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Hello. Ktor/Kotlin newbie here. I'm writing a client for an API and my client is wrapping Ktor in such a way that I can replace its engine with a `MockEngine` for testing. However, I'm finding myself duplicating the config (e.g., `install(...)` ) across the two clients because I couldn't find a way to define it once. Any pointers on how one may do that?

I also tried something like this but it doesn't seem to have made any difference:

```val mockClient = HttpClient(MockEngine) {
        engine {
            addHandler(...)
        }
        install(originalClient)
    }```

Which engine are you using? If it’s OkHttp, you could take advantage of MockWebServer:
<https://github.com/square/okhttp/tree/master/mockwebserver>

Thanks Chris! I'm using OkHTTP but I already have a test suite written with `MockEngine`  so I wouldn't like to rewrite it to use MockWebServer from OkHTTP.

Anyway, I've manage to achieve what I wanted by making the engine in `HttpClient(...)` variable (OkHTTP in prod, MockEngine in the unit tests).