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Diffstat (limited to '')
-rw-r--r-- | js/src/tests/non262/Intl/DateTimeFormat/formatRange-gregorian-proleptic.js | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/js/src/tests/non262/Intl/DateTimeFormat/formatRange-gregorian-proleptic.js b/js/src/tests/non262/Intl/DateTimeFormat/formatRange-gregorian-proleptic.js new file mode 100644 index 0000000000..9356577b47 --- /dev/null +++ b/js/src/tests/non262/Intl/DateTimeFormat/formatRange-gregorian-proleptic.js @@ -0,0 +1,28 @@ +// |reftest| skip-if(!this.hasOwnProperty("Intl")) + +// Ensure formatRange() uses a proleptic Gregorian calendar. +// ICU bug: https://unicode-org.atlassian.net/browse/ICU-20705 + +let dtf = new Intl.DateTimeFormat("en", {timeZone: "UTC"}); + +// The Gregorian calendar was first introduced in 15 October 1582. +const firstGregorian = new Date("1582-10-15"); +assertEq(dtf.formatRange(firstGregorian, firstGregorian), dtf.format(firstGregorian)); + +// To deal with the ten days' difference between the Julian and the Gregorian calendar, some days +// were skipped, so that 4 October 1582 was followed by 15 October 1582. +const lastJulian = new Date("1582-10-04"); +assertEq(dtf.formatRange(lastJulian, lastJulian), dtf.format(lastJulian)); + +function rangePart(source, parts) { + return parts.filter(x => x.source === source).map(x => x.value).join(""); +} + +// Test with non-empty range. +assertEq(rangePart("startRange", dtf.formatRangeToParts(lastJulian, firstGregorian)), + dtf.format(lastJulian)); +assertEq(rangePart("endRange", dtf.formatRangeToParts(lastJulian, firstGregorian)), + dtf.format(firstGregorian)); + +if (typeof reportCompare === "function") + reportCompare(0, 0); |