KCONF_UPDATE_INSTALL_DIR)
+set(compat_KNOTIFY5RCDIR KNOTIFYRC_INSTALL_DIR)
+set(compat_KXMLGUI5DIR KXMLGUI_INSTALL_DIR)
+set(compat_KSERVICES5DIR SERVICES_INSTALL_DIR)
+set(compat_KSERVICETYPES5DIR SERVICETYPES_INSTALL_DIR)
+set(compat_LIBDIR LIB_INSTALL_DIR)
+set(compat_LIBEXECDIR LIBEXEC_INSTALL_DIR)
+set(compat_LIBEXECDIR_KF5 KF5_LIBEXEC_INSTALL_DIR)
+set(compat_LOCALEDIR LOCALE_INSTALL_DIR)
+set(compat_MANDIR MAN_INSTALL_DIR)
+set(compat_MIMEDIR XDG_MIME_INSTALL_DIR)
+set(compat_PLUGINDIR PLUGIN_INSTALL_DIR)
+set(compat_QMLDIR QML_INSTALL_DIR)
+set(compat_QTPLUGINDIR QT_PLUGIN_INSTALL_DIR)
+set(compat_QTQUICKIMPORTSDIR IMPORTS_INSTALL_DIR)
+set(compat_SBINDIR SBIN_INSTALL_DIR)
+set(compat_SOUNDDIR SOUND_INSTALL_DIR)
+set(compat_SYSCONFDIR SYSCONF_INSTALL_DIR)
+set(compat_TEMPLATEDIR TEMPLATES_INSTALL_DIR)
+set(compat_WALLPAPERDIR WALLPAPER_INSTALL_DIR)
+if(APPLE)
+    set(compat_BUNDLEDIR BUNDLE_INSTALL_DIR)
+endif()
+
+set(_gnu_install_dirs_suffixes
+    BINDIR
+    SBINDIR
+    LIBEXECDIR
+    SYSCONFDIR
+    SHAREDSTATEDIR
+    LOCALSTATEDIR
+    LIBDIR
+    INCLUDEDIR
+    OLDINCLUDEDIR
+    DATAROOTDIR
+    DATADIR
+    INFODIR
+    LOCALEDIR
+    MANDIR
+    DOCDIR)
+
+if(KDE_INSTALL_DIRS_NO_CMAKE_VARIABLES)
+    foreach(suffix ${var_suffixes})
+        set(should_set_CMAKE_INSTALL_${suffix} FALSE)
+    endforeach()
+elseif(KDE_INSTALL_DIRS_NO_DEPRECATED)
+    foreach(suffix ${var_suffixes})
+        set(should_set_CMAKE_INSTALL_${suffix} FALSE)
+    endforeach()
+    foreach(suffix ${_gnu_install_dirs_suffixes})
+        set(should_set_CMAKE_INSTALL_${suffix} TRUE)
+    endforeach()
+else()
+    foreach(suffix ${var_suffixes})
+        set(should_set_CMAKE_INSTALL_${suffix} TRUE)
+    endforeach()
+endif()
+
+unset(_gnu_install_dirs_suffixes)
+
diff --git a/tests/KDEInstallDirsTest/vars_defined/CMakeLists.txt b/tests/KDEInstallDirsTest/vars_defined/CMakeLists.txt
deleted file mode 100644
index ab46cee1..00000000
--- a/tests/KDEInstallDirsTest/vars_defined/CMakeLists.txt
+++ /dev/null
@@ -1,175 +0,0 @@
-project(KDEInstallDirs.vars_defined)
-cmake_minimum_required(VERSION 2.8.12)
-
-set(ECM_KDE_MODULE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/../../../kde-modules)
-set(ECM_MODULE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/../../../modules)
-set(CMAKE_MODULE_PATH "${ECM_KDE_MODULE_DIR}")
-include(KDEInstallDirs)
-
-set(misc_vars
-    CMAKE_INSTALL_DEFAULT_COMPONENT_NAME
-    INSTALL_TARGETS_DEFAULT_ARGS
-    KF5_INSTALL_TARGETS_DEFAULT_ARGS
-)
-
-set(relative_path_vars
-    # old-style variables
-    AUTOSTART_INSTALL_DIR
-    BIN_INSTALL_DIR
-    CMAKECONFIG_INSTALL_PREFIX
-    CONFIG_INSTALL_DIR
-    DATA_INSTALL_DIR
-    DBUS_INTERFACES_INSTALL_DIR
-    DBUS_SERVICES_INSTALL_DIR
-    DBUS_SYSTEM_SERVICES_INSTALL_DIR
-    EXEC_INSTALL_PREFIX
-    HTML_INSTALL_DIR
-    ICON_INSTALL_DIR
-    IMPORTS_INSTALL_DIR
-    INCLUDE_INSTALL_DIR
-    KCFG_INSTALL_DIR
-    KCONF_UPDATE_INSTALL_DIR
-    KF5_DATA_INSTALL_DIR
-    KF5_INCLUDE_INSTALL_DIR
-    KF5_LIBEXEC_INSTALL_DIR
-    KNOTIFYRC_INSTALL_DIR
-    KXMLGUI_INSTALL_DIR
-    LIBEXEC_INSTALL_DIR
-    LIB_INSTALL_DIR
-    LOCALE_INSTALL_DIR
-    MAN_INSTALL_DIR
-    PLUGIN_INSTALL_DIR
-    QML_INSTALL_DIR
-    QT_PLUGIN_INSTALL_DIR
-    SBIN_INSTALL_DIR
-    SERVICES_INSTALL_DIR
-    SERVICETYPES_INSTALL_DIR
-    SHARE_INSTALL_PREFIX
-    SOUND_INSTALL_DIR
-    SYSCONF_INSTALL_DIR
-    TEMPLATES_INSTALL_DIR
-    WALLPAPER_INSTALL_DIR
-    XDG_APPS_INSTALL_DIR
-    XDG_DIRECTORY_INSTALL_DIR
-    XDG_MIME_INSTALL_DIR
-
-    # new-style variables
-    CMAKE_INSTALL_APPDIR
-    CMAKE_INSTALL_AUTOSTARTDIR
-    CMAKE_INSTALL_BINDIR
-    CMAKE_INSTALL_CMAKEPACKAGEDIR
-    CMAKE_INSTALL_CONFDIR
-    CMAKE_INSTALL_DATADIR
-    CMAKE_INSTALL_DATADIR_KF5
-    CMAKE_INSTALL_DATAROOTDIR
-    CMAKE_INSTALL_DBUSDIR
-    CMAKE_INSTALL_DBUSINTERFACEDIR
-    CMAKE_INSTALL_DBUSSERVICEDIR
-    CMAKE_INSTALL_DBUSSYSTEMSERVICEDIR
-    CMAKE_INSTALL_DESKTOPDIR
-    CMAKE_INSTALL_DOCBUNDLEDIR
-    CMAKE_INSTALL_EXECROOTDIR
-    CMAKE_INSTALL_ICONDIR
-    CMAKE_INSTALL_INCLUDEDIR
-    CMAKE_INSTALL_INCLUDEDIR_KF5
-    CMAKE_INSTALL_INFODIR
-    CMAKE_INSTALL_KCFGDIR
-    CMAKE_INSTALL_KCONFUPDATEDIR
-    CMAKE_INSTALL_KNOTIFY5RCDIR
-    CMAKE_INSTALL_KXMLGUI5DIR
-    CMAKE_INSTALL_KSERVICES5DIR
-    CMAKE_INSTALL_KSERVICETYPES5DIR
-    CMAKE_INSTALL_LIBDIR
-    CMAKE_INSTALL_LIBEXECDIR
-    CMAKE_INSTALL_LIBEXECDIR_KF5
-    CMAKE_INSTALL_LOCALEDIR
-    CMAKE_INSTALL_LOCALSTATEDIR
-    CMAKE_INSTALL_MANDIR
-    CMAKE_INSTALL_MIMEDIR
-    CMAKE_INSTALL_METAINFODIR
-    CMAKE_INSTALL_PLUGINDIR
-    CMAKE_INSTALL_QMLDIR
-    CMAKE_INSTALL_QTPLUGINDIR
-    CMAKE_INSTALL_QTQUICKIMPORTSDIR
-    CMAKE_INSTALL_SBINDIR
-    CMAKE_INSTALL_SHAREDSTATEDIR
-    CMAKE_INSTALL_SOUNDDIR
-    CMAKE_INSTALL_SYSCONFDIR
-    CMAKE_INSTALL_TEMPLATEDIR
-    CMAKE_INSTALL_WALLPAPERDIR
-)
-
-set(absolute_path_vars
-    CMAKE_INSTALL_FULL_APPDIR
-    CMAKE_INSTALL_FULL_AUTOSTARTDIR
-    CMAKE_INSTALL_FULL_BINDIR
-    CMAKE_INSTALL_FULL_CMAKEPACKAGEDIR
-    CMAKE_INSTALL_FULL_CONFDIR
-    CMAKE_INSTALL_FULL_DATADIR
-    CMAKE_INSTALL_FULL_DATADIR_KF5
-    CMAKE_INSTALL_FULL_DATAROOTDIR
-    CMAKE_INSTALL_FULL_DBUSDIR
-    CMAKE_INSTALL_FULL_DBUSINTERFACEDIR
-    CMAKE_INSTALL_FULL_DBUSSERVICEDIR
-    CMAKE_INSTALL_FULL_DBUSSYSTEMSERVICEDIR
-    CMAKE_INSTALL_FULL_DESKTOPDIR
-    CMAKE_INSTALL_FULL_DOCBUNDLEDIR
-    CMAKE_INSTALL_FULL_EXECROOTDIR
-    CMAKE_INSTALL_FULL_ICONDIR
-    CMAKE_INSTALL_FULL_INCLUDEDIR
-    CMAKE_INSTALL_FULL_INCLUDEDIR_KF5
-    CMAKE_INSTALL_FULL_INFODIR
-    CMAKE_INSTALL_FULL_KCFGDIR
-    CMAKE_INSTALL_FULL_KCONFUPDATEDIR
-    CMAKE_INSTALL_FULL_KNOTIFY5RCDIR
-    CMAKE_INSTALL_FULL_KXMLGUI5DIR
-    CMAKE_INSTALL_FULL_KSERVICES5DIR
-    CMAKE_INSTALL_FULL_KSERVICETYPES5DIR
-    CMAKE_INSTALL_FULL_LIBDIR
-    CMAKE_INSTALL_FULL_LIBEXECDIR
-    CMAKE_INSTALL_FULL_LIBEXECDIR_KF5
-    CMAKE_INSTALL_FULL_LOCALEDIR
-    CMAKE_INSTALL_FULL_LOCALSTATEDIR
-    CMAKE_INSTALL_FULL_MANDIR
-    CMAKE_INSTALL_FULL_MIMEDIR
-    CMAKE_INSTALL_FULL_METAINFODIR
-    CMAKE_INSTALL_FULL_PLUGINDIR
-    CMAKE_INSTALL_FULL_QMLDIR
-    CMAKE_INSTALL_FULL_QTPLUGINDIR
-    CMAKE_INSTALL_FULL_QTQUICKIMPORTSDIR
-    CMAKE_INSTALL_FULL_SBINDIR
-    CMAKE_INSTALL_FULL_SHAREDSTATEDIR
-    CMAKE_INSTALL_FULL_SOUNDDIR
-    CMAKE_INSTALL_FULL_SYSCONFDIR
-    CMAKE_INSTALL_FULL_TEMPLATEDIR
-    CMAKE_INSTALL_FULL_WALLPAPERDIR
-)
-if(APPLE)
-    # The default bundle directory is an absolute path
-    list(APPEND absolute_path_vars
-        BUNDLE_INSTALL_DIR
-        CMAKE_INSTALL_BUNDLEDIR
-        CMAKE_INSTALL_FULL_BUNDLEDIR
-    )
-endif()
-
-foreach(variable ${misc_vars} ${relative_path_vars} ${absolute_path_vars})
-    if(NOT DEFINED ${variable})
-        message(SEND_ERROR "${variable} is not defined.")
-    endif()
-endforeach()
-
-foreach(variable ${relative_path_vars})
-    if(IS_ABSOLUTE ${${variable}})
-        message(SEND_ERROR "${variable} (${${variable}}) should be a relative path, but is absolute.")
-    endif()
-endforeach()
-
-foreach(variable ${absolute_path_vars})
-    if(NOT IS_ABSOLUTE ${${variable}})
-        message(SEND_ERROR "${variable} (${${variable}}) should be an absolute path, but is relative.")
-    endif()
-endforeach()
-
-add_executable(dummy main.c)
-set_target_properties(dummy PROPERTIES RUNTIME_OUTPUT_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
diff --git a/tests/KDEInstallDirsTest/vars_defined/main.c b/tests/KDEInstallDirsTest/vars_defined/main.c
deleted file mode 100644
index c13815ce..00000000
--- a/tests/KDEInstallDirsTest/vars_defined/main.c
+++ /dev/null
@@ -1,4 +0,0 @@
-int main()
-{
-   return 0;
-}
diff --git a/tests/KDEInstallDirsTest/vars_in_sync/CMakeLists.txt b/tests/KDEInstallDirsTest/vars_in_sync/CMakeLists.txt
index 4249ed0d..73e6db55 100644
--- a/tests/KDEInstallDirsTest/vars_in_sync/CMakeLists.txt
+++ b/tests/KDEInstallDirsTest/vars_in_sync/CMakeLists.txt
@@ -6,168 +6,32 @@ set(ECM_MODULE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/../../../modules)
 set(CMAKE_MODULE_PATH "${ECM_KDE_MODULE_DIR}")
 include(KDEInstallDirs)
 
-set(var_suffixes
-    APPDIR
-    AUTOSTARTDIR
-    BINDIR
-    CMAKEPACKAGEDIR
-    CONFDIR
-    DATADIR
-    DATADIR_KF5
-    DATAROOTDIR
-    DBUSDIR
-    DBUSINTERFACEDIR
-    DBUSSERVICEDIR
-    DBUSSYSTEMSERVICEDIR
-    DESKTOPDIR
-    DOCBUNDLEDIR
-    EXECROOTDIR
-    ICONDIR
-    INCLUDEDIR
-    INCLUDEDIR_KF5
-    INFODIR
-    KCFGDIR
-    KCONFUPDATEDIR
-    KNOTIFY5RCDIR
-    KXMLGUI5DIR
-    KSERVICES5DIR
-    KSERVICETYPES5DIR
-    LIBDIR
-    LIBEXECDIR
-    LIBEXECDIR_KF5
-    LOCALEDIR
-    LOCALSTATEDIR
-    MANDIR
-    MIMEDIR
-    METAINFODIR
-    PLUGINDIR
-    QMLDIR
-    QTPLUGINDIR
-    QTQUICKIMPORTSDIR
-    SBINDIR
-    SHAREDSTATEDIR
-    SOUNDDIR
-    SYSCONFDIR
-    TEMPLATEDIR
-    WALLPAPERDIR)
-
-set(COMPAT_APPDIR XDG_APPS_INSTALL_DIR)
-set(COMPAT_AUTOSTARTDIR AUTOSTART_INSTALL_DIR)
-set(COMPAT_BINDIR BIN_INSTALL_DIR)
-set(COMPAT_CMAKEPACKAGEDIR CMAKECONFIG_INSTALL_PREFIX)
-set(COMPAT_CONFDIR CONFIG_INSTALL_DIR)
-set(COMPAT_DATADIR DATA_INSTALL_DIR)
-set(COMPAT_DATADIR_KF5 KF5_DATA_INSTALL_DIR)
-set(COMPAT_DATAROOTDIR SHARE_INSTALL_PREFIX)
-set(COMPAT_DBUSINTERFACEDIR DBUS_INTERFACES_INSTALL_DIR)
-set(COMPAT_DBUSSERVICEDIR DBUS_SERVICES_INSTALL_DIR)
-set(COMPAT_DBUSSYSTEMSERVICEDIR DBUS_SYSTEM_SERVICES_INSTALL_DIR)
-set(COMPAT_DESKTOPDIR XDG_DIRECTORY_INSTALL_DIR)
-set(COMPAT_DOCBUNDLEDIR HTML_INSTALL_DIR)
-set(COMPAT_EXECROOTDIR EXEC_INSTALL_PREFIX)
-set(COMPAT_ICONDIR ICON_INSTALL_DIR)
-set(COMPAT_INCLUDEDIR INCLUDE_INSTALL_DIR)
-set(COMPAT_INCLUDEDIR_KF5 KF5_INCLUDE_INSTALL_DIR)
-set(COMPAT_KCFGDIR KCFG_INSTALL_DIR)
-set(COMPAT_KCONFUPDATEDIR KCONF_UPDATE_INSTALL_DIR)
-set(COMPAT_KNOTIFY5RCDIR KNOTIFYRC_INSTALL_DIR)
-set(COMPAT_KXMLGUI5DIR KXMLGUI_INSTALL_DIR)
-set(COMPAT_KSERVICES5DIR SERVICES_INSTALL_DIR)
-set(COMPAT_KSERVICETYPES5DIR SERVICETYPES_INSTALL_DIR)
-set(COMPAT_LIBDIR LIB_INSTALL_DIR)
-set(COMPAT_LIBEXECDIR LIBEXEC_INSTALL_DIR)
-set(COMPAT_LIBEXECDIR_KF5 KF5_LIBEXEC_INSTALL_DIR)
-set(COMPAT_LOCALEDIR LOCALE_INSTALL_DIR)
-set(COMPAT_MANDIR MAN_INSTALL_DIR)
-set(COMPAT_MIMEDIR XDG_MIME_INSTALL_DIR)
-set(COMPAT_PLUGINDIR PLUGIN_INSTALL_DIR)
-set(COMPAT_QMLDIR QML_INSTALL_DIR)
-set(COMPAT_QTPLUGINDIR QT_PLUGIN_INSTALL_DIR)
-set(COMPAT_QTQUICKIMPORTSDIR IMPORTS_INSTALL_DIR)
-set(COMPAT_SBINDIR SBIN_INSTALL_DIR)
-set(COMPAT_SOUNDDIR SOUND_INSTALL_DIR)
-set(COMPAT_SYSCONFDIR SYSCONF_INSTALL_DIR)
-set(COMPAT_TEMPLATEDIR TEMPLATES_INSTALL_DIR)
-set(COMPAT_WALLPAPERDIR WALLPAPER_INSTALL_DIR)
-if(APPLE)
-    set(COMPAT_BUNDLEDIR BUNDLE_INSTALL_DIR)
-    list(APPEND var_suffixes BUNDLEDIR)
-endif()
-
-set(gnu_install_dirs_suffixes
-    BINDIR
-    SBINDIR
-    LIBEXECDIR
-    SYSCONFDIR
-    SHAREDSTATEDIR
-    LOCALSTATEDIR
-    LIBDIR
-    INCLUDEDIR
-    OLDINCLUDEDIR
-    DATAROOTDIR
-    DATADIR
-    INFODIR
-    LOCALEDIR
-    MANDIR
-    DOCDIR)
-
-macro(assert_defined varname)
-    if(NOT DEFINED ${varname})
-        message(SEND_ERROR "${varname} is not defined.")
-    endif()
-endmacro()
-macro(assert_non_empty varname)
-    assert_defined(${varname})
-    if(NOT ${varname})
-        message(SEND_ERROR "${varname} is empty")
-    endif()
-endmacro()
-macro(assert_str_equal varname exp_varname)
-    assert_defined(${varname})
-    if(NOT ${varname} STREQUAL ${exp_varname})
-        message(SEND_ERROR "${varname} is '${${varname}}', expecting '${${exp_varname}}'.")
-    endif()
-endmacro()
-set(FOO bax)
-assert_defined(FOO)
-set(BAR bax)
-assert_str_equal(FOO BAR)
+include(../var_list.cmake)
+include(../../test_helpers.cmake)
 
 foreach(suffix ${var_suffixes})
-    assert_defined(KDE_INSTALL_${suffix})
-    assert_defined(KDE_INSTALL_FULL_${suffix})
-
-    set(should_have_cmake_var TRUE)
-    if(KDE_INSTALL_DIRS_NO_CMAKE_VARIABLES)
-        set(should_have_cmake_var FALSE)
-    elseif(KDE_INSTALL_DIRS_NO_DEPRECATED)
-        list(FIND gnu_install_dirs_suffixes "${suffix}" _list_offset)
-        if(_list_offset EQUAL -1)
-            set(should_have_cmake_var FALSE)
-        endif()
-    endif()
-    if(should_have_cmake_var)
-        assert_str_equal(CMAKE_INSTALL_${suffix} KDE_INSTALL_${suffix})
-        assert_str_equal(CMAKE_INSTALL_FULL_${suffix} KDE_INSTALL_FULL_${suffix})
+    assert_var_defined(KDE_INSTALL_${suffix})
+    if(DEFINED ${suffix}_expected_value)
+        assert_vars_strequal(KDE_INSTALL_${suffix} ${suffix}_expected_value)
     endif()
+    assert_var_defined(KDE_INSTALL_FULL_${suffix})
 
-    set(should_have_compat_var TRUE)
-    if(NOT DEFINED COMPAT_${suffix})
-        set(should_have_compat_var FALSE)
-    elseif(KDE_INSTALL_DIRS_NO_DEPRECATED)
-        set(should_have_compat_var FALSE)
+    if(should_set_CMAKE_INSTALL_${suffix})
+        assert_vars_strequal(CMAKE_INSTALL_${suffix} KDE_INSTALL_${suffix})
+        assert_vars_strequal(CMAKE_INSTALL_FULL_${suffix} KDE_INSTALL_FULL_${suffix})
     endif()
-    if(should_have_compat_var)
-        assert_str_equal(${COMPAT_${suffix}} KDE_INSTALL_${suffix})
+
+    if(NOT KDE_INSTALL_DIRS_NO_DEPRECATED AND DEFINED compat_${suffix})
+        assert_vars_strequal(${compat_${suffix}} KDE_INSTALL_${suffix})
     endif()
 endforeach()
 
-assert_defined(KF5_INSTALL_TARGETS_DEFAULT_ARGS)
-assert_defined(KDE_INSTALL_TARGETS_DEFAULT_ARGS)
+assert_var_defined(KF5_INSTALL_TARGETS_DEFAULT_ARGS)
+assert_var_defined(KDE_INSTALL_TARGETS_DEFAULT_ARGS)
 if(NOT KDE_INSTALL_DIRS_NO_CMAKE_VARIABLES AND
    NOT KDE_INSTALL_DIRS_NO_DEPRECATED)
-    assert_str_equal(INSTALL_TARGETS_DEFAULT_ARGS
-                     KDE_INSTALL_TARGETS_DEFAULT_ARGS)
+    assert_vars_strequal(INSTALL_TARGETS_DEFAULT_ARGS
+                         KDE_INSTALL_TARGETS_DEFAULT_ARGS)
 endif()
 
 add_executable(dummy main.c)
diff --git a/tests/test_helpers.cmake b/tests/test_helpers.cmake
new file mode 100644
index 00000000..db4fc802
--- /dev/null
+++ b/tests/test_helpers.cmake
@@ -0,0 +1,37 @@
+macro(assert_var_defined varname)
+    if(NOT DEFINED ${varname})
+        message(SEND_ERROR "${varname} is not defined.")
+    endif()
+endmacro()
+
+macro(assert_vars_strequal varname exp_varname)
+    assert_var_defined(${varname})
+    if(NOT ${varname} STREQUAL ${exp_varname})
+        message(SEND_ERROR "${varname} is '${${varname}}', expecting '${${exp_varname}}'.")
+    endif()
+endmacro()
+
+macro(assert_var_str_value varname value)
+    assert_var_defined(${varname})
+    set(_value_var "${value}")
+    if(NOT ${varname} STREQUAL _value_var)
+        message(SEND_ERROR "${varname} is '${${varname}}', expecting '${value}'.")
+    endif()
+endmacro()
+
+macro(assert_var_relative_path varname)
+    if(NOT DEFINED ${varname})
+        message(SEND_ERROR "${varname} is not defined.")
+    elseif(IS_ABSOLUTE "${${varname}}")
+        message(SEND_ERROR "${varname} (${${varname}}) should be a relative path, but is absolute.")
+    endif()
+endmacro()
+
+macro(assert_var_absolute_path varname)
+    if(NOT DEFINED ${varname})
+        message(SEND_ERROR "${varname} is not defined.")
+    elseif(NOT IS_ABSOLUTE "${${varname}}")
+        message(SEND_ERROR "${varname} (${${varname}}) should be an absolute path, but is relative.")
+    endif()
+endmacro()
+