def test_item_ext_add_to(self) -> None:
item = pystac.Item.from_file(self.sentinel_example_uri)
item.stac_extensions.remove(SarExtension.get_schema_uri())
self.assertNotIn(SarExtension.get_schema_uri(), item.stac_extensions)
_ = SarExtension.ext(item, add_if_missing=True)
self.assertIn(SarExtension.get_schema_uri(), item.stac_extensions)
def test_extension_not_implemented(self) -> None:
# Should raise exception if Item does not include extension URI
item = pystac.Item.from_file(self.sentinel_example_uri)
item.stac_extensions.remove(SarExtension.get_schema_uri())
with self.assertRaises(pystac.ExtensionNotImplemented):
_ = SarExtension.ext(item)
# Should raise exception if owning Item does not include extension URI
asset = item.assets["measurement"]
with self.assertRaises(pystac.ExtensionNotImplemented):
_ = SarExtension.ext(asset)
# Should succeed if Asset has no owner
ownerless_asset = pystac.Asset.from_dict(asset.to_dict())
_ = SarExtension.ext(ownerless_asset)