gnu: django: Fix the build for python-django-gravatar2.run-tests-for-python-django-gravatar2

The build was failing as the Django settings were not configured for the
tests. The relevant files are missing from the release on PyPI, so switch to
using a more complete source release. Also update the package at the same
time.

* gnu/packages/django.scm (python-django-gravatar2)[version]: 1.4.0 -> 1.4.2.
  [source]: Change to use a tarball from GitHub, update the sha256 hash.
  [arguments]: Add a phase to skip a test requiring network access, and
  replace the check phase to call ./manage.py within the example_project
  directory.

1 files changed, 29 insertions, 4 deletions

diff --git a/gnu/packages/django.scm b/gnu/packages/django.scm
index a901af6f14..f098ca707c 100644
--- a/gnu/packages/django.scm
+++ b/gnu/packages/django.scm
@@ -271,14 +271,39 @@ account authentication.")
     (source
      (origin
        (method url-fetch)
-       (uri (pypi-uri "django-gravatar2" version))
+       (uri (string-append
+             "https://github.com/twaddington/django-gravatar/archive/"
+             version ".tar.gz"))
        (sha256
         (base32
-         "1qsv40xywbqsf4mkrmsswrpzqd7nfljxpfiim9an2z3dykn5rka6"))))
+         "1qa0awqkfnfcjx7d5ijgr9hj8ifpq5xrj16196im4hw9r9i1wapf"))))
     (build-system python-build-system)
     (arguments
-     '(;; TODO: The django project for the tests is missing from the release.
-       #:tests? #f))
+     '(#:phases
+       (modify-phases %standard-phases
+         ;; TODO: Tagging the tests requiring the web could be done upstream.
+         (add-before 'check 'skip-test-requiring-network-access
+           (lambda _
+             (substitute* "django_gravatar/tests.py"
+               (("def test_has_gravatar")
+                "from django.test import tag
+    @tag('requires-web')
+    def test_has_gravatar"))))
+         (replace 'check
+           (lambda _
+             (setenv "PYTHONPATH"
+                     (string-append
+                      (getcwd)
+                      ":"
+                      (getenv "PYTHONPATH")))
+             (with-directory-excursion "example_project"
+               (zero?
+                (system*
+                 "./manage.py"
+                 "test"
+                 "--verbosity=2"
+                 "--exclude-tag=requires-web"
+                 "django_gravatar"))))))))
     (inputs
      `(("python-django" ,python-django)))
     (home-page "https://github.com/twaddington/django-gravatar")