test262/test/built-ins/GeneratorFunction/has-instance.js

35 lines
1.1 KiB
JavaScript

// Copyright (C) 2013 the V8 project authors. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
es6id: 25.2
description: >
Generator function instances are correctly reported as instances of the
GeneratorFunction intrinsic.
features: [generators]
---*/
var GeneratorFunction = Object.getPrototypeOf(function*() {}).constructor;
function* gDecl() {}
var gExpr = function*() {};
assert(
gDecl instanceof GeneratorFunction,
'Generators created via GeneratorDeclaration syntax are proper instances of GeneratorFunction'
);
assert(
gExpr instanceof GeneratorFunction,
'Generators created via GeneratorExpression syntax are proper instances of GeneratorFunction'
);
assert(
new GeneratorFunction() instanceof GeneratorFunction,
'Generators created via constructor invocation of GeneratorFunction are proper instances of GeneratorFunction'
);
assert(
GeneratorFunction() instanceof GeneratorFunction,
'Generators created via function invocation of GeneratorFunction are proper instances of GeneratorFunction'
);