[bug#28726] [PATCH 3/6] gnu: mail: Fix building python2-django-mailman3.

[Christopher Baines <mail@cbaines.net>]

The python-django-mailman3 build is still broken, as I don't think this
package is compatible with python3 yet. With this patch, the tests fail due to
the lack of urllib2 (which is just urllib in python3).

* gnu/packages/mail.scm (python-django-mailman3)[arguments]: Modify the phases
  to run the tests using django-admin.
---
 gnu/packages/mail.scm | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/gnu/packages/mail.scm b/gnu/packages/mail.scm
index ddf583649..4d0e177e5 100644
--- a/gnu/packages/mail.scm
+++ b/gnu/packages/mail.scm
@@ -2091,6 +2091,17 @@ installation on systems where resources are limited.  Its features include:
         (base32
          "1adxyh8knw9knjlh73xq0jpn5adml0ck4alsv0swakm95wfyx46z"))))
     (build-system python-build-system)
+    (arguments
+     '(#:phases
+       (modify-phases %standard-phases
+         (replace 'check
+           (lambda _
+             (zero?
+              (system*
+               "django-admin"
+               "test"
+               "--settings=django_mailman3.tests.settings_test"
+               "django_mailman3")))))))
     (inputs
      `(("python-django" ,python-django)))
     (propagated-inputs
-- 
2.14.2