Electrum.js: wrote some tests

bitcore.js

@@ -49,6 +49,7 @@ requireWhenAccessed('Wallet', './lib/Wallet');
 requireWhenAccessed('WalletKey', './lib/WalletKey');
 requireWhenAccessed('PeerManager', './lib/PeerManager');
 requireWhenAccessed('Message', './lib/Message');
+requireWhenAccessed('Electrum', './lib/Electrum');
 module.exports.Buffer = Buffer;
 
 if (typeof process.versions === 'undefined') {

lib/Electrum.js

@@ -27,7 +27,7 @@ Electrum.prototype.generatePubKey = function (n, for_change) {
   var y = bignum.fromBuffer(this.mpk.slice(32, 64), { size: 32 });
   var mpk_pt = new Point(x, y);
 
-  var sequence = this.getSequence(false, n);
+  var sequence = this.getSequence(for_change, n);
   var sequence_key = new Key();
   sequence_key.private = sequence.toBuffer();
   sequence_key.regenerateSync();

test/test.Electrum.js

@@ -0,0 +1,78 @@
+'use strict';
+
+var chai = chai || require('chai');
+var bitcore = bitcore || require('../bitcore');
+
+var should = chai.should();
+
+var Electrum = bitcore.Electrum;
+var Address = bitcore.Address;
+var mpk = '92eea4d2f5263651db9e3222caded1fd4c89772f79a7c03fb6afc00e9d2c9d2ed9b86c2c95fc1171e49163079dacb7f048b3c509a27a490e1df9e7128362d468';
+
+/**
+ * The hard coded values (expected public key / address hash) were retrieved
+ * by creating an Electrum wallet and looking which addresses were generated for
+ * master public key mpk. Not very rigorous but it will help catch regressions.
+ */
+describe('Electrum', function() {
+  it('should initialze the main object', function() {
+    should.exist(Electrum);
+  });
+  it('should be able to create instance', function() {
+    var elec = new Electrum(mpk);
+    should.exist(elec);
+  });
+  it('should be able to call generatePubKey', function() {
+    var elec = new Electrum(mpk);
+    (function () {
+      elec.generatePubKey(0);
+    }).should.not.throw(Error);
+  });
+  it('should be able to call generateChangePubKey', function() {
+    var elec = new Electrum(mpk);
+    (function () {
+      elec.generateChangePubKey(0);
+    }).should.not.throw(Error);
+  });
+  it('should generate correct public key at sequence 0', function() {
+    var elec = new Electrum(mpk);
+    var pubkey = elec.generatePubKey(0);
+    var addr = Address.fromPubKey(pubkey);
+    addr.as('base58').should.equal('15Ur7LV4hZFvFYQHkB12g1mdnKuHyHBDiW');
+  });
+  it('should generate correct (change) public keys at sequence 0,1,2', function() {
+    var expected_values = {
+      receiving: [
+        '15Ur7LV4hZFvFYQHkB12g1mdnKuHyHBDiW',
+        '19K48MhyXK4qChGCUJzAHxLFjbQRg9tb9F',
+        '1EfoxVmRVzYf1a1WELv2qMvEEpu2u5pXsy'
+      ],
+      change: [
+        '138EGyTTyXFuqWBr8Jd7qmPbnfJUFmmuQg',
+        '12H7HZhtn7aNpTySXysKXiyxULybMktukh',
+        '1KMEUhmmiSdjX9fsv8aCAiYnVZnTTjqx7W'
+      ]
+    };
+    var elec = new Electrum(mpk);
+
+    var pubkey, addr, addr_change;
+
+    for (var i = 0; i < expected_values.receiving.length; i++) {
+      //receiving
+      pubkey = elec.generatePubKey(i);
+      addr = Address.fromPubKey(pubkey);
+      addr.as('base58').should.equal(expected_values.receiving[i]);
+
+      //change
+      pubkey = elec.generateChangePubKey(i);
+      addr = Address.fromPubKey(pubkey);
+      console.log('change');
+      addr.as('base58').should.equal(expected_values.change[i]);
+    }
+  });
+});
+
+
+
+
+