karma/client/stringify.js

Spectacular Test Runner for JavaScript.

var instanceOf = require('./util').instanceOf;

var stringify = function stringify(obj, depth) {

  if (depth === 0) {
    return '...';
  }

  if (obj === null) {
    return 'null';
  }

  switch (typeof obj) {
  case 'string':
    return '\'' + obj + '\'';
  case 'undefined':
    return 'undefined';
  case 'function':
    return obj.toString().replace(/\{[\s\S]*\}/, '{ ... }');
  case 'boolean':
    return obj ? 'true' : 'false';
  case 'object':
    var strs = [];
    if (instanceOf(obj, 'Array')) {
      strs.push('[');
      for (var i = 0, ii = obj.length; i < ii; i++) {
        if (i) {
          strs.push(', ');
        }
        strs.push(stringify(obj[i], depth - 1));
      }
      strs.push(']');
    } else if (instanceOf(obj, 'Date')) {
      return obj.toString();
    } else if (instanceOf(obj, 'Text')) {
      return obj.nodeValue;
    } else if (instanceOf(obj, 'Comment')) {
      return '<!--' + obj.nodeValue + '-->';
    } else if (obj.outerHTML) {
      return obj.outerHTML;
    } else {
      strs.push(obj.constructor.name);
      strs.push('{');
      var first = true;
      for(var key in obj) {
        if (obj.hasOwnProperty(key)) {
          if (first) { first = false; } else { strs.push(', '); }
          strs.push(key + ': ' + stringify(obj[key], depth - 1));
        }
      }
      strs.push('}');
    }
    return strs.join('');
  default:
    return obj;
  }
};


module.exports = stringify;