Fix URL redirect for apps with no slash (#1088)

* append a slash, if we need, on apps root

* remove white space in blank lines

* add test for new path

tests/unit_tests/test_tethys_apps/test_utilities.py

@@ -167,6 +167,15 @@ def test_get_active_app_url(self, mock_app):
         result = utilities.get_active_app(url="/apps/foo/bar")
         self.assertEqual(mock_app.objects.get(), result)
 
+    @override_settings(MULTIPLE_APP_MODE=True)
+    def test_get_active_app_no_app(self):
+        # check apps with /
+        result = utilities.get_active_app(url="/apps/")
+        self.assertEqual(None, result)
+        # check apps without /
+        result = utilities.get_active_app(url="/apps")
+        self.assertEqual(None, result)
+
     @override_settings(MULTIPLE_APP_MODE=True)
     @mock.patch("tethys_apps.utilities.SingletonHarvester")
     @mock.patch("tethys_apps.models.TethysApp")

tethys_apps/utilities.py

@@ -142,9 +142,13 @@ def get_active_app(request=None, url=None, get_class=False):
         else:
             return None
 
+        apps_root = "apps"
+        if the_url.endswith(f"/{apps_root}"):
+            the_url += "/"
+
         url_parts = the_url.split("/")
         app = None
-        apps_root = "apps"
+
         if apps_root in url_parts:
             # The app root_url is the path item following (+1) the apps_root item
             app_root_url_index = url_parts.index(apps_root) + 1