expectedHeader.Set("host", "localhost:9000")
	if !reflect.DeepEqual(res.Header, expectedHeader) {
		t.Fatalf("Expected %#v, got %#v", expectedHeader, res.Header)
	}
}

// Test ToS3ETag()
func TestToS3ETag(t *testing.T) {
	testCases := []struct {
		etag         string
		expectedETag string
	}{
		{`"8019e762"`, `8019e762-1`},

func UTCNow() time.Time {
	return time.Now().UTC()
}

// GenETag - generate UUID based ETag
func GenETag() string {
	return ToS3ETag(getMD5Hash([]byte(mustGetUUID())))
}

// ToS3ETag - return checksum to ETag
func ToS3ETag(etag string) string {
	etag = canonicalizeETag(etag)

	if !strings.HasSuffix(etag, "-1") {
		// Tools like s3cmd uses ETag as checksum of data to validate.