faf5e68169
BUG=v8:4163,v8:4630 LOG=y R=rossberg Review URL: https://codereview.chromium.org/1590873002 Cr-Commit-Position: refs/heads/master@{#33360}
90 lines
3.4 KiB
JavaScript
90 lines
3.4 KiB
JavaScript
// Copyright 2013 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: --allow-natives-syntax --harmony-tostring
|
|
|
|
// Test instantations of generators.
|
|
|
|
// Generators shouldn't allocate stack slots. This test will abort in debug
|
|
// mode if generators have stack slots.
|
|
function TestContextAllocation() {
|
|
function* g1(a, b, c) { yield 1; return [a, b, c]; }
|
|
function* g2() { yield 1; return arguments; }
|
|
function* g3() { yield 1; return this; }
|
|
function* g4() { var x = 10; yield 1; return x; }
|
|
// Temporary variable context allocation
|
|
function* g5(l) { "use strict"; yield 1; for (let x in l) { yield x; } }
|
|
|
|
g1();
|
|
g2();
|
|
g3();
|
|
g4();
|
|
g5(["foo"]);
|
|
}
|
|
TestContextAllocation();
|
|
|
|
|
|
// Test the properties and prototype of a generator object.
|
|
function TestGeneratorObject() {
|
|
function* g() { yield 1; }
|
|
|
|
var iter = g();
|
|
assertSame(g.prototype, Object.getPrototypeOf(iter));
|
|
assertTrue(iter instanceof g);
|
|
assertEquals("Generator", %_ClassOf(iter));
|
|
assertEquals("[object Generator]", String(iter));
|
|
assertEquals([], Object.getOwnPropertyNames(iter));
|
|
assertTrue(iter !== g());
|
|
assertEquals("[object Generator]", Object.prototype.toString.call(iter));
|
|
var gf = iter.__proto__.constructor;
|
|
assertEquals("[object GeneratorFunction]", Object.prototype.toString.call(gf));
|
|
|
|
// generators are not constructable.
|
|
assertThrows(()=>new g());
|
|
}
|
|
TestGeneratorObject();
|
|
|
|
|
|
// Test the methods of generator objects.
|
|
function TestGeneratorObjectMethods() {
|
|
function* g() { yield 1; }
|
|
var iter = g();
|
|
|
|
function TestNonGenerator(non_generator) {
|
|
assertThrows(function() { iter.next.call(non_generator); }, TypeError);
|
|
assertThrows(function() { iter.next.call(non_generator, 1); }, TypeError);
|
|
assertThrows(function() { iter.throw.call(non_generator, 1); }, TypeError);
|
|
}
|
|
|
|
TestNonGenerator(1);
|
|
TestNonGenerator({});
|
|
TestNonGenerator(function(){});
|
|
TestNonGenerator(g);
|
|
TestNonGenerator(g.prototype);
|
|
}
|
|
TestGeneratorObjectMethods();
|