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Add succ method for Date object #102

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Add succ method for Date object #102

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11 changes: 11 additions & 0 deletions src/prototype/lang/date.js
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Original file line number Diff line number Diff line change
Expand Up @@ -48,9 +48,20 @@
function toJSON() {
return this.toISOString();
}

/**
* Date#succ() -> Date
*
* Returns the successor of the current [[Date]], as defined by current + one day.
* Used to make dates compatible with [[ObjectRange]].
**/
function succ() {
return new Date(this.getTime() + 86400000);
}

if (!proto.toISOString) proto.toISOString = toISOString;
if (!proto.toJSON) proto.toJSON = toJSON;
if (!proto.succ) proto.succ = succ;

})(Date.prototype);

5 changes: 5 additions & 0 deletions test/unit/date_test.js
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Expand Up @@ -5,5 +5,10 @@ new Test.Unit.Runner({

testDateToISOString: function() {
this.assertMatch(/^1970-01-01T00:00:00(\.000)?Z$/, new Date(Date.UTC(1970, 0, 1)).toISOString());
},

testSucc: function() {
this.assertEqual((new Date(2016, 1, 29)).succ().getTime(), (new Date(2016, 2, 1)).getTime());
}

});
6 changes: 6 additions & 0 deletions test/unit/range_test.js
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Expand Up @@ -11,6 +11,12 @@ new Test.Unit.Runner({
this.assert($R(0, 5, false).include(0));
this.assert($R(0, 5, false).include(5));
this.assert(!$R(0, 5, false).include(6));

var a = new Date(2013, 0, 1);
var b = new Date(2014, 1, 1);
this.assert($R(a, b).include(b));
this.assert($R(a, b).include(new Date(2013, 1, 1)));
this.assert(!$R(a, b, true).include(b));
},

testEach: function() {
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