js: First testing and improvements

--

* Introduced Mocha/chai as testsuite. After development build
  'npm test' should run the unit tests. Functionality exclusive to
  Browsers/WebExtensions cannot be run this way, so some other testing
  is still needed.

  - package.json: Added required development packages
  - .babelrc indirect configuration for mocha. ES6 transpiling
    needs some babel configuration, but mocha has no setting for it.
  - test/mocha.opts Vonfiguration for mocha runs

* Fixed errors:
  - Helpers.js toKeyIdArray; isLongId is now exported
  - Key.js Key constructor failed
  - Message.js will not throw an Error during construction, a new
    message is now created with createMessage, which can return an
    Error or a GPGME_Message object

* Tests:
  - test/Helpers: exports from Helpers.js, GPGME_Error handling
  - test/Message: first init test with bad parameters

1 files changed, 42 insertions, 0 deletions

diff --git a/lang/js/test/Message.js b/lang/js/test/Message.js
new file mode 100644
index 00000000..454b8ca3
--- /dev/null
+++ b/lang/js/test/Message.js
@@ -0,0 +1,42 @@
+/* gpgme.js - Javascript integration for gpgme
+ * Copyright (C) 2018 Bundesamt für Sicherheit in der Informationstechnik
+ *
+ * This file is part of GPGME.
+ *
+ * GPGME is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as
+ * published by the Free Software Foundation; either version 2.1 of
+ * the License, or (at your option) any later version.
+ *
+ * GPGME is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this program; if not, see <http://www.gnu.org/licenses/>.
+ * SPDX-License-Identifier: LGPL-2.1+
+ */
+
+import { expect } from "../node_modules/chai/chai";
+import { GPGME_Message, createMessage } from "../src/Message";
+
+const message_params = {
+    invalid_op_action : 'dance',
+    invalid_op_type : [234, 34, '<>'],
+}
+
+describe('Message Object', function(){
+    describe('incorrect initialization', function(){
+        it('non-allowed operation', function(){
+            let test0 = createMessage(message_params.invalid_op_action);
+            expect(test0).to.be.an.instanceof(Error);
+            expect(test0.code).to.equal('MSG_WRONG_OP');
+        });
+        it('wrong parameter type in constructor', function(){
+            let test0 = createMessage(message_params.invalid_op_type);
+            expect(test0).to.be.an.instanceof(Error);
+            expect(test0.code).to.equal('PARAM_WRONG');
+        });
+    });
+});