test/mjsunit/date.js

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// Test date construction from other dates.
var date0 = new Date(1111);
var date1 = new Date(date0);
assertEquals(1111, date0.getTime());
assertEquals(date0.getTime(), date1.getTime());
var date2 = new Date(date0.toString());
assertEquals(1000, date2.getTime());

// Test that dates may contain commas.
var date0 = Date.parse("Dec 25 1995 1:30");
var date1 = Date.parse("Dec 25, 1995 1:30");
var date2 = Date.parse("Dec 25 1995, 1:30");
var date3 = Date.parse("Dec 25, 1995, 1:30");
assertEquals(date0, date1);
assertEquals(date1, date2);
assertEquals(date2, date3);

// Test limits (+/-1e8 days from epoch)

var dMax = new Date(8.64e15);
assertEquals(8.64e15, dMax.getTime());
assertEquals(275760, dMax.getFullYear());
assertEquals(8, dMax.getMonth());
assertEquals(13, dMax.getUTCDate());

var dOverflow = new Date(8.64e15+1);
assertTrue(isNaN(dOverflow.getTime()));

var dMin = new Date(-8.64e15);
assertEquals(-8.64e15, dMin.getTime());
assertEquals(-271821, dMin.getFullYear());
assertEquals(3, dMin.getMonth());
assertEquals(20, dMin.getUTCDate());

var dUnderflow = new Date(-8.64e15-1);
assertTrue(isNaN(dUnderflow.getTime()));


// Tests inspired by js1_5/Date/regress-346363.js

// Year
var a = new Date();
a.setFullYear();
a.setFullYear(2006);
assertEquals(2006, a.getFullYear());

var b = new Date();
b.setUTCFullYear();
b.setUTCFullYear(2006);
assertEquals(2006, b.getUTCFullYear());

// Month
var c = new Date();
c.setMonth();
c.setMonth(2);
assertTrue(isNaN(c.getMonth()));

var d = new Date();
d.setUTCMonth();
d.setUTCMonth(2);
assertTrue(isNaN(d.getUTCMonth()));

// Date
var e = new Date();
e.setDate();
e.setDate(2);
assertTrue(isNaN(e.getDate()));

var f = new Date();
f.setUTCDate();
f.setUTCDate(2);
assertTrue(isNaN(f.getUTCDate()));

// Hours
var g = new Date();
g.setHours();
g.setHours(2);
assertTrue(isNaN(g.getHours()));

var h = new Date();
h.setUTCHours();
h.setUTCHours(2);
assertTrue(isNaN(h.getUTCHours()));

// Minutes
var g = new Date();
g.setMinutes();
g.setMinutes(2);
assertTrue(isNaN(g.getMinutes()));

var h = new Date();
h.setUTCHours();
h.setUTCHours(2);
assertTrue(isNaN(h.getUTCHours()));


// Seconds
var i = new Date();
i.setSeconds();
i.setSeconds(2);
assertTrue(isNaN(i.getSeconds()));

var j = new Date();
j.setUTCSeconds();
j.setUTCSeconds(2);
assertTrue(isNaN(j.getUTCSeconds()));


// Milliseconds
var k = new Date();
k.setMilliseconds();
k.setMilliseconds(2);
assertTrue(isNaN(k.getMilliseconds()));

var l = new Date();
l.setUTCMilliseconds();
l.setUTCMilliseconds(2);
assertTrue(isNaN(l.getUTCMilliseconds()));

// Test that toLocaleTimeString only returns the time portion of the
// date without the timezone information.
function testToLocaleTimeString() {
  var d = new Date();
  var s = d.toLocaleTimeString();
  assertEquals(8, s.length);
}

testToLocaleTimeString();

// Test that -0 is treated correctly in MakeDay.
var d = new Date();
assertDoesNotThrow("d.setDate(-0)");
assertDoesNotThrow("new Date(-0, -0, -0, -0, -0, -0. -0)");
assertDoesNotThrow("new Date(0x40000000, 0x40000000, 0x40000000," +
                   "0x40000000, 0x40000000, 0x40000000, 0x40000000)")
assertDoesNotThrow("new Date(-0x40000001, -0x40000001, -0x40000001," +
                   "-0x40000001, -0x40000001, -0x40000001, -0x40000001)")


// Modified test from WebKit
// LayoutTests/fast/js/script-tests/date-utc-timeclip.js:

assertEquals(8639999999999999, Date.UTC(275760, 8, 12, 23, 59, 59, 999));
assertEquals(8640000000000000, Date.UTC(275760, 8, 13));
assertTrue(isNaN(Date.UTC(275760, 8, 13, 0, 0, 0, 1)));
assertTrue(isNaN(Date.UTC(275760, 8, 14)));

assertEquals(Date.UTC(-271821, 3, 20, 0, 0, 0, 1), -8639999999999999);
assertEquals(Date.UTC(-271821, 3, 20), -8640000000000000);
assertTrue(isNaN(Date.UTC(-271821, 3, 19, 23, 59, 59, 999)));
assertTrue(isNaN(Date.UTC(-271821, 3, 19)));


// Test creation of large date values.
d = new Date(1969, 12, 1, 99999999999);
assertTrue(isNaN(d.getTime()));
d = new Date(1969, 12, 1, -99999999999);
assertTrue(isNaN(d.getTime()));
d = new Date(1969, 12, 1, Infinity);
assertTrue(isNaN(d.getTime()));
d = new Date(1969, 12, 1, -Infinity);
assertTrue(isNaN(d.getTime()));