query: add tests for endpoints + prefix tests

[GiedriusS]

Coming from #2514 (comment).

We should add some similar tests to what Prometheus has here: https://github.com/prometheus/prometheus/blob/84b4d079c8714be8e8ad071a35b0391df270364c/web/web_test.go#L92. AFAICT it should be pretty easy to do:

• Refactor the route registering and starting of the HTTP server into a separate function
• Call it from a test & check all of the endpoints
• Add a test on what happens if a prefix has been specified

Should prevent #2581. Making a separate issue for this because this should encompass all of the endpoints that we expose to our users.

[bwplotka]

👍

Help wanted

[tpaschalis]

I'll take a stab if there's no objection!

[stale]

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[kakkoyun]

@GiedriusS Does #2714 satisfy all the needs here?

[squat]

hm not quite, I think we should still test for combinations for external web prefix + web prefix. We identified last week that these are not yet completely correctly handled

[GiedriusS]

External/route prefix tests are being added in #2800.

[stale]

Hello 👋 Looks like there was no activity on this issue for last 30 days.
Do you mind updating us on the status? Is this still reproducible or needed? If yes, just comment on this PR or push a commit. Thanks! 🤗
If there will be no activity for next week, this issue will be closed (we can always reopen an issue if we need!). Alternatively, use remind command if you wish to be reminded at some point in future.

[GiedriusS]

They have been added, closing.