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56 lines
1.4 KiB
56 lines
1.4 KiB
/*===
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no output expected
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===*/
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/* The underlying implementation of Date.prototype.getTimezoneOffset()
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* currently uses locale-specific datetime handling functions on UNIX.
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* Although we can't check that the implementation works correctly, we
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* can check that it doesn't fail with year values outside 32-bit UNIX
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* timestamp range (1970-2038).
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*
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* (Of course, some UNIX systems provide a 64-bit timestamp and have no
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* issues covering the Ecmascript date range.)
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*/
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function test(tv) {
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var d = new Date(tv);
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var t;
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t = d.getTimezoneOffset();
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function err(msg) {
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print('timevalue ' + tv + ': ' + msg +
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' (typeof t=' + typeof t + ', t=' + t + ')');
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}
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if (typeof t !== 'number') {
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return err('invalid return type');
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}
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if (t !== Math.floor(t)) {
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return err('offset not a whole number');
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}
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if (!(t >= -12 * 60 && t <= 12 * 60)) {
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return err('offset not within expected +/- 12h range');
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}
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}
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var years = [
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1969, 1970, 1980, 1990, 2000, 2010, 2020, 2030, 2037, 2038, 2039,
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-250000, -100000, 100000, 250000
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];
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var i;
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print('no output expected');
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try {
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test(Date.now());
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for (i = 0; i < years.length; i++) {
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// Test January and July to get any DST effects
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test(Date.UTC(years[i], 0, 1, 0, 0, 0, 0));
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test(Date.UTC(years[i], 6, 1, 0, 0, 0, 0));
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}
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} catch (e) {
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print(e.name);
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}
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