puppeteer_tests: Reset test environment after each run.

When running some tests multiple times in the same call,
were failing because of the data duplication.

This commit resolves that issue by resetting the test
environment (i.e: Re-cloning test database and clearing
cache) after each run.

Fixes #17607.

tools/test-js-with-puppeteer

@@ -5,10 +5,13 @@ import shlex
 import subprocess
 import sys
 
+import requests
+
 sys.path.append(os.path.join(os.path.dirname(__file__), ".."))
 from scripts.lib.zulip_tools import ENDC, FAIL, OKGREEN
 
 ZULIP_PATH = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+from zerver.lib.test_fixtures import reset_zulip_test_database
 
 # Request the special webpack setup for frontend integration tests,
 # where webpack assets are compiled up front rather than running in
@@ -83,6 +86,13 @@ def run_tests(files: Iterable[str], external_host: str) -> None:
                 flush=True,
             )
             ret = subprocess.call(cmd)
+
+            # Resetting test environment.
+            reset_zulip_test_database()
+            # We are calling to /flush_caches to remove all the server-side caches.
+            response = requests.get("http://zulip.zulipdev.com:9981/flush_caches")
+            assert response.status_code == 200
+
             if ret != 0:
                 return ret, current_test_num
             current_test_num += 1