1// Copyright 2008 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// Check that dynamically introducing conflicting consts/vars 29// is silently ignored (and does not lead to exceptions). 30 31var caught = 0; 32 33eval("const a"); 34try { eval("var a"); } catch (e) { caught++; assertTrue(e instanceof TypeError); } 35assertTrue(typeof a == 'undefined'); 36try { eval("var a = 1"); } catch (e) { caught++; assertTrue(e instanceof TypeError); } 37assertTrue(typeof a == 'undefined'); 38 39eval("const b = 0"); 40try { eval("var b"); } catch (e) { caught++; assertTrue(e instanceof TypeError); } 41assertEquals(0, b); 42try { eval("var b = 1"); } catch (e) { caught++; assertTrue(e instanceof TypeError); } 43assertEquals(0, b); 44assertEquals(0, caught); 45 46eval("var c"); 47try { eval("const c"); } catch (e) { caught++; assertTrue(e instanceof TypeError); } 48assertTrue(typeof c == 'undefined'); 49assertEquals(1, caught); 50try { eval("const c = 1"); } catch (e) { caught++; assertTrue(e instanceof TypeError); } 51assertEquals(undefined, c); 52assertEquals(2, caught); 53 54eval("var d = 0"); 55try { eval("const d"); } catch (e) { caught++; assertTrue(e instanceof TypeError); } 56assertEquals(0, d); 57assertEquals(3, caught); 58try { eval("const d = 1"); } catch (e) { caught++; assertTrue(e instanceof TypeError); } 59assertEquals(0, d); 60assertEquals(4, caught); 61