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Diffstat (limited to 'school/node_modules/has-symbols/test/tests.js')
-rw-r--r-- | school/node_modules/has-symbols/test/tests.js | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/school/node_modules/has-symbols/test/tests.js b/school/node_modules/has-symbols/test/tests.js new file mode 100644 index 0000000..89edd12 --- /dev/null +++ b/school/node_modules/has-symbols/test/tests.js @@ -0,0 +1,56 @@ +'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'); +}; |