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 29 // Test default string representation of an Error object. 30 31 var e = new Error(); 32 assertEquals('Error', e.toString()); 33 34 35 // Test printing of cyclic errors which return the empty string for 36 // compatibility with Safari and Firefox. 37 38 e = new Error(); 39 e.name = e; 40 e.message = e; 41 e.stack = "Does not occur in output"; 42 e.arguments = "Does not occur in output"; 43 e.type = "Does not occur in output"; 44 assertThrows(()=>e.toString(), RangeError); 45 46 e = new Error(); 47 e.name = [ e ]; 48 e.message = [ e ]; 49 e.stack = "Does not occur in output"; 50 e.arguments = "Does not occur in output"; 51 e.type = "Does not occur in output"; 52 assertEquals('', e.toString()); 53 54 55 // Test the sequence in which getters and toString operations are called 56 // on a given Error object. Verify the produced string representation. 57 58 function testErrorToString(nameValue, messageValue) { 59 var seq = []; 60 var e = { 61 get name() { 62 seq.push(1); 63 return (nameValue === undefined) ? nameValue : { 64 toString: function() { seq.push(2); return nameValue; } 65 }; 66 }, 67 get message() { 68 seq.push(3); 69 return (messageValue === undefined) ? messageValue : { 70 toString: function() { seq.push(4); return messageValue; } 71 }; 72 } 73 }; 74 var string = Error.prototype.toString.call(e); 75 return [string,seq]; 76 } 77 78 assertEquals(["Error",[1,3]], testErrorToString(undefined, undefined)); 79 assertEquals(["e1",[1,2,3]], testErrorToString("e1", undefined)); 80 assertEquals(["e1: null",[1,2,3,4]], testErrorToString("e1", null)); 81 assertEquals(["e1",[1,2,3,4]], testErrorToString("e1", "")); 82 assertEquals(["Error: e2",[1,3,4]], testErrorToString(undefined, "e2")); 83 assertEquals(["null: e2",[1,2,3,4]], testErrorToString(null, "e2")); 84 assertEquals(["e2",[1,2,3,4]], testErrorToString("", "e2")); 85 assertEquals(["e1: e2",[1,2,3,4]], testErrorToString("e1", "e2")); 86 87 var obj = { 88 get constructor () { 89 assertUnreachable(); 90 } 91 }; 92 93 assertThrows(function() { obj.x(); }); 94
