How to test an IntentService with Robolectric?
Solution 1
onHandleIntent
is a protected method so it can't be called directly.
my solution was to extend the service class in my test case, override onHandleIntent
making it public and calling super.onHandleIntent(intent)
then call onHandleIntent
directly from the test case.
Solution 2
Robolectric has a ServiceController
that can go thru service lifecycle just like activity. This controller provides all methods to execute corresponding service callbacks (e.g. controller.attach().create().startCommand(0, 0).destroy()
).
Theoretically we can expect that IntentService.onStartCommand()
will trigger IntentService.onHandleIntent(Intent)
, via its internal Handler
. However this Handler
uses a Looper
which runs on a background thread, and I have no idea how to make this thread advance to next task. A workaround would be to create TestService
that mimics the same behavior, but triggers onHandleIntent(Intent)
on main thread (thread used to run tests).
@RunWith(RobolectricGradleTestRunner.class)
public class MyIntentServiceTest {
private TestService service;
private ServiceController<TestService> controller;
@Before
public void setUp() {
controller = Robolectric.buildService(TestService.class);
service = controller.attach().create().get();
}
@Test
public void testWithIntent() {
Intent intent = new Intent(RuntimeEnvironment.application, TestService.class);
// add extras to intent
controller.withIntent(intent).startCommand(0, 0);
// assert here
}
@After
public void tearDown() {
controller.destroy();
}
public static class TestService extends MyIntentService {
public boolean enabled = true;
@Override
public void onStart(Intent intent, int startId) {
// same logic as in internal ServiceHandler.handleMessage()
// but runs on same thread as Service
onHandleIntent(intent);
stopSelf(startId);
}
}
}
UPDATE: Alternatively, it's quite straightforward to create a similar controller for IntentService, as follows:
public class IntentServiceController<T extends IntentService> extends ServiceController<T> {
public static <T extends IntentService> IntentServiceController<T> buildIntentService(Class<T> serviceClass) {
try {
return new IntentServiceController<>(Robolectric.getShadowsAdapter(), serviceClass);
} catch (IllegalAccessException | InstantiationException e) {
throw new RuntimeException(e);
}
}
private IntentServiceController(ShadowsAdapter shadowsAdapter, Class<T> serviceClass) throws IllegalAccessException, InstantiationException {
super(shadowsAdapter, serviceClass);
}
@Override
public IntentServiceController<T> withIntent(Intent intent) {
super.withIntent(intent);
return this;
}
@Override
public IntentServiceController<T> attach() {
super.attach();
return this;
}
@Override
public IntentServiceController<T> bind() {
super.bind();
return this;
}
@Override
public IntentServiceController<T> create() {
super.create();
return this;
}
@Override
public IntentServiceController<T> destroy() {
super.destroy();
return this;
}
@Override
public IntentServiceController<T> rebind() {
super.rebind();
return this;
}
@Override
public IntentServiceController<T> startCommand(int flags, int startId) {
super.startCommand(flags, startId);
return this;
}
@Override
public IntentServiceController<T> unbind() {
super.unbind();
return this;
}
public IntentServiceController<T> handleIntent() {
invokeWhilePaused("onHandleIntent", getIntent());
return this;
}
}
Solution 3
Robolectric 3.1+
Create an instance of your service
Call onHandleIntent directly
YourService svc = Robolectric.buildService(YourService.class).get();
Intent fakeIntent = new Intent();
fakeIntent.putExtra(YourService.SOME_EXTRA, "debug|fail");
svc.onHandleIntent(fakeIntent);
assertThat(something.happened).isEqualTo(true);
Note: use Robolectric.buildService
(not .buildIntentService
) even if you're testing an IntentService. .buildIntentService
is currently not working, as far as I can tell.
Update 2017-05-17:
Issue with buildIntentService
will be fixed in future
Solution 4
I think you have approached this the wrong way. You are testing here:
Intent startedIntent = shadowActivity.getNextStartedService();
assertNotNull(startedIntent);
that startService()
was called.
You then must assume that Android has implemented their end correctly and that after calling startService()
the service will indeed be started.
I think that if you want to test the behavior of onHandleIntent()
, you must just call it directly??
I am not sure exactly... but I think the test you want to write would just be testing the Android framework. You should write two tests.
1) Test that startService()
is called (as you have in your example).
2) Test the behaviour of onHandleIntent()
(by calling it directly).
I have very little experience with Robolectric
but hopefully this is helpful.
Cheers
Solution 5
I use this
@Before
public void setup(){
mainActivity = Robolectric.buildActivity(MainActivity.class)
.create()
.start()
.resume()
.get();
context = Robolectric.getShadowApplication().getApplicationContext();
bt_start = (Button) mainActivity.findViewById(R.id.button);
bt_stop = (Button) mainActivity.findViewById(R.id.button2);
}
@Test
public void serviceIsOn(){
bt_start.performClick();
Intent intent = Robolectric.shadowOf(mainActivity).peekNextStartedService();
assertEquals(MiService.class.getCanonicalName(),intent.getComponent().getClassName());
}
and then I run the test and all is ok
Gal Ben-Haim
Advanced Technology Director @ http://www.augury.com/
Updated on June 06, 2022Comments
-
Gal Ben-Haim about 2 years
I'm trying to test the
onHandleIntent()
method of anIntentService
usingRobolectric
.I'm starting the service with:
Activity activity = new Activity(); Intent intent = new Intent(activity, MyService.class); activity.startService(intent); ShadowActivity shadowActivity = Robolectric.shadowOf(activity); Intent startedIntent = shadowActivity.getNextStartedService(); assertNotNull(startedIntent);
seems like
startedIntent
is not null, butonHandleIntent()
doesn't seem to be called.how should I test it ?
-
rds about 9 yearsYou are not testing the
onHandleIntent
of the service, as the OP asked. You are testing that the activity calls the service. -
Juan Mendez almost 9 yearsHi. I followed your guideline. I didn't have to write the service in my test case, but just included a public method which calls onHandleIntent which also passes my intent.. Rather that having my activity start the service.. I simply instantiate the service class and make the call. I also included a receiver with the intent, and it was successfully received!
-
Jeff Bowman about 6 yearsNote that the
attach()
calls are implicit as of Robolectric 3.4, and the methods have been markedprivate
. Instead, services are automatically attached when the controller is created.