increase coverage for Input and Output, fix some bugs

lib/transaction/input/input.js

@@ -1,6 +1,7 @@
 'use strict';
 
 var _ = require('lodash');
+var $ = require('../../util/preconditions');
 var errors = require('../../errors');
 var BufferWriter = require('../../encoding/bufferwriter');
 var buffer = require('buffer');
@@ -10,6 +11,9 @@ var Script = require('../../script');
 var Sighash = require('../sighash');
 var Output = require('../output');
 
+
+var DEFAULT_SEQNUMBER = 0xFFFFFFFF;
+
 function Input(params) {
   if (!(this instanceof Input)) {
     return new Input(params);
@@ -19,6 +23,8 @@ function Input(params) {
   }
 }
 
+Input.DEFAULT_SEQNUMBER = DEFAULT_SEQNUMBER;
+
 Object.defineProperty(Input.prototype, 'script', {
   configurable: false,
   writeable: false,
@@ -37,9 +43,10 @@ Input.prototype._fromObject = function(params) {
   }
   this.output = params.output ?
     (params.output instanceof Output ? params.output : new Output(params.output)) : undefined;
-  this.prevTxId = params.prevTxId;
-  this.outputIndex = params.outputIndex;
-  this.sequenceNumber = params.sequenceNumber;
+  this.prevTxId = params.prevTxId || params.txidbuf;
+  this.outputIndex = _.isUndefined(params.outputIndex) ? params.txoutnum : params.outputIndex;
+  this.sequenceNumber = _.isUndefined(params.sequenceNumber) ?
+    (_.isUndefined(params.seqnum) ? DEFAULT_SEQNUMBER : params.seqnum) : params.sequenceNumber;
   if (_.isUndefined(params.script) && _.isUndefined(params.scriptBuffer)) {
     throw new errors.Transaction.Input.MissingScript();
   }
@@ -57,21 +64,19 @@ Input.prototype.toObject = function toObject() {
   };
 };
 
+Input.fromObject = function(obj) {
+  $.checkArgument(_.isObject(obj));
+  var input = new Input();
+  return input._fromObject(obj);
+};
+
 Input.prototype.toJSON = function toJSON() {
   return JSON.stringify(this.toObject());
 };
 
 Input.fromJSON = function(json) {
-  if (JSUtil.isValidJSON(json)) {
-    json = JSON.parse(json);
-  }
-  return new Input({
-    output: json.output ? new Output(json.output) : undefined,
-    prevTxId: json.prevTxId || json.txidbuf,
-    outputIndex: _.isUndefined(json.outputIndex) ? json.txoutnum : json.outputIndex,
-    sequenceNumber: json.sequenceNumber || json.seqnum,
-    scriptBuffer: new Script(json.script, 'hex')
-  });
+  $.checkArgument(JSUtil.isValidJSON(json), 'Invalid JSON provided to Input.fromJSON');
+  return Input.fromObject(JSON.parse(json));
 };
 
 Input.fromBufferReader = function(br) {
@@ -107,7 +112,7 @@ Input.prototype.setScript = function(script) {
     this._script = null;
     this._scriptBuffer = new buffer.Buffer(script);
   } else {
-    throw new TypeError('Invalid Argument');
+    throw new TypeError('Invalid argument type: script');
   }
   return this;
 };
@@ -163,9 +168,7 @@ Input.prototype.isNull = function() {
 };
 
 Input.prototype._estimateSize = function() {
-  var bufferWriter = new BufferWriter();
-  this.toBufferWriter(bufferWriter);
-  return bufferWriter.toBuffer().length;
+  return this.toBufferWriter().toBuffer().length;
 };
 
 module.exports = Input;

lib/transaction/output.js

@@ -77,7 +77,7 @@ Output.fromJSON = function(json) {
     json = JSON.parse(json);
   }
   return new Output({
-    satoshis: json.satoshis || -(-json.valuebn),
+    satoshis: json.satoshis || +json.valuebn,
     script: new Script(json.script)
   });
 };
@@ -93,7 +93,7 @@ Output.prototype.setScript = function(script) {
     this._scriptBuffer = script;
     this._script = null;
   } else {
-    throw new TypeError('Unrecognized Argument');
+    throw new TypeError('Invalid argument type: script');
   }
   return this;
 };

lib/transaction/transaction.js

@@ -60,7 +60,6 @@ function Transaction(serialized) {
 
 var CURRENT_VERSION = 1;
 var DEFAULT_NLOCKTIME = 0;
-var DEFAULT_SEQNUMBER = 0xFFFFFFFF;
 
 // Minimum amount for an output for it not to be considered a dust output
 Transaction.DUST_AMOUNT = 546;
@@ -516,7 +515,6 @@ Transaction.prototype._fromNonP2SH = function(utxo) {
     }),
     prevTxId: utxo.txId,
     outputIndex: utxo.outputIndex,
-    sequenceNumber: DEFAULT_SEQNUMBER,
     script: Script.empty()
   }));
 };
@@ -532,7 +530,6 @@ Transaction.prototype._fromMultisigUtxo = function(utxo, pubkeys, threshold) {
     }),
     prevTxId: utxo.txId,
     outputIndex: utxo.outputIndex,
-    sequenceNumber: DEFAULT_SEQNUMBER,
     script: Script.empty()
   }, pubkeys, threshold));
 };

test/transaction/input/input.js

@@ -30,6 +30,14 @@ describe('Transaction.Input', function() {
     script: new Script(),
     satoshis: 1000000
   };
+  var coinbaseJSON = '{"prevTxId":"0000000000000000000000000000000000000000000000000000000000000000"' +
+    ',"outputIndex":4294967295,"script":""}';
+  var otherJSON = '{"txidbuf":"a477af6b2667c29670467e4e0728b685ee07b240235771862318e29ddbe58458"' +
+    ',"txoutnum":0,"seqnum":4294967295,"script":"71 0x3044022006553276ec5b885ddf5cc1d7' +
+    '9e1e3dadbb404b60ad4cc00318e215654f13242102200757c17b36e3d0492fb9cf597032e5afbea67a59274e64af' +
+    '5a05d12e5ea2303901 33 0x0223078d2942df62c45621d209fab84ea9a7a23346201b7727b9b45a29c4e76f5e",' +
+    '"output":{"satoshis":100000,"script":"OP_DUP OP_HASH160 20 0x88d9931ea73d60eaf7e5671efc0552b' +
+    '912911f2a OP_EQUALVERIFY OP_CHECKSIG"}}';
 
   it('has abstract methods: "getSignatures", "isFullySigned", "addSignature", "clearSignatures"', function() {
     var input = new Input(output);
@@ -41,6 +49,39 @@ describe('Transaction.Input', function() {
   });
   it('detects coinbase transactions', function() {
     new Input(output).isNull().should.equal(false);
-    new Input(coinbase).isNull().should.equal(true);
+    var ci = new Input(coinbase);
+    ci.isNull().should.equal(true);
+  });
+
+  describe('instantiation', function() {
+    it('works without new', function() {
+      var input = Input();
+      should.exist(input);
+    });
+    it('fails with no script info', function() {
+      expect(function() {
+        var input = new Input({});
+        input.toString();
+      }).to.throw('Need a script to create an input');
+    });
+    it('fromJSON', function() {
+      var input = Input.fromJSON(coinbaseJSON);
+      var otherInput = Input.fromJSON(otherJSON);
+      should.exist(input);
+      should.exist(otherInput);
+    });
+    it('fromObject', function() {
+      var input = Input.fromJSON(coinbaseJSON);
+      var obj = input.toObject();
+      obj.script = new Buffer(obj.script, 'hex');
+      Input.fromObject(obj).should.deep.equal(input);
+      obj.script = 42;
+      Input.fromObject.bind(null, obj).should.throw('Invalid argument type: script');
+    });
+  });
+
+  it('_estimateSize', function() {
+    var input = new Input(output);
+    input._estimateSize().should.equal(66);
   });
 });

test/transaction/output.js

@@ -17,10 +17,16 @@ var errors = bitcore.errors;
 
 describe('Output', function() {
 
-  var output = new Output({satoshis: 0, script: Script.empty()});
+  var output = new Output({
+    satoshis: 0,
+    script: Script.empty()
+  });
 
   it('can be assigned a satoshi amount in big number', function() {
-    var newOutput = new Output({satoshis: new BN(100), script: Script.empty()});
+    var newOutput = new Output({
+      satoshis: new BN(100),
+      script: Script.empty()
+    });
     newOutput.satoshis.should.equal(100);
   });
 
@@ -37,7 +43,10 @@ describe('Output', function() {
   });
 
   it('roundtrips to/from object', function() {
-    var newOutput = new Output({satoshis: 50, script: new Script().add(0)});
+    var newOutput = new Output({
+      satoshis: 50,
+      script: new Script().add(0)
+    });
     var otherOutput = new Output(newOutput.toObject());
     expectEqualOutputs(newOutput, otherOutput);
   });
@@ -47,8 +56,30 @@ describe('Output', function() {
     newOutput.setScript(Script().add(0).toBuffer());
     newOutput.inspect().should.equal('<Output (0 sats) <Script: OP_0>>');
   });
-  
+
   it('has a inspect property', function() {
     output.inspect().should.equal('<Output (0 sats) <Script: >>');
   });
+
+  var output2 = new Output({
+    satoshis: 1100000000,
+    script: new Script('OP_2 21 0x038282263212c609d9ea2a6e3e172de238d8c39' +
+      'cabd5ac1ca10646e23fd5f51508 21 0x038282263212c609d9ea2a6e3e172de23' +
+      '8d8c39cabd5ac1ca10646e23fd5f51508 OP_2 OP_CHECKMULTISIG OP_EQUAL')
+  });
+  it('toBufferWriter', function() {
+    output2.toBufferWriter().toBuffer().toString('hex')
+      .should.equal('00ab904100000000485215038282263212c609d9ea2a6e3e172de2' +
+        '38d8c39cabd5ac1ca10646e23fd5f5150815038282263212c609d9ea2a6e3e172d' +
+        'e238d8c39cabd5ac1ca10646e23fd5f5150852ae87');
+  });
+  it('to/from JSON', function() {
+    var json = output2.toJSON();
+    var o3 = new Output(json);
+    o3.toJSON().should.equal(json);
+  });
+  it('setScript fails with invalid input', function() {
+    var out = new Output(output2.toJSON());
+    out.setScript.bind(out, 45).should.throw('Invalid argument type: script');
+  });
 });