static use of Android classes fails with ParameterizedRobolectricTestRunner

[m-sasha]

Description

I want to write a parameterized test whose data includes Android classes (android.location.Location), specifically. It appears, though, that ParameterizedRobolectricTestRunner installs the classloader too late, because if I create the test data objects in public static Collection<Object[]> data(), I get an exception saying the relevant method was not mocked (meaning the class loaded wasn't Robolectric's).

The same thing (creating a Location in a static block) succeeds with RobolectricTestRunner.

Test source code

@RunWith(ParameterizedRobolectricTestRunner.class)
@Config(constants = BuildConfig.class)
public class ParameterizedTestTest{


	@ParameterizedRobolectricTestRunner.Parameters
	public static Collection<Object[]> data(){
		Location location = new Location("test");
		location.setTime(System.currentTimeMillis());
		return Arrays.asList(new Object[][]{
			{location}
		});
	}


	private final Location location;


	public ParameterizedTestTest(Location l){
		this.location = l;
	}


	@Test
	public void test(){

	}


}

Robolectric & Android Version

3.6.1 & 23

[SpaceBison]

This is still present in 4.2:

@RunWith(ParameterizedRobolectricTestRunner.class)
public class RobolectricParametrized {

    @ParameterizedRobolectricTestRunner.Parameters()
    public static Collection<Object[]> getParameters() {
        return Collections.singletonList(new Object[] { Looper.getMainLooper() });
    }

    @ParameterizedRobolectricTestRunner.Parameter
    public Looper looper;

    @Test
    public void test() {
        Assert.assertTrue(looper.isCurrentThread());
    }
}

.

java.lang.RuntimeException: Method getMainLooper in android.os.Looper not mocked. See http://g.co/androidstudio/not-mocked for details.

        at android.os.Looper.getMainLooper(Looper.java)
        at RobolectricParametrized.getParameters(RobolectricParametrized.java:16)

[brettchabot]

Can you post a sample code showing how the same code works with RobolectricTestRunner?

IIUC, this issue is unfortunately expected in Robolectric. The sandboxed classloader is set up before each test method, so accessing any Android classes statically before a test runs is not going to work.

[ggabdol]

Is there any plan to support this feature?

[song-water]

Hi, is there any actual progress on this issue?

This is still present in 4.6.1.

https://github.com/robolectric/robolectric/blob/master/robolectric/src/test/java/org/robolectric/ParameterizedRobolectricTestRunnerClassLoaderTest.java
is work well in my PC, but fail with Kotlin :

@RunWith(ParameterizedRobolectricTestRunner::class)
  class ParameterizedRobolectricTestRunnerDemoTest(
      private var uri: Uri
  ) {
      @Test
      @Config(manifest = Config.NONE)
      fun parse() {
          val currentUri = Uri.parse("http://host/")
          assertThat(currentUri).isEqualTo(uri)
      }
  
      companion object {
          @ParameterizedRobolectricTestRunner.Parameters
          @JvmStatic
          fun getTestData(): Collection<*> {
              val data = arrayOf(arrayOf<Any>(Uri.parse("http://host/")))
              return listOf(data)
          }
      }
  }

error log:

parse("http://host/") must not be null
java.lang.NullPointerException: parse("http://host/") must not be null

Test environment

Robolectric: 4.6.1
Kotlin: 1.5.31
AGP: 7.0.0
JDK: 11
PC: windows 10

[utzcoz]

@song-water You need to change the type of data in your getTestData method. See #8122 for potential solution.

[utzcoz]

@SpaceBison I tested your occasion with latest Robolectric, and I can get proper main looper value with Parameter. Please try the latest Robolectric to test it again. @m-sasha I think your occasion is similar to @SpaceBison one. Feel free to reopen this issue if this still exists at your part with latest Robolectric.

[jmartinesp]

@SpaceBison I tested your occasion with latest Robolectric, and I can get proper main looper value with Parameter. Please try the latest Robolectric to test it again. @m-sasha I think your occasion is similar to @SpaceBison one. Feel free to reopen this issue if this still exists at your part with latest Robolectric.

I was trying to get parameterized tests working with robolectric in our project and I saw it fail when using Uris, which seemed quite weird to me, so I also tried adding the test you added above to our project and saw it fail too.

In my case, I can reproduce this with the latest Robolectric version (4.11.1) and using that same test (here is a reproducible project).

I also tried playing with testOptions.unitTests.isReturnDefaultValues and testOptions.unitTests.isIncludeAndroidResources but none seemed to fix the issue. Am I missing something needed for this to actually work?