[gcloud] Cover url parameters kwarg in tests (#1408)

storages/backends/gcloud.py

@@ -303,8 +303,7 @@ def url(self, name, parameters=None):
         """
         Return public URL or a signed URL for the Blob.
 
-        The existnce of blobs are not verified for public URLs, it makes the code too
-        slow.
+        To keep things snappy, the existence of blobs for public URLs is not checked.
         """
         name = self._normalize_name(clean_name(name))
         blob = self.bucket.blob(name)

tests/test_gcloud.py

@@ -361,7 +361,7 @@ def test_url_not_public_file_with_custom_expires(self):
             expiration=timedelta(seconds=3600), version="v4"
         )
 
-    def test_custom_endpoint(self):
+    def test_custom_endpoint_with_parameters(self):
         self.storage.custom_endpoint = "https://example.com"
 
         self.storage.default_acl = "publicRead"
@@ -377,11 +377,13 @@ def test_custom_endpoint(self):
         type(blob.bucket).name = mock.PropertyMock(return_value=bucket_name)
         blob.generate_signed_url = generate_signed_url
         self.storage._bucket.blob.return_value = blob
-        self.storage.url(self.filename)
+        parameters = {"version": "v2", "method": "POST"}
+        self.storage.url(self.filename, parameters=parameters)
         blob.generate_signed_url.assert_called_with(
             bucket_bound_hostname=self.storage.custom_endpoint,
             expiration=timedelta(seconds=86400),
-            version="v4",
+            method="POST",
+            version="v2",
         )
 
     def test_get_available_name(self):