test262/implementation-contributed/javascriptcore/es6/well-known_symbols_Symbol.hasInstance.js
test262-automation e9a5a7f918 [javascriptcore-test262-automation] changes from git@github.com:WebKit/webkit.git at sha 949e26452cfa153a7f4afe593da97e2fe9e1b706 on Tue Jul 03 2018 14:35:15 GMT-0400 (Eastern Daylight Time) (#1620)
* [javascriptcore-test262-automation] changes from git@github.com:WebKit/webkit.git at sha 949e26452cfa153a7f4afe593da97e2fe9e1b706 on Tue Jul 03 2018 14:35:15 GMT-0400 (Eastern Daylight Time)
2018-07-03 15:59:58 -04:00

17 lines
291 B
JavaScript

function test() {
var passed = false;
var obj = { foo: true };
var C = function(){};
Object.defineProperty(C, Symbol.hasInstance, {
value: function(inst) { passed = inst.foo; return false; }
});
obj instanceof C;
return passed;
}
if (!test())
throw new Error("Test failed");