tests(cmd): add coverage for migrateActionsArtifacts

Also convert a comment into a warning in the logs when the deletion of
an artifact cannot find the file in the destination storage.

The case were an error happens while deleting the file is not covered
as it would require to mock the storage.Copy function.

(cherry picked from commit e759794408)

cmd/migrate_storage.go

@@ -170,8 +170,8 @@ func migrateActionsArtifacts(ctx context.Context, dstStorage storage.ObjectStora
 
 		_, err := storage.Copy(dstStorage, artifact.StoragePath, storage.ActionsArtifacts, artifact.StoragePath)
 		if err != nil {
-			// ignore files that do not exist
 			if errors.Is(err, fs.ErrNotExist) {
+				log.Warn("ignored: actions artifact %s exists in the database but not in storage", artifact.StoragePath)
 				return nil
 			}
 			return err

cmd/migrate_storage_test.go

@@ -5,10 +5,12 @@ package cmd
 
 import (
 	"context"
+	"io"
 	"os"
 	"strings"
 	"testing"
 
+	"code.gitea.io/gitea/models/actions"
 	"code.gitea.io/gitea/models/db"
 	"code.gitea.io/gitea/models/packages"
 	"code.gitea.io/gitea/models/unittest"
@@ -16,11 +18,28 @@ import (
 	packages_module "code.gitea.io/gitea/modules/packages"
 	"code.gitea.io/gitea/modules/setting"
 	"code.gitea.io/gitea/modules/storage"
+	"code.gitea.io/gitea/modules/test"
 	packages_service "code.gitea.io/gitea/services/packages"
 
 	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
 )
 
+func createLocalStorage(t *testing.T) (storage.ObjectStorage, string) {
+	t.Helper()
+
+	p := t.TempDir()
+
+	storage, err := storage.NewLocalStorage(
+		context.Background(),
+		&setting.Storage{
+			Path: p,
+		})
+	require.NoError(t, err)
+
+	return storage, p
+}
+
 func TestMigratePackages(t *testing.T) {
 	assert.NoError(t, unittest.PrepareTestDatabase())
 
@@ -55,14 +74,7 @@ func TestMigratePackages(t *testing.T) {
 
 	ctx := context.Background()
 
-	p := t.TempDir()
-
-	dstStorage, err := storage.NewLocalStorage(
-		ctx,
-		&setting.Storage{
-			Path: p,
-		})
-	assert.NoError(t, err)
+	dstStorage, p := createLocalStorage(t)
 
 	err = migratePackages(ctx, dstStorage)
 	assert.NoError(t, err)
@@ -73,3 +85,50 @@ func TestMigratePackages(t *testing.T) {
 	assert.EqualValues(t, "01", entries[0].Name())
 	assert.EqualValues(t, "tmp", entries[1].Name())
 }
+
+func TestMigrateActionsArtifacts(t *testing.T) {
+	assert.NoError(t, unittest.PrepareTestDatabase())
+
+	srcStorage, _ := createLocalStorage(t)
+	defer test.MockVariableValue(&storage.ActionsArtifacts, srcStorage)()
+	id := int64(0)
+
+	addArtifact := func(storagePath string, status actions.ArtifactStatus) {
+		id++
+		artifact := &actions.ActionArtifact{
+			ID:           id,
+			ArtifactName: storagePath,
+			StoragePath:  storagePath,
+			Status:       int64(status),
+		}
+		_, err := db.GetEngine(db.DefaultContext).Insert(artifact)
+		require.NoError(t, err)
+		srcStorage.Save(storagePath, strings.NewReader(storagePath), -1)
+	}
+
+	exists := "/exists"
+	addArtifact(exists, actions.ArtifactStatusUploadConfirmed)
+
+	expired := "/expired"
+	addArtifact(expired, actions.ArtifactStatusExpired)
+
+	notFound := "/notfound"
+	addArtifact(notFound, actions.ArtifactStatusUploadConfirmed)
+	srcStorage.Delete(notFound)
+
+	dstStorage, _ := createLocalStorage(t)
+
+	assert.NoError(t, migrateActionsArtifacts(db.DefaultContext, dstStorage))
+
+	object, err := dstStorage.Open(exists)
+	assert.NoError(t, err)
+	buf, err := io.ReadAll(object)
+	require.NoError(t, err)
+	assert.Equal(t, exists, string(buf))
+
+	_, err = dstStorage.Stat(expired)
+	assert.Error(t, err)
+
+	_, err = dstStorage.Stat(notFound)
+	assert.Error(t, err)
+}