In this thread it's explained how to mock android service:
Is it possible to mock android services under unit tests?
But how can I make my activity use this mock instead of real service?
I'm not using any DI frameworks.
Thanks!
You have to use something, if not DI, just make some Factory class that in test returns a mock instead of real instance.
Related
I haven't done any testing in Android, so please bear with me if this seems a stupid question.
I'm developing an app which makes a lot of network calls from a restful API service. To make the network calls, I'm using Retrofit2 and RxJava.
What would be the best practice/framework to just test if these calls are working? I've started to read the Google Codelab for testing which uses Junit4 and Mockito, but I don't want to do any clicking in the UI to start a test currently, just checking for different API versions which calls are supported or not.
Here some steps for you that I am using:
Use mockito & junit4, for sure :)
I avoid UI tests for these cases
Pass your retrofit Api as a parameter to a class that you want to test
In the test create a mock retrofit api, pass this one as a parameter so you can choose what you want your "Api" to return e.g. objects or errors (see Mockito.when())
Use RxJava's TestSubscriber to test a method e.g. Observable<Location> getLocationFromApi()
Avoid threading in your testing class (e.g. like .observeOn(mainThread())). If inevitable use awaitTerminalEvents in TestSubscriber. If there is no terminal even rethink your test
General tips:
Try to modularize your code so each class has few functionality -> easier to test.
Be patient and don't expect to write tests for e.g. 5% of your code in just one week :) It's a slow process regardless team size
I want to mock the API responses for my Android Async Network Tasks for Unit Testing. Anyone can tell me how to do this? I'm beginner to testing in Android.
Create your own class implementing the same API as your 'real' networking class. When one of its methods, say, method requestData() gets called, wait a bit inside the method then return some mock data in the same way as the real class is supposed to do.
I have been trying to create a juint test for testing a background service which i started in MainActivity class. Is there a way to test the service.
You may use a ServiceTestCase, see http://developer.android.com/tools/testing/service_testing.html
I'm trying to test a service that requires a real Application object, not the MockApplication that the ServiceTestCase provides.
How can I create a real Application object in my ServiceTestCase?
A service has two inherent dependencies, its Context and its associated Application. The ServiceTestCase framework allows you to inject these dependencies, and thus perform unit tests with controlled dependencies in an isolated environment.
You should not use the real Application in your tests, but if you know what you are doing you can inject it using ServiceTestCase.setApplication().
I'm using the android.test.runner library and the AndroidTestCase etc. to create some unit tests. I'm finding it useful, but one test requires access to the application object. Usually I just get that from the activity context, e.g.
AppState appState = ((AppState) myActivity.getApplicationContext());
However, the unit tests are in a class which extends AndroidTextCase, and as far as I can see there is no getApplicationContext available. There is a getContext, but I'm not clear if that's what I want. What's the best course of action?
Are you testing your AppState object, or trying to test something else which relies on it?
If you are not testing AppState in this instance can you use a tool such as Mockito to mock up an AppState object for the purposes of your test.