v8/test/mjsunit/harmony/block-leave.js
rossberg@chromium.org 1abf3ed0a4 Introduce collective --harmony flag.
Shorten --harmony-block-scoping to --harmony-scoping.

R=keuchel@chromium.org
BUG=
TEST=

Review URL: http://codereview.chromium.org/8226017

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9589 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2011-10-12 12:23:06 +00:00

226 lines
4.6 KiB
JavaScript

// 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-scoping
// We want to test the context chain shape. In each of the tests cases
// below, the outer with is to force a runtime lookup of the identifier 'x'
// to actually verify that the inner context has been discarded. A static
// lookup of 'x' might accidentally succeed.
{
let x = 2;
L: {
let x = 3;
assertEquals(3, x);
break L;
assertTrue(false);
}
assertEquals(2, x);
}
do {
let x = 4;
assertEquals(4,x);
{
let x = 5;
assertEquals(5, x);
continue;
assertTrue(false);
}
} while (false);
var caught = false;
try {
{
let xx = 18;
throw 25;
assertTrue(false);
}
} catch (e) {
caught = true;
assertEquals(25, e);
with ({y:19}) {
assertEquals(19, y);
try {
// NOTE: This checks that the block scope containing xx has been
// removed from the context chain.
xx;
assertTrue(false); // should not reach here
} catch (e2) {
assertTrue(e2 instanceof ReferenceError);
}
}
}
assertTrue(caught);
with ({x: 'outer'}) {
label: {
let x = 'inner';
break label;
}
assertEquals('outer', x);
}
with ({x: 'outer'}) {
label: {
let x = 'middle';
{
let x = 'inner';
break label;
}
}
assertEquals('outer', x);
}
with ({x: 'outer'}) {
for (var i = 0; i < 10; ++i) {
let x = 'inner' + i;
continue;
}
assertEquals('outer', x);
}
with ({x: 'outer'}) {
label: for (var i = 0; i < 10; ++i) {
let x = 'middle' + i;
for (var j = 0; j < 10; ++j) {
let x = 'inner' + j;
continue label;
}
}
assertEquals('outer', x);
}
with ({x: 'outer'}) {
try {
let x = 'inner';
throw 0;
} catch (e) {
assertEquals('outer', x);
}
}
with ({x: 'outer'}) {
try {
let x = 'middle';
{
let x = 'inner';
throw 0;
}
} catch (e) {
assertEquals('outer', x);
}
}
try {
with ({x: 'outer'}) {
try {
let x = 'inner';
throw 0;
} finally {
assertEquals('outer', x);
}
}
} catch (e) {
if (e instanceof MjsUnitAssertionError) throw e;
}
try {
with ({x: 'outer'}) {
try {
let x = 'middle';
{
let x = 'inner';
throw 0;
}
} finally {
assertEquals('outer', x);
}
}
} catch (e) {
if (e instanceof MjsUnitAssertionError) throw e;
}
// Verify that the context is correctly set in the stack frame after exiting
// from with.
function f() {}
with ({x: 'outer'}) {
label: {
let x = 'inner';
break label;
}
f(); // The context could be restored from the stack after the call.
assertEquals('outer', x);
}
with ({x: 'outer'}) {
for (var i = 0; i < 10; ++i) {
let x = 'inner';
continue;
}
f();
assertEquals('outer', x);
}
with ({x: 'outer'}) {
try {
let x = 'inner';
throw 0;
} catch (e) {
f();
assertEquals('outer', x);
}
}
try {
with ({x: 'outer'}) {
try {
let x = 'inner';
throw 0;
} finally {
f();
assertEquals('outer', x);
}
}
} catch (e) {
if (e instanceof MjsUnitAssertionError) throw e;
}