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anybody know how to set a custom test dispatcher on a MockEngine?

i used to have a workaround like this <https://youtrack.jetbrains.com/issue/KTOR-6417/MockEngine-the-ability-to-set-dispatcher-is-removed>

that ticket was marked fixed in 3.0.0 so feels like it should be possible

also found this old thread here <https://kotlinlang.slack.com/archives/C0A974TJ9/p1699377388965069>

```        MockEngine { requestData: HttpRequestData -&gt;
            val fakeResponse: FakeKtorResponse = fakeKtorHandlers.firstNotNullOfOrNull { it.invoke(requestData) }
                ?: FakeKtorResponse("", HttpStatusCode.NotFound)
            HttpResponseData(
                body = fakeResponse.content,
                statusCode = fakeResponse.statusCode,
                headers = headersOf(),
                requestTime = GMTDate(),
                version = HttpProtocolVersion.HTTP_1_1,
                callContext = testDispatcher, // SETTING IT HERE
            )
        }```

but it blows up with `Current context doesn't contain Job in it:  StandardTestDispatcher[scheduler=kotlinx.coroutines.test.TestCoroutineScheduler@3d20e575]`

had to switch to `MockEngine.create` and then you can set the `dispatcher` field on the config

```        MockEngine.create {
            dispatcher = testDispatcher
            addHandler { requestData: HttpRequestData -&gt;
                val fakeResponse: FakeKtorResponse = fakeKtorHandlers.firstNotNullOfOrNull { it.invoke(requestData) }
                    ?: FakeKtorResponse("", HttpStatusCode.NotFound)
                respond(
                    content = fakeResponse.content,
                    status = fakeResponse.statusCode,
                )
            }
        }```