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class func extends Function { }
let inst = new func("x", "return this.bar + x");
// First, ensure that we get sane prototype chains for the bound instance
let bound = inst.bind({bar: 3}, 4);
assertEq(bound instanceof func, true);
assertEq(bound(), 7);
// Check the corner case for Function.prototype.bind where the function has
// a null [[Prototype]]
Object.setPrototypeOf(inst, null);
bound = Function.prototype.bind.call(inst, {bar:1}, 3);
assertEq(Object.getPrototypeOf(bound), null);
assertEq(bound(), 4);
// Check that we actually pass the proper new.target when calling super()
function toBind() { }
var boundArgs = [];
for (let i = 0; i < 5; i++) {
boundArgs.push(i);
let bound = toBind.bind(undefined, ...boundArgs);
// We have to wire it up by hand to allow us to use a bound function
// as a superclass, but it's doable.
bound.prototype = {};
class test extends bound { };
let passedArgs = [];
for (let j = 0; j < 15; j++) {
passedArgs.push(j);
assertEq(Object.getPrototypeOf(new test(...passedArgs)), test.prototype);
}
}
if (typeof reportCompare === 'function')
reportCompare(0,0,"OK");
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