Fixed #21408 — German Translation for “3 days ago”

The problem:
“3 days ago” should translate to “vor 3 Tagen” in German, while “3 days” translates to “3 Tage”. #21408 describes that django always translated to “Tage”, even when the dative “Tagen” was correct. The same applies to months (“Monate”/“Monaten”) and years (“Jahre”/“Jahren”).

The solution:
Let `timesince` caller provide the string dict to use for the time-related strings.

1 files changed, 26 insertions, 0 deletions

diff --git a/tests/humanize_tests/tests.py b/tests/humanize_tests/tests.py
index df9ae4f35d..2414a55ed7 100644
--- a/tests/humanize_tests/tests.py
+++ b/tests/humanize_tests/tests.py
@@ -289,3 +289,29 @@ class HumanizeTests(SimpleTestCase):
                 self.assertEqual(expected_natural_time, natural_time)
         finally:
             humanize.datetime = orig_humanize_datetime
+
+    def test_dative_inflection_for_timedelta(self):
+        """Translation may differ depending on the string it is inserted in."""
+        test_list = [
+            now - datetime.timedelta(days=1),
+            now - datetime.timedelta(days=2),
+            now - datetime.timedelta(days=30),
+            now - datetime.timedelta(days=60),
+            now - datetime.timedelta(days=500),
+            now - datetime.timedelta(days=865),
+        ]
+        result_list = [
+            'vor 1\xa0Tag',
+            'vor 2\xa0Tagen',
+            'vor 1\xa0Monat',
+            'vor 2\xa0Monaten',
+            'vor 1\xa0Jahr, 4\xa0Monaten',
+            'vor 2\xa0Jahren, 4\xa0Monaten',
+        ]
+
+        orig_humanize_datetime, humanize.datetime = humanize.datetime, MockDateTime
+        try:
+            with translation.override('de'), self.settings(USE_L10N=True):
+                self.humanize_tester(test_list, result_list, 'naturaltime')
+        finally:
+            humanize.datetime = orig_humanize_datetime