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FindUsedBlobs: Test that seen blobs are skipped
This also copies the TreeLoader interface from internal/walker to allow stubbing the repository in the call to `FindUsedBlobs`.
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9ea1a78bd4
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@ -2,9 +2,14 @@ package restic
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import "context"
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// TreeLoader loads a tree from a repository.
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type TreeLoader interface {
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LoadTree(context.Context, ID) (*Tree, error)
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}
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// FindUsedBlobs traverses the tree ID and adds all seen blobs (trees and data
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// blobs) to the set blobs. Already seen tree blobs will not be visited again.
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func FindUsedBlobs(ctx context.Context, repo Repository, treeID ID, blobs BlobSet) error {
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func FindUsedBlobs(ctx context.Context, repo TreeLoader, treeID ID, blobs BlobSet) error {
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h := BlobHandle{ID: treeID, Type: TreeBlob}
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if blobs.Has(h) {
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return nil
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@ -12,6 +12,7 @@ import (
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"testing"
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"time"
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"github.com/restic/restic/internal/errors"
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"github.com/restic/restic/internal/repository"
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"github.com/restic/restic/internal/restic"
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)
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@ -118,6 +119,31 @@ func TestFindUsedBlobs(t *testing.T) {
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}
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}
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type ForbiddenRepo struct{}
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func (r ForbiddenRepo) LoadTree(ctx context.Context, id restic.ID) (*restic.Tree, error) {
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return nil, errors.New("should not be called")
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}
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func TestFindUsedBlobsSkipsSeenBlobs(t *testing.T) {
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repo, cleanup := repository.TestRepository(t)
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defer cleanup()
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snapshot := restic.TestCreateSnapshot(t, repo, findTestTime, findTestDepth, 0)
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t.Logf("snapshot %v saved, tree %v", snapshot.ID().Str(), snapshot.Tree.Str())
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usedBlobs := restic.NewBlobSet()
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err := restic.FindUsedBlobs(context.TODO(), repo, *snapshot.Tree, usedBlobs)
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if err != nil {
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t.Fatalf("FindUsedBlobs returned error: %v", err)
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}
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err = restic.FindUsedBlobs(context.TODO(), ForbiddenRepo{}, *snapshot.Tree, usedBlobs)
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if err != nil {
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t.Fatalf("FindUsedBlobs returned error: %v", err)
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}
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}
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func BenchmarkFindUsedBlobs(b *testing.B) {
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repo, cleanup := repository.TestRepository(b)
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defer cleanup()
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