}

// CertUtilImpl is the implementation of CertUtil, for production use.
type CertUtilImpl struct {
	gracePeriodPercentage int
}

// NewCertUtil returns a new CertUtilImpl
func NewCertUtil(gracePeriodPercentage int) CertUtilImpl {
	return CertUtilImpl{
		gracePeriodPercentage: gracePeriodPercentage,
	}
}

		},
		"Invalid cert pem": {
			cert:        []byte(`INVALIDCERT`),
			now:         time.Date(2017, time.August, 23, 21, 0, 0, 40, time.UTC),
			expectedErr: "invalid PEM encoded certificate",
		},
	}

	cu := NewCertUtil(50) // Grace period percentage is set to 50
	for id, c := range testCases {
		waitTime, err := cu.GetWaitTime(c.cert, c.now)
		if c.expectedErr != "" {
			if err == nil {
				t.Errorf("%s: no error is returned.", id)