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95 lines
3.0 KiB
JavaScript
95 lines
3.0 KiB
JavaScript
// Copyright 2015 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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var target = {
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"target_one": 1
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};
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target.__proto__ = {
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"target_proto_two": 2
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};
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var handler = {
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ownKeys: function(target) {
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return ["foo", "bar"];
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}
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}
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var proxy = new Proxy(target, handler);
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// Simple case.
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assertEquals(["foo", "bar"], Reflect.ownKeys(proxy));
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// Test interesting steps of the algorithm:
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// Step 6: Fall through to target.[[OwnPropertyKeys]] if the trap is undefined.
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handler.ownKeys = undefined;
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assertEquals(["target_one"], Reflect.ownKeys(proxy));
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// Step 7: Throwing traps don't crash.
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handler.ownKeys = function(target) { throw 1; };
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assertThrows("Reflect.ownKeys(proxy)");
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// Step 8: CreateListFromArrayLike error cases:
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// Returning a non-Object throws.
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var keys = 1;
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handler.ownKeys = function(target) { return keys; };
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assertThrows("Reflect.ownKeys(proxy)", TypeError);
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keys = "string";
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assertThrows("Reflect.ownKeys(proxy)", TypeError);
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keys = Symbol("foo");
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assertThrows("Reflect.ownKeys(proxy)", TypeError);
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keys = null;
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assertThrows("Reflect.ownKeys(proxy)", TypeError);
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// "length" property is honored.
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keys = { 0: "a", 1: "b", 2: "c" };
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keys.length = 0;
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assertEquals([], Reflect.ownKeys(proxy));
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keys.length = 1;
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assertEquals(["a"], Reflect.ownKeys(proxy));
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keys.length = 3;
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assertEquals(["a", "b", "c"], Reflect.ownKeys(proxy));
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// The spec wants to allow lengths up to 2^53, but we can't allocate arrays
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// of that size, so we throw even for smaller values.
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keys.length = Math.pow(2, 33);
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assertThrows("Reflect.ownKeys(proxy)", RangeError);
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// Check that we don't allow duplicated keys.
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keys = ['a', 'a', 'a']
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assertThrows("Reflect.ownKeys(proxy)", TypeError);
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// Non-Name results throw.
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keys = [1];
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assertThrows("Reflect.ownKeys(proxy)", TypeError);
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keys = [{}];
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assertThrows("Reflect.ownKeys(proxy)", TypeError);
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keys = [{toString: function() { return "foo"; }}];
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assertThrows("Reflect.ownKeys(proxy)", TypeError);
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keys = [null];
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assertThrows("Reflect.ownKeys(proxy)", TypeError);
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// Step 17a: The trap result must include all non-configurable keys.
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Object.defineProperty(target, "nonconf", {value: 1, configurable: false});
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keys = ["foo"];
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assertThrows("Reflect.ownKeys(proxy)", TypeError);
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keys = ["nonconf"];
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assertEquals(keys, Reflect.ownKeys(proxy));
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// Check that we don't allow duplicated keys.
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keys = ['nonconf', 'nonconf', 'nonconf']
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assertThrows("Reflect.ownKeys(proxy)", TypeError);
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// Step 19a: The trap result must all keys of a non-extensible target.
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Object.preventExtensions(target);
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assertThrows("Reflect.ownKeys(proxy)", TypeError);
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keys = ["nonconf", "target_one"];
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assertEquals(keys, Reflect.ownKeys(proxy));
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// Step 20: The trap result must not add keys to a non-extensible target.
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keys = ["nonconf", "target_one", "fantasy"];
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assertThrows("Reflect.ownKeys(proxy)", TypeError);
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// Check that we don't allow duplicated keys.
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keys = ['nonconf', 'target_one', 'nonconf', 'nonconf', 'target_one',]
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assertThrows("Reflect.ownKeys(proxy)", TypeError);
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