add Date#toJSON, #156

build/config.js

@@ -122,6 +122,7 @@ module.exports = {
     'es6.date.now',
     'es6.date.to-string',
     'es6.date.to-iso-string',
+    'es6.date.to-json',
     'es6.typed.array-buffer',
     'es6.typed.data-view',
     'es6.typed.int8-array',
@@ -231,6 +232,7 @@ module.exports = {
     'es6.array.last-index-of',
     'es6.date.now',
     'es6.date.to-iso-string',
+    'es6.date.to-json',
     'es6.string.trim',
     'es6.regexp.to-string',
     'es6.parse-int',

es5/index.js

@@ -27,6 +27,7 @@ require('../modules/es6.array.index-of');
 require('../modules/es6.array.last-index-of');
 require('../modules/es6.date.now');
 require('../modules/es6.date.to-iso-string');
+require('../modules/es6.date.to-json');
 require('../modules/es6.parse-int');
 require('../modules/es6.parse-float');
 require('../modules/es6.string.trim');

es6/date.js

@@ -1,4 +1,5 @@
 require('../modules/es6.date.now');
 require('../modules/es6.date.to-string');
 require('../modules/es6.date.to-iso-string');
+require('../modules/es6.date.to-json');
 module.exports = Date;

es6/index.js

@@ -73,6 +73,7 @@ require('../modules/es6.string.sup');
 require('../modules/es6.date.now');
 require('../modules/es6.date.to-string');
 require('../modules/es6.date.to-iso-string');
+require('../modules/es6.date.to-json');
 require('../modules/es6.array.is-array');
 require('../modules/es6.array.from');
 require('../modules/es6.array.of');

fn/date/index.js

@@ -1,4 +1,5 @@
 require('../../modules/es6.date.now');
-require('../../modules/es6.date.to-iso-string');
 require('../../modules/es6.date.to-string');
+require('../../modules/es6.date.to-iso-string');
+require('../../modules/es6.date.to-json');
 module.exports = require('../../modules/_core').Date;

fn/date/to-json.js

@@ -0,0 +1,2 @@
+require('../../modules/es6.date.to-json');
+module.exports = require('../../modules/_core').Date.toJSON;

library/es5/index.js

@@ -27,6 +27,7 @@ require('../modules/es6.array.index-of');
 require('../modules/es6.array.last-index-of');
 require('../modules/es6.date.now');
 require('../modules/es6.date.to-iso-string');
+require('../modules/es6.date.to-json');
 require('../modules/es6.parse-int');
 require('../modules/es6.parse-float');
 require('../modules/es6.string.trim');

library/es6/date.js

@@ -1,4 +1,5 @@
 require('../modules/es6.date.now');
 require('../modules/es6.date.to-string');
 require('../modules/es6.date.to-iso-string');
+require('../modules/es6.date.to-json');
 module.exports = Date;

library/es6/index.js

@@ -73,6 +73,7 @@ require('../modules/es6.string.sup');
 require('../modules/es6.date.now');
 require('../modules/es6.date.to-string');
 require('../modules/es6.date.to-iso-string');
+require('../modules/es6.date.to-json');
 require('../modules/es6.array.is-array');
 require('../modules/es6.array.from');
 require('../modules/es6.array.of');

library/fn/date/index.js

@@ -1,4 +1,5 @@
 require('../../modules/es6.date.now');
-require('../../modules/es6.date.to-iso-string');
 require('../../modules/es6.date.to-string');
+require('../../modules/es6.date.to-iso-string');
+require('../../modules/es6.date.to-json');
 module.exports = require('../../modules/_core').Date;

library/fn/date/to-json.js

@@ -0,0 +1,2 @@
+require('../../modules/es6.date.to-json');
+module.exports = require('../../modules/_core').Date.toJSON;

library/modules/es5.js

@@ -28,6 +28,7 @@ require('./es6.array.index-of');
 require('./es6.array.last-index-of');
 require('./es6.date.now');
 require('./es6.date.to-iso-string');
+require('./es6.date.to-json');
 require('./es6.parse-int');
 require('./es6.parse-float');
 require('./es6.string.trim');

library/modules/es6.date.to-json.js

@@ -0,0 +1,14 @@
+'use strict';
+var $export     = require('./_export')
+  , toObject    = require('./_to-object')
+  , toPrimitive = require('./_to-primitive');
+
+$export($export.P + $export.F * require('./_fails')(function(){
+  return Date.prototype.toJSON.call({toISOString: function(){ return 1; }}) !== 1;
+}), 'Date', {
+  toJSON: function toJSON(key){
+    var O  = toObject(this)
+      , pv = toPrimitive(O);
+    return typeof pv == 'number' && !isFinite(pv) ? null : O.toISOString();
+  }
+});

library/shim.js

@@ -73,6 +73,7 @@ require('./modules/es6.string.sup');
 require('./modules/es6.date.now');
 require('./modules/es6.date.to-string');
 require('./modules/es6.date.to-iso-string');
+require('./modules/es6.date.to-json');
 require('./modules/es6.array.is-array');
 require('./modules/es6.array.from');
 require('./modules/es6.array.of');

modules/es5.js

@@ -28,6 +28,7 @@ require('./es6.array.index-of');
 require('./es6.array.last-index-of');
 require('./es6.date.now');
 require('./es6.date.to-iso-string');
+require('./es6.date.to-json');
 require('./es6.parse-int');
 require('./es6.parse-float');
 require('./es6.string.trim');

modules/es6.date.to-json.js

@@ -0,0 +1,14 @@
+'use strict';
+var $export     = require('./_export')
+  , toObject    = require('./_to-object')
+  , toPrimitive = require('./_to-primitive');
+
+$export($export.P + $export.F * require('./_fails')(function(){
+  return Date.prototype.toJSON.call({toISOString: function(){ return 1; }}) !== 1;
+}), 'Date', {
+  toJSON: function toJSON(key){
+    var O  = toObject(this)
+      , pv = toPrimitive(O);
+    return typeof pv == 'number' && !isFinite(pv) ? null : O.toISOString();
+  }
+});

shim.js

@@ -73,6 +73,7 @@ require('./modules/es6.string.sup');
 require('./modules/es6.date.now');
 require('./modules/es6.date.to-string');
 require('./modules/es6.date.to-iso-string');
+require('./modules/es6.date.to-json');
 require('./modules/es6.array.is-array');
 require('./modules/es6.array.from');
 require('./modules/es6.array.of');

tests/commonjs.ls

@@ -207,8 +207,9 @@ for P in <[.. ../library]>
   ok require("#P/fn/json").stringify([1]) is '[1]'
   ok require("#P/fn/json/stringify")([1]) is '[1]'
   ok typeof require("#P/fn/date/now")(new Date) is \number
-  ok typeof require("#P/fn/date/to-iso-string")(new Date) is \string
   ok typeof require("#P/fn/date/to-string")(new Date) is \string
+  ok typeof require("#P/fn/date/to-iso-string")(new Date) is \string
+  ok require("#P/fn/date/to-json")(Infinity) is null
   ok require("#P/fn/date")
   ok require("#P/fn/symbol/has-instance")
   ok require("#P/fn/symbol/is-concat-spreadable")

tests/library/es6.date.to-json.ls

@@ -0,0 +1,11 @@
+{module, test} = QUnit
+module \ES6
+
+test 'Date#toJSON' (assert)!->
+  {toJSON, toISOString} = core.Date
+  assert.isFunction toJSON
+  if Date::toISOString
+    d = new Date!
+    assert.same toJSON(d), toISOString(d), 'base'
+  assert.same toJSON(new Date NaN), null, 'not finite'
+  assert.same toJSON(toISOString: -> 42), 42, 'generic'

tests/tests/es6.date.to-iso-string.ls

@@ -3,6 +3,9 @@ module \ES6
 
 test 'Date#toISOString' (assert)!->
   assert.isFunction Date::toISOString
+  assert.arity Date::toISOString, 0
+  assert.name Date::toISOString, \toISOString
+  assert.looksNative Date::toISOString
   assert.strictEqual new Date(0).toISOString!, '1970-01-01T00:00:00.000Z'
   assert.strictEqual new Date(1e12+1).toISOString!, '2001-09-09T01:46:40.001Z'
   assert.strictEqual new Date(-5e13-1).toISOString!, '0385-07-25T07:06:39.999Z'

tests/tests/es6.date.to-json.ls

@@ -0,0 +1,12 @@
+{module, test} = QUnit
+module \ES6
+
+test 'Date#toJSON' (assert)!->
+  assert.isFunction Date::toJSON
+  assert.arity Date::toJSON, 1
+  assert.name Date::toJSON, \toJSON
+  assert.looksNative Date::toJSON
+  d = new Date!
+  assert.same d.toJSON!, d.toISOString!, 'base'
+  assert.same new Date(NaN)toJSON!, null, 'not finite'
+  assert.same Date::toJSON.call(toISOString: -> 42), 42, 'generic'

tests/tests/es6.date.to-string.ls

@@ -1,7 +1,7 @@
 {module, test} = QUnit
 module \ES6
 
-test 'Date#toString' (assert)->
+test 'Date#toString' (assert)!->
   assert.isFunction Date::toString
   assert.arity Date::toString, 0
   assert.name Date::toString, \toString