| 449 | } |
| 450 | |
| 451 | func TestEvent_Msg_ErrorHandlerNil(t *testing.T) { |
| 452 | // Save original ErrorHandler and restore after test |
| 453 | originalErrorHandler := ErrorHandler |
| 454 | ErrorHandler = nil |
| 455 | defer func() { ErrorHandler = originalErrorHandler }() |
| 456 | |
| 457 | // Create a LevelWriter that always returns an error |
| 458 | mockWriter := &badLevelWriter{err: errors.New("write error")} |
| 459 | |
| 460 | e := newEvent(mockWriter, InfoLevel, false, nil, nil) |
| 461 | if e == nil { |
| 462 | t.Fatal("Event should not be nil") |
| 463 | } |
| 464 | |
| 465 | // Capture stderr |
| 466 | oldStderr := os.Stderr |
| 467 | r, w, err := os.Pipe() |
| 468 | if err != nil { |
| 469 | t.Fatal(err) |
| 470 | } |
| 471 | os.Stderr = w |
| 472 | |
| 473 | // Call Msg to trigger write error |
| 474 | e.Msg("test message") |
| 475 | |
| 476 | // Restore stderr and read captured output |
| 477 | w.Close() |
| 478 | os.Stderr = oldStderr |
| 479 | captured, err := io.ReadAll(r) |
| 480 | if err != nil { |
| 481 | t.Fatal(err) |
| 482 | } |
| 483 | |
| 484 | // Assert the error message was printed to stderr |
| 485 | expected := "zerolog: could not write event: write error\n" |
| 486 | if string(captured) != expected { |
| 487 | t.Errorf("Expected stderr output %q, got %q", expected, string(captured)) |
| 488 | } |
| 489 | } |
| 490 | |
| 491 | type mockLogObjectMarshaler struct { |
| 492 | data string |