Add S3 Tests

[href]

This adds an initial set of S3 tests.

⚠️ Only meant to be merged once Ceph Squid is deployed.

[gaudenz]

I'm a bit unsure about the list of fixtures. Do we really need the access_key and secret_key fixtures? Isn't the objects_user fixture good enough for this?

On the other hand an s3_client and sns_client fixture might be handy. I see that constructing the client once in the test to show how to do it is nice, but if we grow this test suite, I might become repetitive.

On the other hand even the object_user fixture is debatable because we probably also want to have tests covering objects user and key creation.

[href]

I'm a bit unsure about the list of fixtures. Do we really need the access_key and secret_key fixtures? Isn't the objects_user fixture good enough for this?

I personally err on the side of too many fixtures: They are cheap, simple, and easy to understand. If it makes the code in front a bit nicer to read, they should be included.

On the other hand an s3_client and sns_client fixture might be handy. I see that constructing the client once in the test to show how to do it is nice, but if we grow this test suite, I might become repetitive.

My thought exactly, but since I don't have additional tests yet, I think this would be premature.

On the other hand even the object_user fixture is debatable because we probably also want to have tests covering objects user and key creation.

For that the create_object_user fixture could be used.

[ubscale]

LGTM

[urscale]

LGTM