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// Copyright 2016 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Flags: --harmony-instanceof
// Make sure it's an error if @@hasInstance isn't a function.
(function() {
var F = {};
F[Symbol.hasInstance] = null;
assertThrows(function() { 0 instanceof F; }, TypeError);
})();
// Make sure the result is coerced to boolean.
(function() {
var F = {};
F[Symbol.hasInstance] = function() { return undefined; };
assertEquals(0 instanceof F, false);
F[Symbol.hasInstance] = function() { return null; };
assertEquals(0 instanceof F, false);
F[Symbol.hasInstance] = function() { return true; };
assertEquals(0 instanceof F, true);
})();
// Make sure if @@hasInstance throws, we catch it.
(function() {
var F = {};
F[Symbol.hasInstance] = function() { throw new Error("always throws"); }
try {
0 instanceof F;
} catch (e) {
assertEquals(e.message, "always throws");
}
})();
// @@hasInstance works for bound functions.
(function() {
var BC = function() {};
var bc = new BC();
var bound = BC.bind();
assertEquals(bound[Symbol.hasInstance](bc), true);
assertEquals(bound[Symbol.hasInstance]([]), false);
})();
// if OrdinaryHasInstance is passed a non-callable receiver, return false.
assertEquals(Function.prototype[Symbol.hasInstance].call(Array, []), true);
assertEquals(Function.prototype[Symbol.hasInstance].call({}, {}), false);
// OrdinaryHasInstance passed a non-object argument returns false.
assertEquals(Function.prototype[Symbol.hasInstance].call(Array, 0), false);
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