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Improve Date.parse

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- rewrite Date.parse() with separate parsers
- return `NaN` for out of bounds field values as specified
- accept up to 9 decimals for millisecond fraction but truncate at 3
- accept many more alternative date/time formats
- add test cases in tests/test_builtin.js
This commit is contained in:
Charlie Gordon
2024-02-25 23:47:26 +01:00
parent 6428ce0c8b
commit 78db49cf95
2 changed files with 367 additions and 249 deletions
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73
tests/test_builtin.js
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@@ -540,28 +540,65 @@ function test_date()
// is not a valid instance of this format.
// Hence the fractional part after . should have 3 digits and how
// a different number of digits is handled is implementation defined.
var d = new Date(1506098258091), a, s;
assert(Date.parse(""), NaN);
assert(Date.parse("2000"), 946684800000);
assert(Date.parse("2000-01"), 946684800000);
assert(Date.parse("2000-01-01"), 946684800000);
//assert(Date.parse("2000-01-01T"), NaN);
//assert(Date.parse("2000-01-01T00Z"), NaN);
assert(Date.parse("2000-01-01T00:00Z"), 946684800000);
assert(Date.parse("2000-01-01T00:00:00Z"), 946684800000);
assert(Date.parse("2000-01-01T00:00:00.1Z"), 946684800100);
assert(Date.parse("2000-01-01T00:00:00.10Z"), 946684800100);
assert(Date.parse("2000-01-01T00:00:00.100Z"), 946684800100);
assert(Date.parse("2000-01-01T00:00:00.1000Z"), 946684800100);
assert(Date.parse("2000-01-01T00:00:00+00:00"), 946684800000);
//assert(Date.parse("2000-01-01T00:00:00+00:30"), 946686600000);
var d = new Date("2000T00:00"); // Jan 1st 2000, 0:00:00 local time
assert(typeof d === 'object' && d.toString() != 'Invalid Date');
assert((new Date('Jan 1 2000')).toISOString(),
d.toISOString());
assert((new Date('Jan 1 2000 00:00')).toISOString(),
d.toISOString());
assert((new Date('Jan 1 2000 00:00:00')).toISOString(),
d.toISOString());
assert((new Date('Jan 1 2000 00:00:00 GMT+0100')).toISOString(),
'1999-12-31T23:00:00.000Z');
assert((new Date('Jan 1 2000 00:00:00 GMT+0200')).toISOString(),
'1999-12-31T22:00:00.000Z');
assert((new Date('Sat Jan 1 2000')).toISOString(),
d.toISOString());
assert((new Date('Sat Jan 1 2000 00:00')).toISOString(),
d.toISOString());
assert((new Date('Sat Jan 1 2000 00:00:00')).toISOString(),
d.toISOString());
assert((new Date('Sat Jan 1 2000 00:00:00 GMT+0100')).toISOString(),
'1999-12-31T23:00:00.000Z');
assert((new Date('Sat Jan 1 2000 00:00:00 GMT+0200')).toISOString(),
'1999-12-31T22:00:00.000Z');
var d = new Date(1506098258091);
assert(d.toISOString(), "2017-09-22T16:37:38.091Z");
d.setUTCHours(18, 10, 11);
assert(d.toISOString(), "2017-09-22T18:10:11.091Z");
a = Date.parse(d.toISOString());
var a = Date.parse(d.toISOString());
assert((new Date(a)).toISOString(), d.toISOString());
s = new Date("2020-01-01T01:01:01.1Z").toISOString();
assert(s, "2020-01-01T01:01:01.100Z");
s = new Date("2020-01-01T01:01:01.12Z").toISOString();
assert(s, "2020-01-01T01:01:01.120Z");
s = new Date("2020-01-01T01:01:01.123Z").toISOString();
assert(s, "2020-01-01T01:01:01.123Z");
s = new Date("2020-01-01T01:01:01.1234Z").toISOString();
assert(s, "2020-01-01T01:01:01.123Z");
s = new Date("2020-01-01T01:01:01.12345Z").toISOString();
assert(s, "2020-01-01T01:01:01.123Z");
s = new Date("2020-01-01T01:01:01.1235Z").toISOString();
assert(s == "2020-01-01T01:01:01.124Z" || // QuickJS
s == "2020-01-01T01:01:01.123Z"); // nodeJS
s = new Date("2020-01-01T01:01:01.9999Z").toISOString();
assert(s == "2020-01-01T01:01:02.000Z" || // QuickJS
s == "2020-01-01T01:01:01.999Z"); // nodeJS
assert((new Date("2020-01-01T01:01:01.123Z")).toISOString(),
"2020-01-01T01:01:01.123Z");
/* implementation defined behavior */
assert((new Date("2020-01-01T01:01:01.1Z")).toISOString(),
"2020-01-01T01:01:01.100Z");
assert((new Date("2020-01-01T01:01:01.12Z")).toISOString(),
"2020-01-01T01:01:01.120Z");
assert((new Date("2020-01-01T01:01:01.1234Z")).toISOString(),
"2020-01-01T01:01:01.123Z");
assert((new Date("2020-01-01T01:01:01.12345Z")).toISOString(),
"2020-01-01T01:01:01.123Z");
assert((new Date("2020-01-01T01:01:01.1235Z")).toISOString(),
"2020-01-01T01:01:01.123Z");
assert((new Date("2020-01-01T01:01:01.9999Z")).toISOString(),
"2020-01-01T01:01:01.999Z");
assert(Date.UTC(NaN), NaN);
assert(Date.UTC(2017, NaN), NaN);