How to test rails ETag caching?

Question

Is it possible to cover my controller, that is highly depeinding on Etags with unit tests?

Here's what i'm trying to do: in case if page is not stale (meaning that it's fresh), i'm adding some header to response.

When i'm trying to test it all (rspec), no matter how many similar requests i have, i still receive 200 OK instead of 304, and my header doesn't get modified. Furthermore, if i track request.fresh?(response), it's ALWAYS false.

However, it perfectly works in browser. I've already tried to state ActionController::Base.perform_caching = true, it doesn't change the overall situation.

Thank you

Answer 1

Here's how you can test if second request returns 304 response:

    get action, params
    assert_response 200, @response.body
    etag = @response.headers["ETag"]
    @request.env["HTTP_IF_NONE_MATCH"] = etag
    get action, params
    assert_response 304, @response.body