v8/test/mjsunit/harmony/proxies-for.js

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// Copyright 2011 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// Flags: --harmony-proxies
// Helper.
function TestWithProxies(test, x, y, z) {
test(Proxy.create, x, y, z)
test(function(h) {return Proxy.createFunction(h, function() {})}, x, y, z)
}
// Iterate over a proxy.
function TestForIn(properties, handler) {
TestWithProxies(TestForIn2, properties, handler)
}
function TestForIn2(create, properties, handler) {
var p = create(handler)
var found = []
for (var x in p) found.push(x)
assertArrayEquals(properties, found)
}
TestForIn(["0", "a"], {
enumerate: function() { return [0, "a"] }
})
TestForIn(["null", "a"], {
enumerate: function() { return this.enumerate2() },
enumerate2: function() { return [null, "a"] }
})
TestForIn(["b", "d"], {
getPropertyNames: function() { return ["a", "b", "c", "d", "e"] },
getPropertyDescriptor: function(k) {
switch (k) {
case "a": return {enumerable: false, value: "3", configurable: true};
case "b": return {enumerable: true, get get() {}, configurable: true};
case "c": return {value: 4, configurable: true};
case "d": return {get enumerable() { return true }, configurable: true};
default: return undefined;
}
}
})
TestForIn(["b", "a", "0", "c"], Proxy.create({
get: function(pr, pk) {
return function() { return ["b", "a", 0, "c"] }
}
}))
// Iterate over an object with a proxy prototype.
function TestForInDerived(properties, handler) {
TestWithProxies(TestForInDerived2, properties, handler)
}
function TestForInDerived2(create, properties, handler) {
var p = create(handler)
var o = Object.create(p)
o.z = 0
var found = []
for (var x in o) found.push(x)
assertArrayEquals(["z"].concat(properties), found)
var oo = Object.create(o)
oo.y = 0
var found = []
for (var x in oo) found.push(x)
assertArrayEquals(["y", "z"].concat(properties), found)
}
TestForInDerived(["0", "a"], {
enumerate: function() { return [0, "a"] },
getPropertyDescriptor: function(k) {
return k == "0" || k == "a" ? {configurable: true} : undefined
}
})
TestForInDerived(["null", "a"], {
enumerate: function() { return this.enumerate2() },
enumerate2: function() { return [null, "a"] },
getPropertyDescriptor: function(k) {
return k == "null" || k == "a" ? {configurable: true} : undefined
}
})
TestForInDerived(["b", "d"], {
getPropertyNames: function() { return ["a", "b", "c", "d", "e"] },
getPropertyDescriptor: function(k) {
switch (k) {
case "a": return {enumerable: false, value: "3", configurable: true};
case "b": return {enumerable: true, get get() {}, configurable: true};
case "c": return {value: 4, configurable: true};
case "d": return {get enumerable() { return true }, configurable: true};
default: return undefined;
}
}
})
// Throw exception in enumerate trap.
function TestForInThrow(handler) {
TestWithProxies(TestForInThrow2, handler)
}
function TestForInThrow2(create, handler) {
var p = create(handler)
var o = Object.create(p)
assertThrows(function(){ for (var x in p) {} }, "myexn")
assertThrows(function(){ for (var x in o) {} }, "myexn")
}
TestForInThrow({
enumerate: function() { throw "myexn" }
})
TestForInThrow({
enumerate: function() { return this.enumerate2() },
enumerate2: function() { throw "myexn" }
})
TestForInThrow({
getPropertyNames: function() { throw "myexn" }
})
TestForInThrow({
getPropertyNames: function() { return ["a"] },
getPropertyDescriptor: function() { throw "myexn" }
})
TestForInThrow(Proxy.create({
get: function(pr, pk) {
return function() { throw "myexn" }
}
}))