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POAsyncTask onPostExecute() not called in Unit Test Case
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  1. POAsyncTask onPostExecute() not called in Unit Test Case
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    copied!<p>I've seen a bunch of posts related to this, but none seem to have the same issue I'm getting. GetBusinessRulesTask extends AsyncTask. When I execute this in a unit test case the onPostExecute() never gets called. However, if I use the real client code then onPostExecute() is called everytime. Not sure what I'm doing wrong here.</p> <p>Test Case:</p> <pre><code>package com.x.android.test.api; import java.util.concurrent.CountDownLatch; import android.test.ActivityInstrumentationTestCase2; import android.test.UiThreadTest; import android.widget.Button; import com.x.android.api.domain.businessrule.BusinessRules; import com.x.android.api.exception.NetworkConnectionException; import com.x.android.api.tasks.GetBusinessRulesTask; import com.x.android.test.activity.SimpleActivity; public class GetBusinessRulesTaskTest extends ActivityInstrumentationTestCase2&lt;SimpleActivity&gt; { SimpleActivity mActivity; Button mButton; public GetBusinessRulesTaskTest() { super("com.x.android.test.activity", SimpleActivity.class); } @Override protected void setUp() throws Exception { super.setUp(); mActivity = this.getActivity(); mButton = (Button) mActivity .findViewById(com.x.android.test.activity.R.id.b1); } public void testPreconditions() { assertNotNull(mButton); } @UiThreadTest public void testCallBack() throws Throwable { final CountDownLatch signal = new CountDownLatch(1); final GetBusinessRulesTask task = (GetBusinessRulesTask) new GetBusinessRulesTask( new GetBusinessRulesTask.Receiver&lt;BusinessRules&gt;() { @Override public void onReceiveResult(BusinessRules rules, Exception e) { assertNotNull(rules); assertNull(e); signal.countDown();// notify the count down latch } }); task.start(mActivity.getApplicationContext()); try { signal.await();// wait for callback } catch (InterruptedException e1) { fail(); e1.printStackTrace(); } } } </code></pre> <p>OnPostExecute:</p> <pre><code>@Override protected void onPostExecute(AsyncTaskResponse&lt;O&gt; response) { Log.d(TAG, "onPostExecuted"); if (mReceiver != null) { mReceiver.onReceiveResult(response.getResponse(), response.getException()); } } </code></pre> <p>DoInBackground:</p> <pre><code>@Override protected AsyncTaskResponse&lt;O&gt; doInBackground(I... params) { Log.d(TAG, "doInBackgroundr"); try { Uri uri = createUri(params); mBaseRequest = new GetLegacyRequest(uri); String json = mBaseRequest.executeRequest(); O response = deserializeJson(json); Log.d(TAG, "Returning AsyncTaskResponse"); return new AsyncTaskResponse&lt;O&gt;(response, null); } catch (Exception e) { Log.e(TAG, "Error", e); /* AsyncTaskResponse&lt;O&gt; maintenance = ReadBusinessControlledPropertiesTask.blockingCall(mServiceLocatorUrl); if(maintenance.getException() == null) { MaintenanceException mExcep = new MaintenanceException( maintenance.getResponse()); if (mExcep.isUnderMaintenance()) return new AsyncTaskResponse(null,mExcep); }*/ return new AsyncTaskResponse&lt;O&gt;(null, e); } } </code></pre> <p>Start method()</p> <pre><code>public AsyncTask&lt;Void, Void, AsyncTaskResponse&lt;BusinessRules&gt;&gt; start( Context context) throws NetworkConnectionException { super.start(context); Log.d(TAG, "start"); return execute(); } </code></pre> <p>FOUND THE ISSUE. Don't make your AsyncTask final and put it inside the runnable. </p> <p>The fix:</p> <pre><code>public void testCallBack() throws Throwable { final CountDownLatch signal = new CountDownLatch(1); // Execute the async task on the UI thread! THIS IS KEY! runTestOnUiThread(new Runnable() { @Override public void run() { try { GetBusinessRulesTask task = (GetBusinessRulesTask)new GetBusinessRulesTask(new GetBusinessRulesTask.Receiver&lt;BusinessRules&gt;() { @Override public void onReceiveResult( BusinessRules rules, Exception e) { assertNotNull(rules); assertNull(e); signal.countDown();// notify the count downlatch } }); task.start(mActivity.getApplicationContext()); } catch (Exception e) { Log.e(TAG, "ERROR", e); fail(); } } }); try { signal.await();// wait for callback } catch (InterruptedException e1) { fail(); e1.printStackTrace(); } } </code></pre>
 

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