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node_modules/object.getownpropertydescriptors/test/shimmed.js 1.35 KB
ce4c83ff   wxy   初始提交
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  'use strict';
  
  var getDescriptors = require('../');
  getDescriptors.shim();
  
  var test = require('tape');
  var defineProperties = require('define-properties');
  var runTests = require('./tests');
  var isEnumerable = Object.prototype.propertyIsEnumerable;
  var functionsHaveNames = function f() {}.name === 'f';
  
  test('shimmed', function (t) {
  	t.equal(Object.getOwnPropertyDescriptors.length, 1, 'Object.getOwnPropertyDescriptors has a length of 1');
  	t.test('Function name', { skip: !functionsHaveNames }, function (st) {
  		st.equal(Object.getOwnPropertyDescriptors.name, 'getOwnPropertyDescriptors', 'Object.getOwnPropertyDescriptors has name "getOwnPropertyDescriptors"');
  		st.end();
  	});
  
  	t.test('enumerability', { skip: !defineProperties.supportsDescriptors }, function (et) {
  		et.equal(false, isEnumerable.call(Object, 'getOwnPropertyDescriptors'), 'Object.getOwnPropertyDescriptors is not enumerable');
  		et.end();
  	});
  
  	var supportsStrictMode = (function () { return typeof this === 'undefined'; }());
  
  	t.test('bad object/this value', { skip: !supportsStrictMode }, function (st) {
  		st.throws(function () { return getDescriptors(undefined, 'a'); }, TypeError, 'undefined is not an object');
  		st.throws(function () { return getDescriptors(null, 'a'); }, TypeError, 'null is not an object');
  		st.end();
  	});
  
  	runTests(Object.getOwnPropertyDescriptors, t);
  
  	t.end();
  });