# devopsgym / testgen__prometheus__prometheus-10415

- taskset: [devopsgym](https://harnessreport.com/tasks/devopsgym.md)
- difficulty: hard
- category: test-generation
- language: 
- runnable from the site: no
- agent timeout: 3000s

## Results by harness

_none yet_

## Instruction

```
The following text contains a user issue (in <issue/> brackets) posted at a repository. Further, you are provided with file contents of several files in the repository that contain relevant code (in <code> brackets). It may be necessary to use code from third party dependencies or files not contained in the attached documents however. Your task is to identify the issue and implement a test case that verifies a proposed solution to this issue. More details at the end of this text.
<issue>
      ## Proposal
Grafana Agent embeds common Prometheus exporters as "integrations." These integrations work by exposing a unique metrics endpoint per integration and automatically configuring scrape managers to collect metrics from these endpoints. This requires Grafana Agent to have an HTTP server for integrations to work. We would like the ability to disable the HTTP server without breaking the ability to use integrations. If the Grafana Agent could scrape targets without using the network, the capability to use integrations without an HTTP server would be retained. 

I propose a way to inject a custom target scrapers into the scrape manager:

1. Make the [`scrape.scraper`](https://github.com/prometheus/prometheus/blob/f4650c27e7b3cfe55b9fd22aa7410a499f46ba6f/scrape/scrape.go#L728-L733) interface and its methods public.
2. Pass a function scrape manager that specifies how to create a scraper: `func(target *scrape.Target, client *http.Client, timeout time.Duration, bodySizeLimit int64) scraper`
3. Loosen the [restriction on targets](https://github.com/prometheus/prometheus/blob/f4650c27e7b3cfe55b9fd22aa7410a499f46ba6f/scrape/target.go#L406-L413) to use a http/https scheme so custom scrapers can use the protocol scheme for hooking in custom logic. 

This proposal isn't as clean as it could be: the implementation of the scraper that the Grafana Agent would use would ignore the http client for integrations. I'm not sure it's worthwhile to create a more minimal design, and the proposal above seems to be the way to add this functionality into Grafana Agent with minimally disruptive changes to Prometheus.

</issue>
Please generate test cases that check whether an implemented solution resolves the issue of the user (at the top, within <issue/> brackets).
You may apply changes to several files.
Apply as much reasoning as you please and see necessary.
Make sure to implement only test cases and don't try to fix the issue itself.
You are not allowed to read git history.
```
---
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