You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
57 lines
2.0 KiB
57 lines
2.0 KiB
'use strict';
|
|
|
|
// eslint-disable-next-line consistent-return
|
|
module.exports = function runSymbolTests(t) {
|
|
t.equal(typeof Symbol, 'function', 'global Symbol is a function');
|
|
|
|
if (typeof Symbol !== 'function') { return false; }
|
|
|
|
t.notEqual(Symbol(), Symbol(), 'two symbols are not equal');
|
|
|
|
/*
|
|
t.equal(
|
|
Symbol.prototype.toString.call(Symbol('foo')),
|
|
Symbol.prototype.toString.call(Symbol('foo')),
|
|
'two symbols with the same description stringify the same'
|
|
);
|
|
*/
|
|
|
|
/*
|
|
var foo = Symbol('foo');
|
|
|
|
t.notEqual(
|
|
String(foo),
|
|
String(Symbol('bar')),
|
|
'two symbols with different descriptions do not stringify the same'
|
|
);
|
|
*/
|
|
|
|
t.equal(typeof Symbol.prototype.toString, 'function', 'Symbol#toString is a function');
|
|
// t.equal(String(foo), Symbol.prototype.toString.call(foo), 'Symbol#toString equals String of the same symbol');
|
|
|
|
t.equal(typeof Object.getOwnPropertySymbols, 'function', 'Object.getOwnPropertySymbols is a function');
|
|
|
|
var obj = {};
|
|
var sym = Symbol('test');
|
|
var symObj = Object(sym);
|
|
t.notEqual(typeof sym, 'string', 'Symbol is not a string');
|
|
t.equal(Object.prototype.toString.call(sym), '[object Symbol]', 'symbol primitive Object#toStrings properly');
|
|
t.equal(Object.prototype.toString.call(symObj), '[object Symbol]', 'symbol primitive Object#toStrings properly');
|
|
|
|
var symVal = 42;
|
|
obj[sym] = symVal;
|
|
// eslint-disable-next-line no-restricted-syntax
|
|
for (sym in obj) { t.fail('symbol property key was found in for..in of object'); }
|
|
|
|
t.deepEqual(Object.keys(obj), [], 'no enumerable own keys on symbol-valued object');
|
|
t.deepEqual(Object.getOwnPropertyNames(obj), [], 'no own names on symbol-valued object');
|
|
t.deepEqual(Object.getOwnPropertySymbols(obj), [sym], 'one own symbol on symbol-valued object');
|
|
t.equal(Object.prototype.propertyIsEnumerable.call(obj, sym), true, 'symbol is enumerable');
|
|
t.deepEqual(Object.getOwnPropertyDescriptor(obj, sym), {
|
|
configurable: true,
|
|
enumerable: true,
|
|
value: 42,
|
|
writable: true
|
|
}, 'property descriptor is correct');
|
|
};
|