使用robolectric测试异步任务

Question

你知道如何使用Robolectric实现AsyncTasks的单元测试吗？任何指针将不胜感激.

Answer 1

调用execute(...)任务,然后等待结果调用Robolectric.runBackgroundTasks()/ Robolectric.flushBackgroundThreadScheduler()然后你可以断言.

@Test
public void test() {
    //create task
    MyAsyncTask asyncTask = new MyAsyncTask();

    //start task
    asyncTask.execute(...);

    //wait for task code
    // Robolectric.runBackgroundTasks(); (pre 3.0)
    Robolectric.flushBackgroundThreadScheduler(); //from 3.0

    //can run asserts on result now
    assert...(asyncTask.get());
}

Answer 2

使用Robolectric 2.4,现在是ShadowApplication:

ShadowApplication.runBackgroundTasks();