More test docs about the image.* mixin
@@ -175,7 +175,11 @@ class ImageStructureTestMixin(ArtTestMixin):
class ExtendedImageStructureTestMixin(ImageStructureTestMixin):
- """Checks for additional attributes in the image structure."""
+ """Checks for additional attributes in the image structure.
+
+ Like the base `ImageStructureTestMixin`, per-format test classes
+ should include this mixin to add image-related tests.
+ """
def assertExtendedImageAttributes(self, image, desc=None, type=None): # noqa
self.assertEqual(image.desc, desc)
@@ -308,6 +312,9 @@ class ReadWriteTestBase(ArtTestMixin, GenreListTestMixin,
pasting one of the existing subclasses below. You will want to
update the `format` field in that subclass, and you will probably
need to fiddle with the `bitrate` and other format-specific fields.
+
+ You can also add image tests (using an additional `image.*` fixture
+ file) by including one of the image-related mixins.
"""
full_initial_tags = {
