让Robolectric与Volley合作

问题描述：

我正在尝试让Volley与Robolectric合作.我可以看到我的HTTP请求被调用，并且parseNetworkResponse被调用(我正在发送JsonRequest的自定义子类)，但是我的监听器没有被调用.有什么建议吗?这是一个代码示例:

I am trying to get Volley working with Robolectric. I can see that my HTTP request is getting called, and parseNetworkResponse is getting called (I'm sending a custom subclass of JsonRequest), but my Listener is NOT getting called. Any advice? Here is a code sample:

@Test
public void testTypeAheadClient() throws Exception {
    Robolectric.getFakeHttpLayer().interceptHttpRequests(false);
    //mRemoteRequestQueue and mCustomRequest are set up previously
    mRemoteRequestQueue.add(mCustomRequest);
}

private static class CustomRequest extends JsonRequest<MyObject> {
    public CustomRequest(String url,
                         Response.Listener<MyObject> listener,
                         Response.ErrorListener errorListener) {
        super(Request.Method.GET, url, null, listener, errorListener);
    }

    @Override
    protected Response<MyObject> parseNetworkResponse(NetworkResponse response) {
        System.out.println("in parseNetworkResponse");
        try {
            MyObject myObject = new MyObject(new JSONArray(new String(response.data, "UTF-8")));
            return Response.success(myObject, HttpHeaderParser.parseCacheHeaders(response));
        } catch (Exception e) {
            e.printStackTrace();
            return Response.error(new ParseError(e));
        }
    }
}

答

我通过将RequestQueue的ResponseDelivery替换为不使用Looper.getMainLooper()而是使用新的Executor的方法来解决了相同的问题.示例代码:

I solved that same problem by replacing the RequestQueue's ResponseDelivery with one that doesn't use the Looper.getMainLooper() but a new Executor. Example code:

public static RequestQueue newRequestQueueForTest(final Context context, final OkHttpClient okHttpClient) {
    final File cacheDir = new File(context.getCacheDir(), "volley");

    final Network network = new BasicNetwork(new OkHttpStack(okHttpClient));

    final ResponseDelivery responseDelivery = new ExecutorDelivery(Executors.newSingleThreadExecutor());

    final RequestQueue queue =
            new RequestQueue(
                    new DiskBasedCache(cacheDir),
                    network,
                    4,
                    responseDelivery);

    queue.start();

    return queue;
}

注意:使用Robolectric-2.2-SNAPSHOT，以前的版本在Volley上不能很好地发挥作用.

Note: use Robolectric-2.2-SNAPSHOT, the previous version doesn't play well with Volley.

希望这会有所帮助

让Robolectric与Volley合作

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