package xfer import ( "errors" "sync/atomic" "testing" "time" "github.com/docker/distribution" "github.com/docker/docker/layer" "github.com/docker/docker/pkg/progress" "golang.org/x/net/context" ) const maxUploadConcurrency = 3 type mockUploadDescriptor struct { currentUploads *int32 diffID layer.DiffID simulateRetries int } // Key returns the key used to deduplicate downloads. func (u *mockUploadDescriptor) Key() string { return u.diffID.String() } // ID returns the ID for display purposes. func (u *mockUploadDescriptor) ID() string { return u.diffID.String() } // DiffID should return the DiffID for this layer. func (u *mockUploadDescriptor) DiffID() layer.DiffID { return u.diffID } // SetRemoteDescriptor is not used in the mock. func (u *mockUploadDescriptor) SetRemoteDescriptor(remoteDescriptor distribution.Descriptor) { } // Upload is called to perform the upload. func (u *mockUploadDescriptor) Upload(ctx context.Context, progressOutput progress.Output) (distribution.Descriptor, error) { if u.currentUploads != nil { defer atomic.AddInt32(u.currentUploads, -1) if atomic.AddInt32(u.currentUploads, 1) > maxUploadConcurrency { return distribution.Descriptor{}, errors.New("concurrency limit exceeded") } } // Sleep a bit to simulate a time-consuming upload. for i := int64(0); i <= 10; i++ { select { case <-ctx.Done(): return distribution.Descriptor{}, ctx.Err() case <-time.After(10 * time.Millisecond): progressOutput.WriteProgress(progress.Progress{ID: u.ID(), Current: i, Total: 10}) } } if u.simulateRetries != 0 { u.simulateRetries-- return distribution.Descriptor{}, errors.New("simulating retry") } return distribution.Descriptor{}, nil } func uploadDescriptors(currentUploads *int32) []UploadDescriptor { return []UploadDescriptor{ &mockUploadDescriptor{currentUploads, layer.DiffID("sha256:cbbf2f9a99b47fc460d422812b6a5adff7dfee951d8fa2e4a98caa0382cfbdbf"), 0}, &mockUploadDescriptor{currentUploads, layer.DiffID("sha256:1515325234325236634634608943609283523908626098235490238423902343"), 0}, &mockUploadDescriptor{currentUploads, layer.DiffID("sha256:6929356290463485374960346430698374523437683470934634534953453453"), 0}, &mockUploadDescriptor{currentUploads, layer.DiffID("sha256:cbbf2f9a99b47fc460d422812b6a5adff7dfee951d8fa2e4a98caa0382cfbdbf"), 0}, &mockUploadDescriptor{currentUploads, layer.DiffID("sha256:8159352387436803946235346346368745389534789534897538734598734987"), 1}, &mockUploadDescriptor{currentUploads, layer.DiffID("sha256:4637863963478346897346987346987346789346789364879364897364987346"), 0}, } } func TestSuccessfulUpload(t *testing.T) { lum := NewLayerUploadManager(maxUploadConcurrency) progressChan := make(chan progress.Progress) progressDone := make(chan struct{}) receivedProgress := make(map[string]int64) go func() { for p := range progressChan { receivedProgress[p.ID] = p.Current } close(progressDone) }() var currentUploads int32 descriptors := uploadDescriptors(¤tUploads) err := lum.Upload(context.Background(), descriptors, progress.ChanOutput(progressChan)) if err != nil { t.Fatalf("upload error: %v", err) } close(progressChan) <-progressDone } func TestCancelledUpload(t *testing.T) { lum := NewLayerUploadManager(maxUploadConcurrency) progressChan := make(chan progress.Progress) progressDone := make(chan struct{}) go func() { for range progressChan { } close(progressDone) }() ctx, cancel := context.WithCancel(context.Background()) go func() { <-time.After(time.Millisecond) cancel() }() descriptors := uploadDescriptors(nil) err := lum.Upload(ctx, descriptors, progress.ChanOutput(progressChan)) if err != context.Canceled { t.Fatal("expected upload to be cancelled") } close(progressChan) <-progressDone }