[#302] pkg/token: Document default values set in NewBearerToken

Signed-off-by: Pavel Karpy <carpawell@nspcc.ru>

pkg/token/bearer.go

@@ -99,6 +99,15 @@ func (b *BearerToken) Issuer() *owner.ID {
 	return owner.NewIDFromNeo3Wallet(wallet)
 }
 
+// NewBearerToken creates and initializes blank BearerToken.
+//
+// Defaults:
+//  - signature: nil;
+//  - eacl: nil;
+//  - ownerID: nil;
+//  - exp: 0;
+//  - nbf: 0;
+//  - iat: 0.
 func NewBearerToken() *BearerToken {
 	b := new(BearerToken)
 	b.token = acl.BearerToken{}

pkg/token/bearer_test.go

@@ -63,3 +63,20 @@ func TestBearerToken_ToV2(t *testing.T) {
 		require.Nil(t, x.ToV2())
 	})
 }
+
+func TestNewBearerToken(t *testing.T) {
+	t.Run("default values", func(t *testing.T) {
+		tkn := token.NewBearerToken()
+
+		// convert to v2 message
+		tknV2 := tkn.ToV2()
+
+		require.NotNil(t, tknV2.GetBody())
+		require.Zero(t, tknV2.GetBody().GetLifetime().GetExp())
+		require.Zero(t, tknV2.GetBody().GetLifetime().GetNbf())
+		require.Zero(t, tknV2.GetBody().GetLifetime().GetIat())
+		require.Nil(t, tknV2.GetBody().GetEACL())
+		require.Nil(t, tknV2.GetBody().GetOwnerID())
+		require.Nil(t, tknV2.GetSignature())
+	})
+}