Add support for ports in withTestApplication

[dave08]

Currently there is no parameter for which port to use in sending a test request, I propose to add this function:

fun TestApplicationEngine.handleRequest(
    method: HttpMethod,
    port: Int = 80,
    uri: String,
    setup: TestApplicationRequest.() -> Unit = {}
): TestApplicationCall = handleRequest {
    this.uri = uri
    this.method = method
    this.addHeader(HttpHeaders.Host, "localhost:$port")
    setup()
}

[brushmate]

This functionality can be simulated by setting the Host header:

handleRequest(Get, "/") {
    addHeader(HttpHeaders.Host, "localhost:1234")
}.apply {
    assertEquals(1234, request.port())
}

[oleg-larshin]

Please check the following ticket on YouTrack for follow-ups to this issue. GitHub issues will be closed in the coming weeks.