@owstack/bch-lib/test/transaction/unspentoutput.js

A Javascript library to build bitcoin cash and blockchain-based applications.

'use strict';

var chai = require('chai');
var expect = chai.expect;
var should = chai.should();

var owsCommon = require('@owstack/ows-common');
var bchLib = require('../..');
var UnspentOutput = bchLib.Transaction.UnspentOutput;
var lodash = owsCommon.deps.lodash;

describe('UnspentOutput', function() {

  var sampleData1 = {
    'address': 'bchtest:qzydnyc75u7kp6hhu4n3alq922u39ygl9gur0jmaup',
    'txId': 'a477af6b2667c29670467e4e0728b685ee07b240235771862318e29ddbe58458',
    'outputIndex': 0,
    'script': 'OP_DUP OP_HASH160 20 0x88d9931ea73d60eaf7e5671efc0552b912911f2a OP_EQUALVERIFY OP_CHECKSIG',
    'satoshis': 1020000
  };
  var sampleData2 = {
    'txid': 'e42447187db5a29d6db161661e4bc66d61c3e499690fe5ea47f87b79ca573986',
    'vout': 1,
    'address': 'bchtest:qqrnkl4w9q37lg6fuwu32ku2wd2jv336pul3f7qz0a',
    'scriptPubKey': '76a914073b7eae2823efa349e3b9155b8a735526463a0f88ac',
    'amount': 0.01080000
  };

  it('roundtrip from raw data', function() {
    expect(UnspentOutput(sampleData2).toObject()).to.deep.equal(sampleData2);
  });

  it('can be created without "new" operand', function() {
    expect(UnspentOutput(sampleData1) instanceof UnspentOutput).to.equal(true);
  });

  it('fails if no tx id is provided', function() {
    expect(function() {
      return new UnspentOutput({});
    }).to.throw();
  });

  it('fails if vout is not a number', function() {
    var sample = lodash.cloneDeep(sampleData2);
    sample.vout = '1';
    expect(function() {
      return new UnspentOutput(sample);
    }).to.throw();
  });

  it('displays nicely on the console', function() {
    var expected = '<UnspentOutput: a477af6b2667c29670467e4e0728b685ee07b240235771862318e29ddbe58458:0' +
                   ', satoshis: 1020000, address: bchtest:qzydnyc75u7kp6hhu4n3alq922u39ygl9gur0jmaup>';
    expect(new UnspentOutput(sampleData1).inspect()).to.equal(expected);
  });

  describe('checking the constructor parameters', function() {
    var notDefined = {
      'txId': 'a477af6b2667c29670467e4e0728b685ee07b240235771862318e29ddbe58458',
      'outputIndex': 0,
      'script': 'OP_DUP OP_HASH160 20 0x88d9931ea73d60eaf7e5671efc0552b912911f2a OP_EQUALVERIFY OP_CHECKSIG',
    };
    var zero = {
      'txId': 'a477af6b2667c29670467e4e0728b685ee07b240235771862318e29ddbe58458',
      'outputIndex': 0,
      'script': 'OP_DUP OP_HASH160 20 0x88d9931ea73d60eaf7e5671efc0552b912911f2a OP_EQUALVERIFY OP_CHECKSIG',
      'amount': 0
    };
    it('fails when no amount is defined', function() {
      expect(function() {
        return new UnspentOutput(notDefined);
      }).to.throw('Must provide an amount for the output');
    });
    it('does not fail when amount is zero', function() {
      expect(function() {
        return new UnspentOutput(zero);
      }).to.not.throw();
    });
  });

  it('toString returns txid:vout', function() {
    var expected = 'a477af6b2667c29670467e4e0728b685ee07b240235771862318e29ddbe58458:0';
    expect(new UnspentOutput(sampleData1).toString()).to.equal(expected);
  });

  it('to/from JSON roundtrip', function() {
    var utxo = new UnspentOutput(sampleData2);
    var obj = UnspentOutput.fromObject(utxo.toJSON()).toObject();
    expect(obj).to.deep.equal(sampleData2);
    var str = JSON.stringify(UnspentOutput.fromObject(obj));
    expect(JSON.parse(str)).to.deep.equal(sampleData2);
    var str2 = JSON.stringify(new UnspentOutput(JSON.parse(str)));
    expect(JSON.parse(str2)).to.deep.equal(sampleData2);
  });
});