prefix imageId with sha256: in containers list

test for compat API ImageId

Signed-off-by: Oliver Thallmair <oliver.thallmair@mailbox.org>

pkg/api/handlers/compat/containers.go

@@ -360,7 +360,7 @@ func LibpodToContainer(l *libpod.Container, sz bool) (*handlers.Container, error
 		ID:         l.ID(),
 		Names:      []string{fmt.Sprintf("/%s", l.Name())},
 		Image:      imageName,
-		ImageID:    imageID,
+		ImageID:    "sha256:" + imageID,
 		Command:    strings.Join(l.Command(), " "),
 		Created:    l.CreatedTime().Unix(),
 		Ports:      ports,

test/apiv2/20-containers.at

@@ -46,6 +46,10 @@ t GET /containers/json?all=true 200 \
   .[0].Image=$IMAGE \
   $network_expect
 
+# compat API imageid with sha256: prefix
+t GET containers/json?limit=1 200 \
+  .[0].ImageID~sha256:[0-9a-f]\\{64\\}
+
 # Make sure `limit` works.
 t GET libpod/containers/json?limit=1 200 \
   length=1 \