constructor.js - mozsearch

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var BUGNUMBER = 1185106;

var summary = "async function constructor and prototype";

print(BUGNUMBER + ": " + summary);

var f1 = async function() {};

var AsyncFunction = f1.constructor;

var AsyncFunctionPrototype = AsyncFunction.prototype;

assertEq(AsyncFunction.name, "AsyncFunction");

assertEq(AsyncFunction.length, 1);

assertEq(Object.getPrototypeOf(async function() {}), AsyncFunctionPrototype);

assertEq(AsyncFunctionPrototype.constructor, AsyncFunction);

var f2 = AsyncFunction("await 1");

assertEq(f2.constructor, AsyncFunction);

assertEq(f2.length, 0);

assertEq(Object.getPrototypeOf(f2), AsyncFunctionPrototype);

var f3 = new AsyncFunction("await 1");

assertEq(f3.constructor, AsyncFunction);

assertEq(f3.length, 0);

assertEq(Object.getPrototypeOf(f3), AsyncFunctionPrototype);

var f4 = AsyncFunction("a", "b", "c", "await 1");

assertEq(f4.constructor, AsyncFunction);

assertEq(f4.length, 3);

assertEq(Object.getPrototypeOf(f4), AsyncFunctionPrototype);

if (typeof reportCompare === "function")

    reportCompare(true, true);