added cache-policy test (#4355)

tests/rest_api/test_0005_chache_policy.py

@@ -0,0 +1,37 @@
+# Copyright (C) 2022 Intel Corporation
+#
+# SPDX-License-Identifier: MIT
+
+from http import HTTPStatus
+import re
+from .utils.config import server_get
+
+class TestCachePolicy:
+
+    @staticmethod
+    def _get_js_bundle_url(response):
+        match = re.search(r'<script type="text/javascript" src="(/assets/cvat-ui.\w+.min.js)"></script>', response)
+        if match:
+            return match.group(1)
+
+    def _test_cache_policy_enabled(self, response):
+        assert response.status_code == HTTPStatus.OK
+        assert 'public' in response.headers['Cache-Control'] and 'max-age' in response.headers['Cache-Control']
+
+    def _test_cache_policy_disabled(self, response):
+        assert response.status_code == HTTPStatus.OK
+        assert 'no-cache' in response.headers['Cache-Control']
+
+    def test_index_not_cached(self, find_users):
+        user = find_users(privilege='user')[0]['username']
+        index_page_response = server_get(user, '/')
+
+        self._test_cache_policy_disabled(index_page_response)
+
+    def test_asset_cached(self, find_users):
+        user = find_users(privilege='user')[0]['username']
+        index_page_response = server_get(user, '/')
+        js_asset_url = self._get_js_bundle_url(index_page_response.content.decode('utf-8'))
+        js_asset_response = server_get(user, js_asset_url)
+
+        self._test_cache_policy_enabled(js_asset_response)