java - 使用 JUNIT 测试运行 AsyncHttpClient

Question

我已经尝试运行以下 JUnit 测试。当我尝试打印 userHash 字符串时，我发现该字符串为空。这表明 httpclient 根本没有运行。我一直在关注这篇文章...

https://github.com/loopj/android-async-http/issues/173

这是我的类(class)。

public class ECApiManagerTests {
    InstrumentationTestCase runnerHelper = new InstrumentationTestCase();
    private final String userEmail = "removed";
    private final String passWord = "removed";
    String userHash;


    @Test
    public void testPOST()throws Throwable{
        final AsyncHttpClient httpClient = new AsyncHttpClient();


        runnerHelper.runTestOnUiThread(new Runnable() {
            @Override
            public void run() {
                RequestParams params = new RequestParams();
                params.put("email", userEmail);
                params.put("password", passWord);
                httpClient.post("https://edu.chat/api/login/", params, new AsyncHttpResponseHandler() {
                    @Override
                    public void onSuccess(int statusCode, Header[] headers, byte[] responseBody) {
                        //called when response code 200
                        userHash = new String(responseBody);
                    }
                    @Override
                    public void onFailure(int statusCode, Header[] headers, byte[] responseBody, Throwable error) {

                    }
                });


            }
        });

        try {
            System.out.println(userHash);
            JSONObject obj = new JSONObject(userHash);
            Assert.assertEquals("true", obj.getString("success"));

        } catch (JSONException e) {
            e.printStackTrace();
        }





    }

Answer 1

您忘记了解决方案的 CountdownLatch 部分。这很重要，因为请求是异步的，因此您需要等到请求完成才能查看结果。锁存器通过让调用线程等待，直到从响应处理程序调用 onFinish 来完成此操作。

public class ECApiManagerTests {
    InstrumentationTestCase runnerHelper = new InstrumentationTestCase();
    private final String userEmail = "removed";
    private final String passWord = "removed";
    String userHash;

    @Test
    public void testPOST()throws Throwable{
        final AsyncHttpClient httpClient = new AsyncHttpClient();
        final CountDownLatch signal = new CountDownLatch(1);

        runnerHelper.runTestOnUiThread(new Runnable() {
            @Override
            public void run() {
                RequestParams params = new RequestParams();
                params.put("email", userEmail);
                params.put("password", passWord);
                httpClient.post("https://edu.chat/api/login/", params, new AsyncHttpResponseHandler() {
                    @Override
                    public void onSuccess(int statusCode, Header[] headers, byte[] responseBody) {
                        //called when response code 200
                        userHash = new String(responseBody);
                    }
                    @Override
                    public void onFailure(int statusCode, Header[] headers, byte[] responseBody, Throwable error) {

                    }
                    @Override
                    public void onFinish() {
                        signal.countDown();
                    }
                });


            }
        });
        try {
            signal.await(30, TimeUnit.SECONDS); // wait for callback
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        try {
            System.out.println(userHash);
            JSONObject obj = new JSONObject(userHash);
            Assert.assertEquals("true", obj.getString("success"));

        } catch (JSONException e) {
            e.printStackTrace();
        }    
    }