How to unit test Home Screen Widgets using Shadow App Widget Manager?

[Damian Mazurkiewicz]

Hello,

I have a custom WidgetProvider class which creates widgets and I am currently trying to unit test behaviour of different methods (such as onUpdate) and layout changes.

I was able to write a test for default layout inflation but I cannot find a way to test onUpdate?

@Test
public void widget2x1DefaultLayoutTest() throws Exception {
    int id = shadowAppWidgetManager.createWidget(Widget2x1.class, R.layout.view_widget2x1);

    View view = shadowAppWidgetManager.getViewFor(id);
    Drawable drawable = context.getResources().getDrawable(R.drawable.icon);

    ImageView logo = (ImageView) view.findViewById(R.id.widget_logo);
    ImageView icon = (ImageView) view.findViewById(R.id.icon);

    TextView max = (TextView) view.findViewById(R.id.max);
    TextView min = (TextView) view.findViewById(R.id.min);

    assertThat(logo.getVisibility(), is(View.VISIBLE));

    assertThat(icon.getDrawable(), is(drawable));
    assertThat(icon.getVisibility(), is(View.VISIBLE));

    assertThat(maxTemperature.getText().toString(), is("--"));
    assertThat(maxTemperature.getVisibility(), is(View.VISIBLE));

    assertThat(minTemperature.getText().toString(), is("--"));
    assertThat(minTemperature.getVisibility(), is(View.VISIBLE));
}

Any help would be appreciated.

Thanks,

Damian

[Erich Douglass]

It's been awhile since I've tested a widget, but it looks like you do something like:

AppWidgetManager manager = AppWidgetManager.getInstance(Robolectric.application)
manager.updateAppWidget(id, views)

Which should call the update method on your widget.

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