chai/lib/error.js

/*!
 * chai
 * Copyright(c) 2011 Jake Luer <jake@alogicalparadox.com>
 * MIT Licensed
 */

var fail = require('./chai').fail;

module.exports = AssertionError;

/*!
 * Inspired by node.js assert module
 * https://github.com/joyent/node/blob/f8c335d0caf47f16d31413f89aa28eda3878e3aa/lib/assert.js
 */
function AssertionError (options) {
  options = options || {};
  this.name = 'AssertionError';
  this.message = options.message;
  this.actual = options.actual;
  this.expected = options.expected;
  this.operator = options.operator;
  var stackStartFunction = options.stackStartFunction || fail;

  if (Error.captureStackTrace) {
    Error.captureStackTrace(this, stackStartFunction);
  }
}

AssertionError.prototype.__proto__ = Error.prototype;

AssertionError.prototype.summary = function() {
  var str = '';

  if (this.operator) {
    str += 'In: \'' + this.operator + '\'\n\t';
  }

  str += '' + this.name + (this.message ? ': ' + this.message : '');

  return str;
};

AssertionError.prototype.details = function() {
  return this.summary();
};

AssertionError.prototype.toString = function() {
  return this.summary();
};