Floor credential validity to epoch boundary in issuance unit tests

attributes.go

@@ -256,6 +256,13 @@ func (attr *MetadataAttribute) IsValid() bool {
 	return attr.IsValidOn(time.Now())
 }
 
+// FloorToEpochBoundary returns the greatest time not greater than the argument
+// that falls on the boundary of an epoch for attribute validity or expiry,
+// of which the value is defined by ExpiryFactor (one week).
+func FloorToEpochBoundary(t time.Time) time.Time {
+	return time.Unix((t.Unix()/ExpiryFactor)*ExpiryFactor, 0)
+}
+
 func (attr *MetadataAttribute) field(field metadataField) []byte {
 	return attr.Bytes()[field.offset : field.offset+field.length]
 }

irmaclient/session_test.go

@@ -106,7 +106,7 @@ func getSigningJwt(name string, id irma.AttributeTypeIdentifier) interface{} {
 }
 
 func getIssuanceRequest(defaultValidity bool) *irma.IssuanceRequest {
-	temp := irma.Timestamp(time.Now().AddDate(1, 0, 0))
+	temp := irma.Timestamp(irma.FloorToEpochBoundary(time.Now().AddDate(1, 0, 0)))
 	var expiry *irma.Timestamp
 	credid1 := irma.NewCredentialTypeIdentifier("irma-demo.RU.studentCard")
 	credid2 := irma.NewCredentialTypeIdentifier("irma-demo.MijnOverheid.root")