Fixed #16406 -- Added ResolveMatch.captured_kwargs and extra_kwargs.

Thanks Florian Apolloner for the review and implementation idea.

tests/i18n/patterns/tests.py

@@ -8,7 +8,7 @@ from django.template import Context, Template
 from django.test import SimpleTestCase, override_settings
 from django.test.client import RequestFactory
 from django.test.utils import override_script_prefix
-from django.urls import clear_url_caches, reverse, translate_url
+from django.urls import clear_url_caches, resolve, reverse, translate_url
 from django.utils import translation
 
 
@@ -198,6 +198,23 @@ class URLTranslationTests(URLTestCaseBase):
             self.assertEqual(translate_url("/nl/gebruikers/", "en"), "/en/users/")
             self.assertEqual(translation.get_language(), "nl")
 
+    def test_reverse_translated_with_captured_kwargs(self):
+        with translation.override("en"):
+            match = resolve("/translated/apo/")
+        # Links to the same page in other languages.
+        tests = [
+            ("nl", "/vertaald/apo/"),
+            ("pt-br", "/traduzidos/apo/"),
+        ]
+        for lang, expected_link in tests:
+            with translation.override(lang):
+                self.assertEqual(
+                    reverse(
+                        match.url_name, args=match.args, kwargs=match.captured_kwargs
+                    ),
+                    expected_link,
+                )
+
 
 class URLNamespaceTests(URLTestCaseBase):
     """

tests/i18n/patterns/urls/default.py

@@ -10,7 +10,10 @@ urlpatterns = [
     path("not-prefixed-include/", include("i18n.patterns.urls.included")),
     re_path(_(r"^translated/$"), view, name="no-prefix-translated"),
     re_path(
-        _(r"^translated/(?P<slug>[\w-]+)/$"), view, name="no-prefix-translated-slug"
+        _(r"^translated/(?P<slug>[\w-]+)/$"),
+        view,
+        {"slug": "default-slug"},
+        name="no-prefix-translated-slug",
     ),
 ]