Testing ActiveAndroid with Robolectric

Question

What can I do to get some test coverage on ActiveAndroid's ContentProvider in Robolectric? This simple test fails.

The model:

@Table(name = "Things")
    public class Thing extends Model {
    public Thing() {
        super();
    }
}

The test:

@RunWith(RobolectricTestRunner.class)
public class ContentProviderTest {

  @Test
  public void itShouldQuery() throws Exception {
    new Thing().save();
    ContentResolver cr = new MainActivity().getContentResolver();
    assertNotNull(
        cr.query(Uri.parse("content://org.example/things"), 
                   null, null, null, null));
  }
}

The resulting stack trace:

java.lang.NullPointerException: null
    at com.activeandroid.Cache.getTableInfo(Unknown Source)
    at com.activeandroid.Model.<init>(Unknown Source)
    at org.example.Thing.<init>(Thing.java:9)
    at org.example.ProviderTest.itShouldQuery(ProviderTest.java:25)

The application context should be ok. By default, Robolectric creates the application that appears in the manifest, which in this case is com.activeandroid.Application.

So, I'm puzzled why the tableInfo in Cache is not initialized. Normal application execution works fine.

Answer 1

To automatically scan ActiveAndroid Models automatically during maven unit tests requires a simple change to ModelInfo.scanForModel.

In that method, there is a "Robolectric fallback" which detects and scans paths containing "bin". This handles Model classes in Eclipse projects.

Maven compiles to target/classes. An additional check for "classes" in scan paths in ModelInfo does the trick.

Adding an ActiveAndroid pull request for this soon.