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How to test menus in Android using Robolectric

I need to write tests in a menu in an Android application using Robolectric.

Menu Source Code:

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.main, menu);
    return super.onCreateOptionsMenu(menu);
}

@Override
public boolean onMenuItemSelected(int featureId, MenuItem item) {
    switch (item.getItemId()) {
    case R.id.exit:
        this.finish();
        break;
    default:
        Toast.makeText(this, getString(R.string.errMsg), Toast.LENGTH_SHORT).show();
        break;
    }
    return super.onMenuItemSelected(featureId, item);
}

Please help write tests

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2 answers

The following example should be a good example for those who start working with Robolectric. It uses Robolectric 3.0 under AndroidStudio.

@RunWith(RobolectricGradleTestRunner.class)
@Config(constants = BuildConfig.class, sdk = 19)
public class MainActivityTest {
    @Test
    public void shouldCloseActivity() {
        MainActivity activity = Robolectric.setupActivity(MainActivity.class);
        MenuItem menuItem = new RoboMenuItem(R.id.exit);
        activity.onOptionsItemSelected(menuItem);
        ShadowActivity shadowActivity = Shadows.shadowOf(activity);
        assertTrue(shadowActivity.isFinishing());
    }
}
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In fact, you should not avoid using RoboMenuItem, if possible. You can get the actual menu created by the activity using robolectric, which creates the action and makes it visible.

MainActivity activity = Robolectric.buildActivity(MainActivity.class).create().visible().get();

You can then use ShadowActivity to get the menu options actually created;

shadowOf(activity).getOptionsMenu()

To get the actual MenuItem:

shadowOf(activity).getOptionsMenu().findMenuItem(...)

onOptionsItemSelected.

RoboMenuItem - , , , robolectric , .

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