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Micronaut：无法使用junit测试重定向响应

• 问答

我正在尝试测试Controller返回HttpResponse.seeOther(URI.create(redirecturi));的重定向方案。问题是我的测试用例遵循重定向，而不是返回HttpResponse<String>或类似的东西。如何在micronaut中进行测试？

控制器 

  @Post("/some/endpoint")
  public HttpResponse<?> capture(@Body Map<String,String> body)
      throws Exception {
    // do something
    String uri = getRedirecturi();
    return HttpResponse.seeOther(URI.create(redirecturi));
  }

测试 

  @Test
  public void testCapture() {
    String expectedUri = getRedirecturi();
    //following doesn't work
    String redirectUrl = client.toBlocking().retrieve(HttpRequest.POST("/some/endpoint",body),String.class);
    assertEquals(expectedUri,redirectUrl);

    //following also doesn't work
    HttpResponse<String> response = client.toBlocking().retrieve(HttpRequest.POST("/some/controller",someBody),HttpResponse.class);
    assertEquals(HttpStatus.SEE_OTHER,response.status());
  }

错误 

16:59:32.321 [nioEventLoopGroup-1-3] TRACE i.m.http.client.DefaultHttpClient - HTTP Client Response Received for Request: POST http://localhost:65164/some/endpoint
16:59:32.322 [nioEventLoopGroup-1-3] TRACE i.m.http.client.DefaultHttpClient - Status Code: 303 See Other
16:59:32.322 [nioEventLoopGroup-1-3] TRACE i.m.http.client.DefaultHttpClient - Location: http://localhost:8080/target/location.html
16:59:32.322 [nioEventLoopGroup-1-3] TRACE i.m.http.client.DefaultHttpClient - Date: Wed,13 Nov 2019 23:59:32 GMT
16:59:32.322 [nioEventLoopGroup-1-3] TRACE i.m.http.client.DefaultHttpClient - connection: close
16:59:32.322 [nioEventLoopGroup-1-3] TRACE i.m.http.client.DefaultHttpClient - Response Body
16:59:32.322 [nioEventLoopGroup-1-3] TRACE i.m.http.client.DefaultHttpClient - ----
16:59:32.322 [nioEventLoopGroup-1-3] TRACE i.m.http.client.DefaultHttpClient - 
16:59:32.322 [nioEventLoopGroup-1-3] TRACE i.m.http.client.DefaultHttpClient - ----


io.micronaut.http.client.exceptions.HttpClientException: Connect Error: Connection refused: localhost/127.0.0.1:8080

    at io.micronaut.http.client.DefaultHttpClient.lambda$null$24(DefaultHttpClient.java:1035)
    at io.netty.util.concurrent.DefaultPromise.notifyListener0(DefaultPromise.java:511)
    at io.netty.util.concurrent.DefaultPromise.notifyListeners0(DefaultPromise.java:504)
    at io.netty.util.concurrent.DefaultPromise.notifyListenersnow(DefaultPromise.java:483)
    at io.netty.util.concurrent.DefaultPromise.notifyListeners(DefaultPromise.java:424)
    at io.netty.util.concurrent.DefaultPromise.tryFailure(DefaultPromise.java:121)
    at io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.fulfillConnectPromise(AbstractNioChannel.java:327)
    at io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.finishConnect(AbstractNioChannel.java:343)
    at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:632)
    at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:579)
    at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:496)
    at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:458)
    at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:897)
    at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
    at java.lang.Thread.run(Thread.java:748)
Caused by: io.netty.channel.AbstractChannel$Annotatedconnectexception: Connection refused: localhost/127.0.0.1:8080
    at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
    at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
    at io.netty.channel.socket.nio.NioSocketChannel.doFinishConnect(NioSocketChannel.java:327)
    at io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.finishConnect(AbstractNioChannel.java:340)
    ... 7 more
Caused by: java.net.connectexception: Connection refused
    ... 11 more
ling5090 回答：Micronaut：无法使用junit测试重定向响应

我测试了某些情况，并观察到Micronaut客户端处理了Response的某些类型（Http请参见“其他”，“错误请求”，“服务器错误”）。
在您的情况下，一种解决方法是尝试获取对象，该对象由See Other指向并assert指向的端点给出。

但是，如果真的只想获取String，则在Controller方法中，将返回值更改为HttpResponse.status(HttpStatus.SEE_OTHER).body(URI.create(redirectUri);

,

使用 client.exchange() 方法实施替代方法，该方法可返回发布者。 io.reactivex.subscribers.TestSubscriber可用于订阅和测试断言。

HttpClient.exchange()方法签名-

<I,O> Publisher<HttpResponse<O>> exchange(HttpRequest<I> request,Class<O> bodyType) {...}

使用 TestSubscriber -

的工作用例 
@Test
public void testCapture() {
  //Instead of using client.toBlocking().retrieve(...)
  /*
  String redirectUrl = client.toBlocking()
      .retrieve(HttpRequest.POST("/some/endpoint",body),String.class);
  */

  // Use client.exchange(...)
  Publisher<HttpResponse<Object>> exchange =
    client.exchange(HttpRequest.POST("/payment/1234567890/capture",body)
        .contentType(MediaType.APPLICATION_FORM_URLENCODED),Object.class);

  TestSubscriber<HttpResponse<?>> testSubscriber = new TestSubscriber<HttpResponse<?>>() {
    @Override
    public void onNext(HttpResponse<?> httpResponse) {
      assertNotNull(httpResponse);
      assertEquals(HttpStatus.SEE_OTHER,httpResponse.status());
      assertEquals(getRedirectUri(),httpResponse.header("location"));
    }
  };

  exchange.subscribe(testSubscriber);

  // await to allow for response
  testSubscriber.awaitTerminalEvent(2,TimeUnit.SECONDS);

  // assert for errors,completion,terminated etc.
  testSubscriber.assertNoErrors();
  testSubscriber.assertComplete();
  testSubscriber.assertTerminated();
}
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