My Android application has a simple method to fire off an intent to display a URL.
protected void launchBrowser(int id)
{
Uri uri = Uri.parse( getString( id ) );
Intent intent = new Intent( ACTION_VIEW, uri);
PackageManager packageManager = getPackageManager();
List<ResolveInfo> activities = packageManager.queryIntentActivities(intent, 0);
if (activities.size() > 0)
{
startActivity(intent);
}
else
{
Toast.makeText(getApplicationContext(),
"ERROR - no application to display a web page",
Toast.LENGTH_SHORT).show();
}
}
I'm using Robolectric for unit testing but I'm having trouble verifying this method. Specifically, getPackageManager()
is always returning null. How I can shadow the PackageManager
? I tried creating a ShadowPackageManager
and calling bindShadowClass
, but none of my code gets executed - getPackageManager()
always returns null
. I also tried to Shadow the Application context and return a concrete StubPackageManager
, but got the same results.
Maybe I've been searching/staring too long - is there a better way to unit test this method?
I'm using Robolectric 2.3 for this. As noted in other answers, getPackageManager()
does not return null, but shadowApplication.setPackageManager
no longer exists.
Since you can't mock PackageManager
, you can't give it a list of Intents
to resolve for. Fortunately, Robolectric's PackageManager
subclass, RobolectricPackageManager
, can let you add these intents without a mock:
RobolectricPackageManager rpm = (RobolectricPackageManager)Robolectric.application.getPackageManager();
rpm.addResolveInfoForIntent(new Intent(Settings.ACTION_APPLICATION_DEVELOPMENT_SETTINGS), new ResolveInfo());
For some reason you need to set the shadow packagemanager manually on your application. Create a custom test runner (by extending RobolectricTestRunner) and override the setApplicationState method:
public class MyTestRunner extends RobolectricTestRunner {
@Override
public void setupApplicationstate(RobolectricConfig robolectricConfig) {
super.setupApplicationState(robolectricConfig);
ShadowApplication shadowApplication = shadowOf(Robolectric.application);
shadowApplication.setPackageName(robolectricConfig.getPackageName());
shadowApplication.setPackageManager(new RobolectricPackageManager(Robolectric.application, robolectricConfig));
}
}
Then specify in your tests that you want to use your own test runner:
@RunWith(MyTestRunner.class)
public class MyTest { ... }
I upgraded to the latest Robolectric (version 2.1.1) and the PackageManager doesn't come up null
anymore.
The code below verifies that a browser intent is fired (and configured with a url). I haven't tested this on 1.x, but I think it works there too:
@Test
public void recipeTitleShouldOpenBrowserOnClick() throws Exception
{
title.performClick();
ShadowActivity shadowActivity = shadowOf( detailFragment.getActivity() );
ShadowActivity.IntentForResult intent = shadowActivity.peekNextStartedActivityForResult();
// or
// ShadowActivity.IntentForResult intent = shadowActivity.getNextStartedActivityForResult();
assertThat( intent.intent,
equalTo( createBrowserIntentWithURL( "url" ) ) );
}
Note: I'm invoking start activity from a fragment here.
Just add on to aleph_null's answer, you can use ShadowResolveInfo.newResolveInfo()
to quickly create a mock ResolveInfo
ready to be used (I'm using Robolectric 2.4).
RobolectricPackageManager rpm = (RobolectricPackageManager)Robolectric.application.getPackageManager();
rpm.addResolveInfoForIntent(new Intent(Settings.ACTION_APPLICATION_DEVELOPMENT_SETTINGS), ShadowResolveInfo.newResolveInfo(...));
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