[gnome-maps/wip/mlundblad/meson-appdata-tests] WIP: meson: Add validation tests for desktop and appdata

[Marcus Lundblad <mlundblad src gnome org>]

commit 8500d735d1bea48ee5226df8f228d11c4d4b0818
Author: Marcus Lundblad <ml update uu se>
Date:   Mon Apr 8 22:47:40 2019 +0200

    WIP: meson: Add validation tests for desktop and appdata
    
    Fixes #174

 data/meson.build | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)
---
diff --git a/data/meson.build b/data/meson.build
index 349ff25..2362305 100644
--- a/data/meson.build
+++ b/data/meson.build
@@ -13,7 +13,7 @@ install_data(
 
 desktop = app_id + '.desktop'
 
-custom_target('desktop-file',
+desktop_file = custom_target('desktop-file',
   input: desktop + '.in',
   output: desktop,
   install: true,
@@ -53,4 +53,15 @@ configure_file(
        install_dir: join_paths(datadir, 'dbus-1', 'services')
 )
 
-subdir('icons')
+desktop_file_validate = find_program('desktop-file-validate', required: false)
+if desktop_file_validate.found()
+       test(
+               'validate-desktop',
+               desktop_file_validate,
+               args: [
+                       desktop_file.full_path()
+               ]
+       )
+endif
+
+subdir('icons')
\ No newline at end of file