index.js 1.2 KB

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  1. 'use strict';
  2. var test = require('tape');
  3. var isDate = require('../');
  4. var hasToStringTag = require('has-tostringtag/shams')();
  5. test('not Dates', function (t) {
  6. // @ts-expect-error
  7. t.notOk(isDate(), 'undefined is not Date');
  8. t.notOk(isDate(null), 'null is not Date');
  9. t.notOk(isDate(false), 'false is not Date');
  10. t.notOk(isDate(true), 'true is not Date');
  11. t.notOk(isDate(42), 'number is not Date');
  12. t.notOk(isDate('foo'), 'string is not Date');
  13. t.notOk(isDate([]), 'array is not Date');
  14. t.notOk(isDate({}), 'object is not Date');
  15. t.notOk(isDate(function () {}), 'function is not Date');
  16. t.notOk(isDate(/a/g), 'regex literal is not Date');
  17. t.notOk(isDate(new RegExp('a', 'g')), 'regex object is not Date');
  18. t.end();
  19. });
  20. test('@@toStringTag', { skip: !hasToStringTag }, function (t) {
  21. var realDate = new Date();
  22. /** @type {{ toString(): unknown; valueOf(): unknown; [Symbol.toStringTag]?: string; }} */
  23. var fakeDate = {
  24. toString: function () { return String(realDate); },
  25. valueOf: function () { return realDate.getTime(); }
  26. };
  27. fakeDate[Symbol.toStringTag] = 'Date';
  28. t.notOk(isDate(fakeDate), 'fake Date with @@toStringTag "Date" is not Date');
  29. t.end();
  30. });
  31. test('Dates', function (t) {
  32. t.ok(isDate(new Date()), 'new Date() is Date');
  33. t.end();
  34. });