| 446 | } |
| 447 | |
| 448 | func TestFilterByFirstLineOnlyGivesFirstLineOfInput(t *testing.T) { |
| 449 | t.Parallel() |
| 450 | p := script.Echo("hello\nworld").Filter(func(r io.Reader, w io.Writer) error { |
| 451 | scanner := bufio.NewScanner(r) |
| 452 | for scanner.Scan() { |
| 453 | fmt.Fprintln(w, scanner.Text()) |
| 454 | break |
| 455 | } |
| 456 | return scanner.Err() |
| 457 | }) |
| 458 | want := "hello\n" |
| 459 | got, err := p.String() |
| 460 | if err != nil { |
| 461 | t.Fatal(err) |
| 462 | } |
| 463 | if want != got { |
| 464 | t.Error(cmp.Diff(want, got)) |
| 465 | } |
| 466 | } |
| 467 | |
| 468 | func TestFilterSetsErrorOnPipeIfFilterFuncReturnsError(t *testing.T) { |
| 469 | t.Parallel() |