tosource-polyfill/test.js

Firefox toSource() function polyfill for browser and Node.js

var assert = require('assert')

var toSource = require('./index')


// Various types
var date = new Date
var v = toSource(
  [ 4, 5, 6, "hello", {
    a:2,
    'b':3,
    '1':4,
    'if':5,
    yes:true,
    no:false,
    nan:NaN,
    infinity:Infinity,
    'undefined':undefined,
    'null':null,
    foo: function(bar) {
      console.log("woo! a is "+a)
      console.log("and bar is "+bar)
    }
  },
  /we$/gi,
  date,
  new Date("Wed, 09 Aug 1995 00:00:00 GMT")]
);

assert.equal(
  v,
  "[\n"+
  "  4,\n"+
  "  5,\n"+
  "  6,\n"+
  "  \"hello\",\n"+
  "  {\n"+
  "    \"1\": 4,\n"+
  "    a: 2,\n"+
  "    b: 3,\n"+
  "    \"if\": 5,\n"+
  "    yes: true,\n"+
  "    no: false,\n"+
  "    nan: NaN,\n"+
  "    infinity: Infinity,\n"+
  "    \"undefined\": undefined,\n"+
  "    \"null\": null,\n"+
  "    foo: function (bar) {\n"+
  "      console.log(\"woo! a is \"+a)\n"+
  "      console.log(\"and bar is \"+bar)\n"+
  "    }\n"+
  "  },\n"+
  "  /we$/gi,\n"+
  "  new Date("+date.getTime()+"),\n"+
  "  new Date(807926400000)\n"+
  "]"
)

// Filter parameter (applies to every object recursively before serializing)
assert.equal(
  toSource(
    [ 4, 5, 6, { bar:3 } ],
    function numbersToStrings(value) {
      return typeof value == 'number' ? '<'+value+'>' : value
    }
  ),
  "[\n"+
  "  \"<4>\",\n"+
  "  \"<5>\",\n"+
  "  \"<6>\",\n"+
  "  {bar: \"<3>\"}\n"+
  "]"
)

// No indent
assert.equal(
  toSource([ 4, 5, 6, { bar:3 } ], null, false ),
  "[4,5,6,{bar: 3}]"
)

// Circular reference
var object = {a:1, b:2}
object.c = object

assert.equal(
  toSource(object),
  "{\n"+
  "  a: 1,\n"+
  "  b: 2,\n"+
  "  c: {$circularReference:0}\n"+
  "}"
)

// Not a circular reference
foo = {}
object = {a:foo, b:foo}

assert.equal(
  toSource(object),
  "{\n"+
  "  a: {},\n"+
  "  b: {}\n"+
  "}"
)