}
	})

	t.Run("Persistence", func(t *testing.T) {
		tw := NewWriter(new(failOnceWriter))
		if err := tw.WriteHeader(&Header{}); err != io.ErrShortWrite {
			t.Fatalf("WriteHeader() = %v, want %v", err, io.ErrShortWrite)
		}
		if err := tw.WriteHeader(&Header{Name: "small.txt"}); err == nil {
			t.Errorf("WriteHeader() = got %v, want non-nil error", err)
		}
		if _, err := tw.Write(nil); err == nil {

	rw := httptest.NewRecorder()
	trw := &trackingResponseWriter{ResponseWriter: rw}
	trw.WriteHeader(123)
	if !trw.headerWritten {
		t.Fatal("headerWritten was not set by WriteHeader call")
	}

	_, err := trw.Write([]byte("hello"))
	if err != nil {
		t.Fatalf("Write unexpectedly failed: %v", err)
	}

	// Check that WriteHeader and Write were called on the underlying response writer
	resp := rw.Result()

    }

    private void reportErrors(Map<File, List<Error>> errors, File reportFile) {
        try (PrintWriter fw = new PrintWriter(new FileWriter(reportFile))) {
            writeHeader(fw);
            if (errors.isEmpty()) {
                fw.println("All clear!");
                return;
            }
            for (Map.Entry<File, List<Error>> e : errors.entrySet()) {

func (w *nullResponseWriter) Header() http.Header {
	return nil
}

func (w *nullResponseWriter) Write(p []byte) (int, error) {
	return len(p), nil
}

func (w *nullResponseWriter) WriteHeader(statusCode int) {
}

func (w *nullResponseWriter) Flush() {
}

func benchmarkSelect(b *testing.B, count int, query string) {
	requestXML := []byte(`
<?xml version="1.0" encoding="UTF-8"?>

		bugLogIf(context.Background(), fmt.Errorf("invalid WriteHeader code %v", statusCode))
		statusCode = http.StatusInternalServerError
	}
	setCommonHeaders(w)
	if mType != mimeNone {
		w.Header().Set(xhttp.ContentType, string(mType))
	}
	w.Header().Set(xhttp.ContentLength, strconv.Itoa(len(response)))
	w.WriteHeader(statusCode)
	if response != nil {
		w.Write(response)
	}
}

			if contextCanceled(ctx) {
				w.WriteHeader(499)
				return
			}
			f.ServeHTTP(w, r)
		case <-r.Context().Done():
			globalHTTPStats.addRequestsInQueue(-1)
			// When the client disconnects before getting the S3 handler
			// status code response, set the status code to 499 so this request
			// will be properly audited and traced.
			w.WriteHeader(499)
		default:

// Some fields may not be populated.
//
// For forward compatibility, users that retrieve a Header from Reader.Next,
// mutate it in some ways, and then pass it back to Writer.WriteHeader
// should do so by creating a new Header and copying the fields
// that they are interested in preserving.
type Header struct {
	// Typeflag is the type of header entry.

			// If the object ETag matches with the specified ETag.
			writeHeadersPrecondition(w, objInfo)
			w.WriteHeader(http.StatusNotModified)
			return true
		}
	}

	// If-Modified-Since : Return the object only if it has been modified since the specified time,
	// otherwise return a 304 (not modified).

				w.Header().Set(xhttp.AmzRequestToken, functionToken)
				w.Header().Set(xhttp.AmzFwdHeaderContentType, contentType)
				w.Header().Set(xhttp.AmzFwdStatus, strconv.Itoa(lambdaStatus))
				w.WriteHeader(lambdaStatus)
				w.Write([]byte(lambdaBody))
			}))
			defer lambdaServer.Close()

			lambdaARN := "arn:minio:s3-object-lambda::lambda1:webhook"

			cfg := config.New()

		writeErrorResponse(ctx, w, *apiErr, r.URL)
		return
	}

	if !globalAPIConfig.shouldGzipObjects() {
		w.Header().Set(gzhttp.HeaderNoCompression, "true")
	}

	w.WriteHeader(statusCode)
	io.Copy(w, resp.Body)