A modern programming language that makes developers happier.

kotlinlang

Hi, I’ve run an issue with testing a Ktor app where the test client receives a response with status `415` when `201` is expected. Running the app and calling the same endpoint via curl works as expected, leading me to believe that I’ve done something wrong with the test client setup. Any pointers would be appreciated. Details in thread.

Test set up is as follows:
```testApplication {
  // ... test application setup ...
  
  val testClient = createClient {
      install(ContentNegotiation) {
          json(Json { DefaultJson })
      }

      install(Auth) {
          bearer {
              loadTokens {
                  BearerTokens(jwt, "nope")
              }
          }
      }
  }

  <http://testClient.post|testClient.post>("/some-post-endpoint") {
      accept(ContentType.Application.Json)
      contentType(ContentType.Application.Json)
      setBody(CreationRequest("test", listOf("test"), "testOrg", "testId"))
  }.apply {
      assertEquals(HttpStatusCode.Created, status)
  }
}```
`ContentNegotiation` plugin config match the server.

Removing the `createClient` bit and doing the post manually
```  <http://client.post|client.post>("/some-post-endpoint") {
    accept(ContentType.Application.Json)
    contentType(ContentType.Application.Json)
    header(HttpHeaders.Authorization, "Bearer $jwt")
    setBody(
        """
        {
          ... some raw json ...
        }
    """.trimIndent()
    )
  }.apply {
    assertEquals(HttpStatusCode.Created, status)
  }```
Still returns `415 Unsupported Media Type` . What am I missing here?

Aha, found it! Completely my fault. I had missed one of the extension methods with plugins when building `testApplication` :face_palm: