How can we unit test a function for capturing Image in android?

I am creating a function which uses intent to capture the image.It is working fine. How can I write unit test for that using Roboeletric framework?

    void captureImage() {
    Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
    fileUri = getOutputMediaFileUri(MEDIA_TYPE_IMAGE);
    intent.putExtra(MediaStore.EXTRA_OUTPUT, fileUri);
    startActivityForResult(intent, CAMERA_CAPTURE_IMAGE_REQUEST_CODE);
    }

I created a test which is attached below. But, neither it is using Roboeletric nor it seems a good unit testing example.

    public void testCaptureImage() {
    Intent intent = new Intent();
    intent.setType("image/*");
    intent.putExtra(Intent.EXTRA_ALLOW_MULTIPLE, true);
    intent.setAction(Intent.ACTION_GET_CONTENT);
    assertEquals(true, intent.getExtras().get(Intent.EXTRA_ALLOW_MULTIPLE));
    }