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| package main_test | |
| import ( | |
| "fmt" | |
| "io" | |
| "runtime" | |
| "testing" | |
| "time" | |
| ) | |
| type Error string | |
| func (e Error) Error() string { return string(e) } | |
| const CustomError = Error("CustomError") | |
| func init() { | |
| fmt.Printf("Version: %s - GOOS: %s - Arch: %s\n", runtime.Version(), runtime.GOOS, runtime.GOARCH) | |
| } | |
| // This works as expected | |
| func TestNoError(t *testing.T) { | |
| pr, pw := io.Pipe() | |
| go func() { | |
| defer pw.Close() | |
| time.Sleep(1 * time.Second) | |
| if _, err := pw.Write([]byte("hello")); err != nil { | |
| panic(err) | |
| } | |
| }() | |
| var buffer []byte | |
| if _, err := pr.Read(buffer); err != nil { | |
| t.Errorf("expected: nil, got: %v", err) | |
| } | |
| } | |
| // This also works as expected | |
| func TestOneErrorBad(t *testing.T) { | |
| pr, pw := io.Pipe() | |
| go func() { | |
| defer pw.Close() | |
| pw.CloseWithError(CustomError) | |
| time.Sleep(1 * time.Second) | |
| }() | |
| var buffer []byte | |
| if _, err := pr.Read(buffer); err != CustomError { | |
| t.Errorf("expected: %v, got: %v", CustomError, err) | |
| } | |
| if _, err := pr.Read(buffer); err != CustomError { | |
| t.Errorf("expected: %v, got: %v", CustomError, err) | |
| } | |
| } | |
| // This returns two different errors | |
| func TestOneErrorGoodAfterLongTime(t *testing.T) { | |
| pr, pw := io.Pipe() | |
| go func() { | |
| pw.CloseWithError(CustomError) | |
| time.Sleep(1 * time.Second) | |
| defer pw.Close() | |
| }() | |
| var buffer []byte | |
| if _, err := pr.Read(buffer); err != CustomError { | |
| t.Errorf("expected: %v, got: %v", CustomError, err) | |
| } | |
| time.Sleep(3 * time.Second) /* May represent expensive work */ | |
| if _, err := pr.Read(buffer); err != CustomError { | |
| t.Errorf("expected: %v, got: %v", CustomError, err) | |
| } | |
| } | |
| // This returns the EOF error which also shows it's not just the first error | |
| // encountered | |
| func TestOneErrorGoodAfterOtherLongTime(t *testing.T) { | |
| pr, pw := io.Pipe() | |
| go func() { | |
| pw.CloseWithError(CustomError) | |
| time.Sleep(1 * time.Second) | |
| defer pw.Close() | |
| }() | |
| var buffer []byte | |
| time.Sleep(3 * time.Second) /* May represent expensive work */ | |
| if _, err := pr.Read(buffer); err != CustomError { | |
| t.Errorf("expected: %v, got: %v", CustomError, err) | |
| } | |
| } |
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| Version: go1.13.4 - GOOS: darwin - Arch: amd64 | |
| === RUN TestNoError | |
| --- PASS: TestNoError (1.05s) | |
| === RUN TestOneErrorBad | |
| --- PASS: TestOneErrorBad (0.00s) | |
| === RUN TestOneErrorGoodAfterLongTime | |
| --- FAIL: TestOneErrorGoodAfterLongTime (3.07s) | |
| main_test.go:71: expected: CustomError, got: EOF | |
| === RUN TestOneErrorGoodAfterOtherLongTime | |
| --- FAIL: TestOneErrorGoodAfterOtherLongTime (3.07s) | |
| main_test.go:88: expected: CustomError, got: EOF | |
| FAIL | |
| FAIL github.com/frankywahl/tmp 7.200s | |
| FAIL |
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| Version: go1.13.4 - GOOS: linux - Arch: amd64 | |
| === RUN TestNoError | |
| --- PASS: TestNoError (1.00s) | |
| === RUN TestOneErrorBad | |
| --- PASS: TestOneErrorBad (0.00s) | |
| === RUN TestOneErrorGoodAfterLongTime | |
| --- FAIL: TestOneErrorGoodAfterLongTime (3.00s) | |
| main_test.go:71: expected: CustomError, got: EOF | |
| === RUN TestOneErrorGoodAfterOtherLongTime | |
| --- FAIL: TestOneErrorGoodAfterOtherLongTime (3.00s) | |
| main_test.go:88: expected: CustomError, got: EOF | |
| FAIL | |
| FAIL _/go 7.014s | |
| FAIL |
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