add unit test for crypto/pki/utils.go

crypto/pki/utils_test.go

@@ -0,0 +1,25 @@
+package pki
+
+import (
+	"github.com/harmony-one/harmony/crypto"
+	"reflect"
+	"testing"
+	"time"
+)
+
+func TestGetPublicKeyFromPrivateKey(test *testing.T) {
+	suite := crypto.Ed25519Curve
+	t := time.Now().UnixNano()
+	scalar := suite.Scalar().SetInt64(t)
+	pubKey := GetPublicKeyFromScalar(scalar)
+	bytes := [32]byte{}
+	tmp, err := scalar.MarshalBinary()
+	copy(bytes[:], tmp)
+	if err != nil {
+		test.Error("unable to marshal private key to binary")
+	}
+	pubKey1 := GetPublicKeyFromPrivateKey(bytes)
+	if !reflect.DeepEqual(pubKey, pubKey1) {
+		test.Error("two public keys should be equal")
+	}
+}