Shadowing TimeZone.getDefault using Robolectric

Question

I'm having some troubles shadowing TimeZone.getDefault() using Robolectric since my AppTest.class is not using my static shadow mwthod in ShadowTimeZone.class.

AppTest.class

@RunWith(RobolectricTestRunner.class)
@Config(manifest = "../App/AndroidManifest.xml")
public class AppTest{

    @Test
    @Config(shadows = {ShadowTimeZone.class})
    public void testTimeZone() {    
        String expectedTimeZoneId = "Europe/London";

        TimeZone timeZone = TimeZone.getDefault();

        assertThat(timeZone.getID(), equalTo(expectedTimeZoneId));
    }
}

ShadowTimeZone.class

@Implements(TimeZone.class)
public class ShadowTimeZone {

    @Implementation
    public static TimeZone getDefault() {
        return TimeZone.getTimeZone("Europe/London");
    }
}

score 5 · Answer 1 · edited Sep 13 '16 at 13:56

5

You don't need to use a shadow at all. Use TimeZone.setDefault(TimeZone.getTimeZone("Europe/London")) before your test or in a @Before setup method.

If you still want to use a shadow, the actual signature for getDefault is public static synchronized, so you may need to add synchronized to your shadow method to match.

edited Sep 13 '16 at 13:56

malix

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answered Jan 19 '15 at 20:35

lopar

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score 0 · Answer 2 · edited May 23 '17 at 12:08

0

By default you can only shadow classes from android package. But you can add more classes to work with shadows. See https://stackoverflow.com/a/29641926/3619179

edited May 23 '17 at 12:08

Community

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answered Sep 16 '16 at 23:25

nenick

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Shadowing TimeZone.getDefault using Robolectric

2 Answers2