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
31var e = new Error();
32assertEquals('Error', e.toString());
33
34
35// Test printing of cyclic errors which return the empty string for
36// compatibility with Safari and Firefox.
37
38e = new Error();
39e.name = e;
40e.message = e;
41e.stack = "Does not occur in output";
42e.arguments = "Does not occur in output";
43e.type = "Does not occur in output";
44assertEquals('', e.toString());
45
46e = new Error();
47e.name = [ e ];
48e.message = [ e ];
49e.stack = "Does not occur in output";
50e.arguments = "Does not occur in output";
51e.type = "Does not occur in output";
52assertEquals('', 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
58function 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
78assertEquals(["Error",[1,3]], testErrorToString(undefined, undefined));
79assertEquals(["e1",[1,2,3]], testErrorToString("e1", undefined));
80assertEquals(["e1: null",[1,2,3,4]], testErrorToString("e1", null));
81assertEquals(["e1",[1,2,3,4]], testErrorToString("e1", ""));
82assertEquals(["Error: e2",[1,3,4]], testErrorToString(undefined, "e2"));
83assertEquals(["null: e2",[1,2,3,4]], testErrorToString(null, "e2"));
84assertEquals(["e2",[1,2,3,4]], testErrorToString("", "e2"));
85assertEquals(["e1: e2",[1,2,3,4]], testErrorToString("e1", "e2"));
86
87var obj = {
88  get constructor () {
89    assertUnreachable();
90  }
91};
92
93assertThrows(function() { obj.x(); });
94