Fix file storage tests for Python 3.12 and newer.
Replace the deprecated and removed unittest.assertEquals() alias
with assertEqual() to maintain compatibility with modern Python
versions while preserving credential storage, token refresh,
and file permission checks.
--- ../tests/test_file.py	2026-10-16 17:22:37.832404979 +0300
+++ ../tests/test_file.py	2026-10-16 17:25:47.810800479 +0300
@@ -122,9 +122,9 @@
         with open(FILENAME) as credentials_file:
             data = json.load(credentials_file)
 
-        self.assertEquals(data['access_token'], 'foo')
-        self.assertEquals(data['_class'], 'OAuth2Credentials')
-        self.assertEquals(data['_module'], client.OAuth2Credentials.__module__)
+        self.assertEqual(data['access_token'], 'foo')
+        self.assertEqual(data['_class'], 'OAuth2Credentials')
+        self.assertEqual(data['_module'], client.OAuth2Credentials.__module__)
 
     def test_token_refresh_store_expired(self):
         expiration = (datetime.datetime.utcnow() -
@@ -144,7 +144,7 @@
         http = http_mock.HttpMock(data=response_content)
 
         credentials._refresh(http)
-        self.assertEquals(credentials.access_token, access_token)
+        self.assertEqual(credentials.access_token, access_token)
 
         # Verify mocks.
         self.assertEqual(http.requests, 1)
@@ -207,7 +207,7 @@
         storage.put(new_cred)
 
         credentials._refresh(None)
-        self.assertEquals(credentials.access_token, 'bar')
+        self.assertEqual(credentials.access_token, 'bar')
 
     def test_token_refresh_stream_body(self):
         expiration = (datetime.datetime.utcnow() +
@@ -263,10 +263,10 @@
         credentials = storage.get()
 
         self.assertIsNotNone(credentials)
-        self.assertEquals('foo', credentials.access_token)
+        self.assertEqual('foo', credentials.access_token)
 
         self.assertTrue(os.path.exists(FILENAME))
 
         if os.name == 'posix':  # pragma: NO COVER
             mode = os.stat(FILENAME).st_mode
-            self.assertEquals('0o600', oct(stat.S_IMODE(mode)))
+            self.assertEqual('0o600', oct(stat.S_IMODE(mode)))