78 lines
3.0 KiB
JavaScript
78 lines
3.0 KiB
JavaScript
|
describe('JSON', function () {
|
||
|
|
var functionsHaveNames = (function foo() {}).name === 'foo';
|
||
|
|
var ifFunctionsHaveNamesIt = functionsHaveNames ? it : xit;
|
||
|
|
var hasSymbols = typeof Symbol === 'function' && typeof Symbol() === 'symbol';
|
||
|
|
var ifSymbolsIt = hasSymbols ? it : xit;
|
||
|
|
var ifSymbolsDescribe = hasSymbols ? describe : xit;
|
||
|
|
|
||
|
|
describe('.stringify()', function () {
|
||
|
|
ifFunctionsHaveNamesIt('has the right name', function () {
|
||
|
|
expect(JSON.stringify.name).to.equal('stringify');
|
||
|
|
});
|
||
|
|
|
||
|
|
ifSymbolsIt('serializes a Symbol to undefined', function () {
|
||
|
|
expect(JSON.stringify(Symbol())).to.equal(undefined);
|
||
|
|
});
|
||
|
|
|
||
|
|
ifSymbolsIt('serializes a Symbol object to {}', function () {
|
||
|
|
expect(function stringifyObjectSymbol() { JSON.stringify(Object(Symbol())); }).not.to['throw']();
|
||
|
|
expect(JSON.stringify(Object(Symbol()))).to.equal('{}');
|
||
|
|
});
|
||
|
|
|
||
|
|
ifSymbolsIt('serializes Symbols in an Array to null', function () {
|
||
|
|
expect(JSON.stringify([Symbol('foo')])).to.equal('[null]');
|
||
|
|
});
|
||
|
|
|
||
|
|
ifSymbolsIt('serializes Symbol objects in an Array to {}', function () {
|
||
|
|
expect(function stringifyObjectSymbolInArray() { JSON.stringify([Object(Symbol('foo'))]); }).not.to['throw']();
|
||
|
|
expect(JSON.stringify([Object(Symbol('foo'))])).to.equal('[{}]');
|
||
|
|
});
|
||
|
|
|
||
|
|
ifSymbolsDescribe('skips symbol properties and values in an object', function () {
|
||
|
|
var enumSym = Symbol('enumerable');
|
||
|
|
var nonenum = Symbol('non-enumerable');
|
||
|
|
var createObject = function () {
|
||
|
|
var obj = { a: 1 };
|
||
|
|
obj[enumSym] = true;
|
||
|
|
obj.sym = enumSym;
|
||
|
|
Object.defineProperty(obj, nonenum, { enumerable: false, value: true });
|
||
|
|
expect(Object.getOwnPropertySymbols(obj)).to.eql([enumSym, nonenum]);
|
||
|
|
return obj;
|
||
|
|
};
|
||
|
|
|
||
|
|
it('works with no replacer', function () {
|
||
|
|
var obj = createObject();
|
||
|
|
expect(JSON.stringify(obj)).to.equal('{"a":1}');
|
||
|
|
expect(JSON.stringify(obj, null, '|')).to.equal('{\n|"a": 1\n}');
|
||
|
|
});
|
||
|
|
|
||
|
|
it('works with a replacer function', function () {
|
||
|
|
var tuples = [];
|
||
|
|
var replacer = function (key, value) {
|
||
|
|
tuples.push([this, key, value]);
|
||
|
|
return value;
|
||
|
|
};
|
||
|
|
var obj = createObject();
|
||
|
|
expect(JSON.stringify(obj, replacer, '|')).to.equal('{\n|"a": 1\n}'); // populate `tuples` array
|
||
|
|
expect(tuples).to.eql([
|
||
|
|
[{ '': obj }, '', obj],
|
||
|
|
[obj, 'a', 1],
|
||
|
|
[obj, 'sym', enumSym]
|
||
|
|
]);
|
||
|
|
});
|
||
|
|
|
||
|
|
it('works with a replacer array', function () {
|
||
|
|
var obj = createObject();
|
||
|
|
obj.foo = 'bar';
|
||
|
|
obj[Symbol.prototype.toString.call(enumSym)] = 'tricksy';
|
||
|
|
expect(JSON.stringify(obj, ['a', enumSym])).to.equal('{"a":1}');
|
||
|
|
expect(JSON.stringify(obj, ['a', enumSym], '|')).to.equal('{\n|"a": 1\n}');
|
||
|
|
});
|
||
|
|
|
||
|
|
it('ignores a non-array non-callable replacer object', function () {
|
||
|
|
expect(JSON.stringify('z', { test: null })).to.equal('"z"');
|
||
|
|
});
|
||
|
|
});
|
||
|
|
});
|
||
|
|
});
|