package progress // import "github.com/docker/docker/pkg/progress" import ( "bytes" "io" "testing" ) func TestOutputOnPrematureClose(t *testing.T) { content := []byte("TESTING") reader := io.NopCloser(bytes.NewReader(content)) progressChan := make(chan Progress, 10) pr := NewProgressReader(reader, ChanOutput(progressChan), int64(len(content)), "Test", "Read") part := make([]byte, 4) _, err := io.ReadFull(pr, part) if err != nil { pr.Close() t.Fatal(err) } drainLoop: for { select { case <-progressChan: default: break drainLoop } } pr.Close() select { case <-progressChan: default: t.Fatalf("Expected some output when closing prematurely") } } func TestCompleteSilently(t *testing.T) { content := []byte("TESTING") reader := io.NopCloser(bytes.NewReader(content)) progressChan := make(chan Progress, 10) pr := NewProgressReader(reader, ChanOutput(progressChan), int64(len(content)), "Test", "Read") out, err := io.ReadAll(pr) if err != nil { pr.Close() t.Fatal(err) } if string(out) != "TESTING" { pr.Close() t.Fatalf("Unexpected output %q from reader", string(out)) } drainLoop: for { select { case <-progressChan: default: break drainLoop } } pr.Close() select { case <-progressChan: t.Fatalf("Should have closed silently when read is complete") default: } }