[libgweather] Restore tests for Locations.xml

[Emmanuele Bassi <ebassi src gnome org>]

commit 3f5f98f4adf61bf31c12f2d8d2641ebe97f82d8d
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Mon Nov 27 17:17:16 2017 +0000

    Restore tests for Locations.xml
    
    Like the old Autotools build, we want to check that the Locations.xml
    file is valid and contains the appropriate timezone data.

 data/meson.build |   18 +++++++++++++++++-
 1 files changed, 17 insertions(+), 1 deletions(-)
---
diff --git a/data/meson.build b/data/meson.build
index dafe889..2a2c159 100644
--- a/data/meson.build
+++ b/data/meson.build
@@ -22,10 +22,26 @@ if enable_glade_catalog
   )
 endif
 
-# FIXME check syntax of Locations.xml
+xmllint = find_program('xmllint', required: false)
+if xmllint.found()
+  test('Valid Locations file',
+       xmllint,
+       args: [
+         '--path', '@0@'.format(meson.current_source_dir()),
+         '--noout',
+         'Locations.xml',
+       ])
+
+  check_timezones = find_program('check-timezones.sh')
+  test('Timezones check',
+       check_timezones,
+       args: ['Locations.xml'])
+endif
+
 install_data('Locations.xml',
   install_dir: pkgdatadir,
 )
+
 install_data('locations.dtd',
   install_dir: pkgdatadir,
 )