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  1. 'use strict';
  2. var test = require('tape');
  3. var defineProperties = require('define-properties');
  4. var callBind = require('call-bind');
  5. var isEnumerable = Object.prototype.propertyIsEnumerable;
  6. var functionsHaveNames = require('functions-have-names')();
  7. var functionsHaveConfigurableNames = require('functions-have-names').functionsHaveConfigurableNames();
  8. var hasStrictMode = require('has-strict-mode')();
  9. var runTests = require('./tests');
  10. test('builtin', function (t) {
  11. var descriptor = Object.getOwnPropertyDescriptor(RegExp.prototype, 'flags');
  12. t.equal(descriptor.get.length, 0, 'RegExp#flags getter has a length of 0');
  13. t.test('Function name', { skip: !functionsHaveNames }, function (st) {
  14. st.equal(descriptor.get.name, functionsHaveConfigurableNames ? 'get flags' : 'flags', 'RegExp#flags getter has name "get flags" (or "flags" if function names are not configurable)');
  15. st.end();
  16. });
  17. t.test('enumerability', { skip: !defineProperties.supportsDescriptors }, function (et) {
  18. et.equal(false, isEnumerable.call(RegExp.prototype, 'flags'), 'RegExp#flags is not enumerable');
  19. et.end();
  20. });
  21. t.test('bad array/this value', { skip: !hasStrictMode }, function (st) {
  22. st['throws'](function () { return descriptor.get.call(undefined); }, TypeError, 'undefined is not an object');
  23. st['throws'](function () { return descriptor.get.call(null); }, TypeError, 'null is not an object');
  24. st.end();
  25. });
  26. t.test('has the correct descriptor', function (st) {
  27. st.equal(descriptor.configurable, true);
  28. st.equal(descriptor.enumerable, false);
  29. st.equal(typeof descriptor.get, 'function');
  30. st.equal(descriptor.set, undefined);
  31. st.end();
  32. });
  33. runTests(callBind(descriptor.get), t);
  34. t.end();
  35. });