Android. Robolectric. Testing AccountManager results - junit

Question

In my application I use method with account manager for getting owner emails. How I can test this method with Robolectric? Should I use for this purpose mocking? If I'm right, can I use Mockito? Is any tutorials how I can do it?

Answer 1

First I implemented the unit test
// Imports are skipped
/**
* Created by fminatchy on 25/02/14.
*/
#RunWith(RobolectricTestRunner.class)
#Config(manifest = "/src/main/AndroidManifest.xml")
public class TestAuthorization {
AccountManager accountManager;
Account account0;
Account account1;
Account account2;
#Before
public void init() {
creationComptes();
accountManager = AccountManager.get(Robolectric.application);
shadowOf(accountManager).addAccount(account0);
shadowOf(accountManager).addAccount(account1);
shadowOf(accountManager).addAccount(account2);
}
#Test
public void test_comptes() {
final AlbumsActivity activity = Robolectric.buildActivity(AlbumsActivity.class).create().get();
final String[] accountsName = activity.getGoogleAccounts();
assertThat(Arrays.asList(accountsName)).containsExactly("compte n°1", "compte n°3");
}
private void creationComptes() {
account0 = new Account("compte n°1", GoogleAccountManager.ACCOUNT_TYPE);
account1 = new Account("compte n°2", "pas google");
account2 = new Account("compte n°3", GoogleAccountManager.ACCOUNT_TYPE);
}
and their is the code located in the activity :
public String[] getGoogleAccounts() {
final AccountManager accountManager = AccountManager.get(this.getApplicationContext());
Account[] accounts = accountManager.getAccountsByType(GoogleAccountManager.ACCOUNT_TYPE);
String[] names = new String[accounts.length];
for (int i = 0; i < names.length; i++) {
names[i] = accounts[i].name;
}
return names;
}