Getting access to UI thread using robolectric

Question

I'm having trouble getting the main UI thread inside a robolectric(version 1.1) testcase. The application method I'm testing has the following check in it:

if (Thread.currentThread() != Looper.getMainLooper().getThread()) {
            throw new IllegalStateException(
                    "This method should be called from the Main UI Thread");
        }
    }

This check fails when invoked in the following way:

    @Test
public void maTest() {

    Runnable task = new Runnable() {

        @Override
        public void run() {

            adapter.testThreadPrecondition();

        }
    };

    new Handler(Looper.getMainLooper()).post(task);
}

Also tried "runOnUiThread", and got same check to fail. What is going on? different main loopers?

Also tried with an AsyncTask, but nothing inside "onPostExecute" seems to get called (or gets called but fails silently) task.execute(); Robolectric.getBackgroundScheduler().runOneTask(); Robolectric.getUiThreadScheduler().runOneTask(); — chris, Jan 06 '14 at 20:18

score 0 · Answer 1 · edited May 23 '17 at 12:14

0

Put the code that checks whether the looper thread is the current thread into a method, say ValidateRunningOnLooperThread().

Then, in the unit test use a mocking framework, such as Mockito to mock that method to just return successfully.

edited May 23 '17 at 12:14

Community

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answered Aug 20 '15 at 19:10

CJBS

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Getting access to UI thread using robolectric

1 Answers1