test: add clear-search URL and template tests

Add tests for clear_search_url context and template clear-search button when a search is active.

viewer/test.py

@@ -235,6 +235,26 @@ class GalleryViewTests(GalleryBaseTests):
         self.assertIn("sort=recent", url)
         self.assertIn("theme=light", url)
 
+    def test_clear_search_url_present_and_clears_query(self):
+        # When a search is active the context should provide a URL that
+        # clears the search (no query parameters) for the current path.
+        response = self.client.get("/gallery/?search=match&sort=recent&theme=light")
+        self.assertEqual(response.status_code, 200)
+
+        clear_url = response.context.get("clear_search_url")
+        # For the root path the clear URL should be the gallery root without query
+        self.assertEqual(clear_url, "/gallery/")
+
+    def test_clear_search_url_uses_nested_path(self):
+        # Ensure clear_search_url respects nested paths (clears search but preserves path)
+        response = self.client.get(
+            "/gallery/sub_a/?search=match&sort=recent&theme=light"
+        )
+        self.assertEqual(response.status_code, 200)
+
+        clear_url = response.context.get("clear_search_url")
+        self.assertTrue(clear_url.find("/gallery/sub_a/") == 0)
+
     def test_search_action_url_uses_nested_path(self):
         response = self.client.get("/gallery/sub_a/?sort=recent&theme=light")
         self.assertEqual(response.status_code, 200)
@@ -445,6 +465,17 @@ class GalleryTemplateTests(GalleryBaseTests):
         self.assertIn("Most visited", body)
         self.assertIn("Recently visited", body)
 
+    def test_clear_search_button_shown_when_searching(self):
+        # The template should render a clear-search button when a search is active
+        resp = self.client.get("/gallery/?search=match")
+        body = resp.content.decode("utf-8")
+        self.assertIn('aria-label="Clear search"', body)
+
+        # And it should not be present when there's no search
+        resp2 = self.client.get("/gallery/")
+        body2 = resp2.content.decode("utf-8")
+        self.assertNotIn('aria-label="Clear search"', body2)
+
     def test_template_shows_fallback_icon_for_empty_subdir(self):
         response = self.client.get("/gallery/")
         self.assertEqual(response.status_code, 200)