For instance, the test I had was something like this…

@Test
    fun bbcPipelinesBuildInfoThrowClientException(): Unit = withTestApplication(Application::module) {
        val compliantToken = TokenatorTokenModelEntityBuilder.BUILD_COMPLIANT_TOKEN
        declareMock<BbcPipelineBuildInfoServiceImpl> {
            coEvery {
                getBitbucketPipelineBuildInfo(any(), any(), any(), any(), any(), any())
            } throws ClientRequestException(mockHttpErrorResponse(HttpStatusCode.Unauthorized))
        }
        declareMock<TokenatorServiceImpl> { coEvery { generateToken(any(), any()) } returns compliantToken }
        with(handleRequest(<http://HttpMethod.Post|HttpMethod.Post>, "token/build") {
            SlauthHeadersBuilder.BUILD_PRINCIPAL_HEADERS.forEach { (key, value) -> addHeader(key, value) }
        }) {
            assertThat(HttpStatusCode.InternalServerError).isEqualTo(response.status())
        }
    }

This was working fine with ktor 1.4.0, 1.4.2, 1.4.3. But it doesn’t work with 1.5.0. To be more specific, debugging the test, it doesn’t even reach the following line,

declareMock<TokenatorServiceImpl> { coEvery { generateToken(any(), any()) } returns compliantToken }

Which, is the exactly line after trying to mock the HttpResponse.

My understanding is that the

runBlocking {client.get() }

throws the exception, instead of just “create” the response and mock it silently.