[damned-lies] Refs #228 - Make xml2po optional in the test suite

[Claude Paroz <claudep src gnome org>]

commit 068e4a1539faf26d97f8388b297d6207b116cff7
Author: Claude Paroz <claude 2xlibre net>
Date:   Sat Apr 17 11:52:16 2021 +0200

    Refs #228 - Make xml2po optional in the test suite

 stats/models.py      | 2 +-
 stats/tests/tests.py | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/stats/models.py b/stats/models.py
index 92d01811..848bc9b9 100644
--- a/stats/models.py
+++ b/stats/models.py
@@ -739,7 +739,7 @@ class Domain(models.Model):
                 # Fallback is intltool, except for meson modules.
                 pot_method = 'gettext' if current_branch.uses_meson else 'intltool'
             else:
-                # Standard gnome-doc-utils pot generation
+                # Standard pot generation
                 potfile, errs = utils.generate_doc_pot_file(current_branch, self)
                 errors.extend(errs)
                 pot_method = None
diff --git a/stats/tests/tests.py b/stats/tests/tests.py
index 1c687718..9b35e72a 100644
--- a/stats/tests/tests.py
+++ b/stats/tests/tests.py
@@ -37,7 +37,6 @@ class ModuleTestCase(TestCase):
     SYS_DEPENDENCIES = (
         ('gettext', 'msgfmt'),
         ('intltool', 'intltool-update'),
-        ('gnome-doc-utils', 'xml2po'),
     )
 
     @classmethod
@@ -555,6 +554,7 @@ class DomainTests(TestModuleBase):
             )
         )
 
+    @skipUnless(utils.check_program_presence('xml2po'), "xml2po is needed for that test.")
     def test_doc_domain_docbook(self):
         """
         Test Docbook-style help