yadda/lib/RegularExpression.js

A true BDD framework for JavaScript

'use strict';

var $ = require('./Array');

// Wrapper for JavaScript Regular Expressions
var RegularExpression = function (pattern_or_regexp) {
  var groups_pattern = /(^|[^\\\\])\(.*?\)/g;
  var sets_pattern = /(^|[^\\\\])\[.*?\]/g;
  var repetitions_pattern = /(^|[^\\\\])\{.*?\}/g;
  var regex_aliases_pattern = /(^|[^\\\\])\\./g;
  var non_word_tokens_pattern = /[^\w\s]/g;
  var regexp = new RegExp(pattern_or_regexp);

  this.test = function (text) {
    var result = regexp.test(text);
    this.reset();
    return result;
  };

  this.groups = function (text) {
    var results = $();
    var match = regexp.exec(text);
    while (match) {
      var groups = match.slice(1, match.length);
      results.push(groups);
      match = regexp.global && regexp.exec(text);
    }
    this.reset();
    return results.flatten();
  };

  this.reset = function () {
    regexp.lastIndex = 0;
    return this;
  };

  this.without_expressions = function () {
    return regexp.source.replace(groups_pattern, '$1').replace(sets_pattern, '$1').replace(repetitions_pattern, '$1').replace(regex_aliases_pattern, '$1').replace(non_word_tokens_pattern, '');
  };

  this.equals = function (other) {
    return this.toString() === other.toString();
  };

  this.toString = function () {
    return '/' + regexp.source + '/';
  };
};

module.exports = RegularExpression;