I created a class that I call ServiceLocator that allows me to do lightweight dependency injection (as opposed to using a heavy library that requires annotation and/or reflection).
You can declare interfaces for things that you need mocked, register them with their proper implementations in your Application.onCreate, but then in your unit tests re-register those interfaces to the mock objects. I've found that when I need to wait for Application.onCreate to finish in my unit tests, I derive them from ActivityTestCase and call getInstrumentation().waitForIdleSync(); Here's my class - you can copy it, or use the library it's in if you'd like. https://github.com/aguynamedrich/beacon-utils/blob/master/Library/src/us/beacondigital/utils/ServiceLocator.java in Application.onCreate, you'd do ServiceLocator.register(FooInterface.class, FooImplementation.class); And in your unit test setup, you'd do ServiceLocator.register(FooInterface.class, MockFooImpl.class); Then, in your code, you'd resolve your interfaces with ServiceLocator.resolve(FooInterface.class); Documented roughly here: https://github.com/aguynamedrich/beacon-utils#to-use-servicelocator-as-a-dependency-container On Sunday, March 23, 2014 9:37:13 PM UTC-7, Yuvi wrote: > > > Hi, > > I am facing issue while unit testing : > > // Service class that have to be tested. > > class FooService extends Service{ > > public static FooService sFooService; > > private Bar mBar = new Bar(); > //Other private objects > > @Override > protected void onCreate() > { > sFooService = this; > } > > public static FooService getInstance() > { > return sFooService; > } > > @Override > protected void onDestroy() > { > sFooService = null; > } > > public void doSomething() > { > //do Some stuff here > if(done) > { > mBar.perfomAction(true); > // Now this performAction method doing many stuffs using some > other classes > // that may have dependency and initialized from some else. Hence > throwing exceptions. > // Therefore need to mock Bar class. but how ?? > } > else > { > mBar.perfomAction(false); > } > }} > > > // Test Class > > class FooTest extends ServiceTestCase<FooService>{ > > protected void setUp() throws Exception > { > super.setUp(); > MockitoAnnotations.initMocks(this); > startService(new Intent(getContext(), FooService.class)); > > } > > protected void tearDown() throws Exception > { > super.tearDown(); > } > > public void testdoSomething() > { > Bar bar = mock(bar.class); > doThrow(new RuntimeException re).when(bar).performAction(true); > > //How to inject bar mocked object? > > assertNotNull(FooService.getInstance()); > > try > { > FooService.getInstance().doSomeThing(); > Assert.Fail("Runtime exception should be thrown"); > } > catch (RuntimeException re) > { > > } > }} > > > Now, here how can I inject bar mocked object which is created using > Mockito ? > > I have googled this, and found that some guys suggested to create getter > and setter for Bar class. Which I don't think is a valid solution, because > there could be number of private object, that will be visible to outside > FooService class. > > Regards, > > Yuvi > > -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en --- You received this message because you are subscribed to the Google Groups "Android Developers" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
