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for (var constructor of anyTypedArrayConstructors) {
assertEq(constructor.prototype.at.length, 1);
assertEq(new constructor([0]).at(0), 0);
assertEq(new constructor([0]).at(-1), 0);
assertEq(new constructor([]).at(0), undefined);
assertEq(new constructor([]).at(-1), undefined);
assertEq(new constructor([]).at(1), undefined);
assertEq(new constructor([0, 1]).at(0), 0);
assertEq(new constructor([0, 1]).at(1), 1);
assertEq(new constructor([0, 1]).at(-2), 0);
assertEq(new constructor([0, 1]).at(-1), 1);
assertEq(new constructor([0, 1]).at(2), undefined);
assertEq(new constructor([0, 1]).at(-3), undefined);
assertEq(new constructor([0, 1]).at(-4), undefined);
assertEq(new constructor([0, 1]).at(Infinity), undefined);
assertEq(new constructor([0, 1]).at(-Infinity), undefined);
assertEq(new constructor([0, 1]).at(NaN), 0); // ToInteger(NaN) = 0
// Called from other globals.
if (typeof newGlobal === "function") {
var at = newGlobal()[constructor.name].prototype.at;
assertEq(at.call(new constructor([1, 2, 3]), 2), 3);
}
// Throws if `this` isn't a TypedArray.
var invalidReceivers = [undefined, null, 1, false, "", Symbol(), [], {}, /./,
new Proxy(new constructor(), {})];
invalidReceivers.forEach(invalidReceiver => {
assertThrowsInstanceOf(() => {
constructor.prototype.at.call(invalidReceiver);
}, TypeError, "Assert that 'at' fails if this value is not a TypedArray");
});
// Test that the length getter is never called.
assertEq(Object.defineProperty(new constructor([1, 2, 3]), "length", {
get() {
throw new Error("length accessor called");
}
}).at(1), 2);
}
if (typeof reportCompare === "function")
reportCompare(true, true);