测试使用 Mockk 添加了 header

Question

当我在我的自定义拦截器 class 上调用拦截方法时，我正在尝试编写一个测试来检查是否将 header 添加到请求中。当我运行sendsNewContractHeaderToRequest测试时，我收到一个没有找到答案的异常，我不确定如何修改我的测试，以便它通过。 我认为这是因为我没有嘲笑继续调用，但我不确定在这种情况下该怎么做。

没有找到答案：Chain(#1).proceed(Request{method=GET, url=http://somehost/somepath, headers=[foo:bar, Contract:new]}) io.mockk.MockKException: 没有答案找到：Chain(#1).proceed(Request{method=GET, url=http://somehost/somepath, headers=[foo:bar, Contract:new]})

这是我的2节课：

class ContractInterceptor(private val contractType: ContractType) : Interceptor {

override fun intercept(chain: Interceptor.Chain): Response = try {
    chain.proceed(
        chain.request()
            .newBuilder()
            .addHeader("Contract", contractType.headerValue)
            .build()
    )
} catch (ex: IOException) {
    Response.Builder()
        .protocol(Protocol.HTTP_2)
        .request(chain.request())
        .code(HttpURLConnection.HTTP_INTERNAL_ERROR)
        .message(ex.localizedMessage)
        .body("Internal Server Error".toResponseBody("application/json".toMediaType()))
        .build()
}

enum class ContractType(val headerValue: String) {
    NEW("new"), V2("v2"), V3("v3")
}}

这是我的测试 class

class ContractInterceptorTest {

private val mockChain: Interceptor.Chain = mockk {
    every { request() } returns Request.Builder()
        .url("http://somehost/somepath")
        .addHeader("foo", "bar")
        .build()
}

@Test
fun sendsNewContractHeaderToRequest() {
    ContractInterceptor(ContractInterceptor.ContractType.NEW)
        .intercept(mockChain)

    val slot = slot<Request>()
    verify { mockChain.proceed(capture(slot)) }

    assertThat(slot.captured.headers.size == 2)
    assertThat(slot.captured.headers["Contract"] == "new")
    assertThat(slot.captured.headers["foo"] == "bar")
}

@Test
fun returns500WhenIOExceptionThrown() {
    every { mockChain.proceed(any()) } throws IOException("An Exception!")

    val response = ContractInterceptor(ContractInterceptor.ContractType.NEW)
        .intercept(mockChain)

    assertThat(response).isNotNull
    assertThat(response.code).isEqualTo(HttpURLConnection.HTTP_INTERNAL_ERROR)
}

}

Answer 1

有必要模拟 proceed 方法。

private val mockChain: Interceptor.Chain = mockk(relaxed = true) {
        every { request() } returns Request.Builder()
            .url("http://somehost/somepath")
            .addHeader("foo", "bar")
            .build()
        
        every { proceed(any()) } returns Response.Builder()
            .request(request)
            .protocol(Protocol.HTTP_1_1)
            .code(200)
            .message("Test")
            .body("abc".toResponseBody())
            .build()
    }