block-let-declaration.js revision 589d6979ff2ef66fca2d8fa51404c369ca5e9250
1// Copyright 2011 the V8 project authors. All rights reserved. 2// Redistribution and use in source and binary forms, with or without 3// modification, are permitted provided that the following conditions are 4// met: 5// 6// * Redistributions of source code must retain the above copyright 7// notice, this list of conditions and the following disclaimer. 8// * Redistributions in binary form must reproduce the above 9// copyright notice, this list of conditions and the following 10// disclaimer in the documentation and/or other materials provided 11// with the distribution. 12// * Neither the name of Google Inc. nor the names of its 13// contributors may be used to endorse or promote products derived 14// from this software without specific prior written permission. 15// 16// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 28// Flags: --harmony-block-scoping 29 30// Test let declarations in various settings. 31 32// Global 33let x; 34let y = 2; 35 36// Block local 37{ 38 let y; 39 let x = 3; 40} 41 42assertEquals(undefined, x); 43assertEquals(2,y); 44 45if (true) { 46 let y; 47 assertEquals(undefined, y); 48} 49 50function TestLocalThrows(str, expect) { 51 assertThrows("(function(){" + str + "})()", expect); 52} 53 54function TestLocalDoesNotThrow(str) { 55 assertDoesNotThrow("(function(){" + str + "})()"); 56} 57 58// Unprotected statement 59TestLocalThrows("if (true) let x;", SyntaxError); 60TestLocalThrows("do let x; while (false)", SyntaxError); 61TestLocalThrows("while (false) let x;", SyntaxError); 62 63TestLocalDoesNotThrow("if (true) var x;"); 64TestLocalDoesNotThrow("do var x; while (false)"); 65TestLocalDoesNotThrow("while (false) var x;"); 66