Add a worker for backfilling labels on manifests that have already been backfilled

workers/test/test_manifestbackfillworker.py

@@ -5,6 +5,7 @@ from data.database import (TagManifestLabelMap, TagManifestToManifest, Manifest,
                            TagManifestLabel)
 from image.docker.schema1 import DockerSchema1ManifestBuilder
 from workers.manifestbackfillworker import backfill_manifest
+from workers.labelbackfillworker import backfill_label
 
 from test.fixtures import *
 
@@ -47,6 +48,16 @@ def test_manifestbackfillworker(clear_rows, initialized_db):
                       in ManifestBlob.select().where(ManifestBlob.manifest == manifest_row)}
     assert expected_storages == found_storages
 
+    # Ensure that backfilling labels now works.
+    for tml in TagManifestLabel.select().where(TagManifestLabel.annotated == tag_manifest):
+      assert backfill_label(tml)
+
+      label_map = TagManifestLabelMap.get(tag_manifest_label=tml)
+      assert label_map.tag_manifest == tag_manifest
+      assert label_map.manifest == manifest_row
+      assert label_map.manifest_label.label == label_map.tag_manifest_label.label
+      assert label_map.label == tml.label
+
 
 def test_manifestbackfillworker_broken_manifest(clear_rows, initialized_db):
   # Delete existing tag manifest so we can reuse the tag.