I try to use

testApplication {}

and its

client

but in some cases (?) the request URL is prepended by

<http://localhost>

. So for example

/service/etc

becomes

<http://localhost/service/etc>

when I POST the request, resulting in error 404. Have you seen something similar? Thanks.

Can you share a code for the test to reproduce this issue?

I'm relatively new to ktor, so maybe I misconfigure something...

@Test
    fun testUrlIssue() = testApplication {
        routing {
            post("/{a}/{b}") {
            }
        }

        val httpClient = // or: client
            createClient {
                install(Logging) {
                    logger = Logger.DEFAULT
                    level = LogLevel.ALL
                }
            }

        val response = <http://httpClient.post|httpClient.post>("/a/1")
        assertEquals(HttpStatusCode.OK, response.status) // expected: <200 OK> but was: <404 Not Found>
    }

Log:

09:49:47.583 [Test worker @coroutine#2] INFO io.ktor.client.HttpClient - REQUEST: <http://localhost/a/1>
METHOD: HttpMethod(value=POST)
COMMON HEADERS
-> Accept: */*
-> Accept-Charset: UTF-8
CONTENT HEADERS
-> Content-Length: 0
BODY Content-Type: null
BODY START

BODY END
09:49:47.680 [DefaultDispatcher-worker-1 @call-context#3] INFO ktor.test - No ktor.deployment.watch patterns specified, automatic reload is not active.
09:49:47.732 [DefaultDispatcher-worker-1 @call-context#3] INFO ktor.test - Application started in 0.08 seconds.
09:49:48.255 [DefaultDispatcher-worker-1 @coroutine#8] INFO io.ktor.client.HttpClient - RESPONSE: 404 Not Found
METHOD: HttpMethod(value=POST)
FROM: <http://localhost/a/1>
COMMON HEADERS
-> Content-Length: 0
BODY Content-Type: null
BODY START

BODY END

expected: <200 OK> but was: <404 Not Found>
Expected :200 OK
Actual   :404 Not Found

Thanks.

By default the 404 status code is returned if any other code hasn’t been responded explicitly. To make your test pass, respond with the 200 status code:

routing {
    post("/{a}/{b}") {
        call.respond(HttpStatusCode.OK)
    }
}

omg, what a lame mistake - thanks 🙂