1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
|
// Copyright 2012 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.
// Number.prototype methods on non-Numbers.
assertThrows(function() { Number.prototype.toExponential.call({}) },
TypeError);
assertThrows(function() { Number.prototype.toPrecision.call({}) },
TypeError);
assertThrows(function() { Number.prototype.toFixed.call({}) },
TypeError);
assertThrows(function() { Number.prototype.toString.call({}) },
TypeError);
assertThrows(function() { Number.prototype.toLocaleString.call({}) },
TypeError);
assertThrows(function() { Number.prototype.ValueOf.call({}) },
TypeError);
// Call on Number objects with custom valueOf method.
var x_obj = new Number(1);
x_obj.valueOf = function() { assertUnreachable(); };
assertEquals("1.00e+0",
Number.prototype.toExponential.call(x_obj, 2));
assertEquals("1.0",
Number.prototype.toPrecision.call(x_obj, 2));
assertEquals("1.00",
Number.prototype.toFixed.call(x_obj, 2));
// Call on primitive numbers.
assertEquals("1.00e+0",
Number.prototype.toExponential.call(1, 2));
assertEquals("1.0",
Number.prototype.toPrecision.call(1, 2));
assertEquals("1.00",
Number.prototype.toFixed.call(1, 2));
// toExponential and toPrecision does following steps in order
// 1) convert the argument using ToInteger
// 2) check for non-finite receiver, on which it returns,
// 3) check argument range and throw exception if out of range.
// Note that the the last two steps are reversed for toFixed.
// Luckily, the receiver is expected to be a number or number
// wrapper, so that getting its value is not observable.
var f_flag = false;
var f_obj = { valueOf: function() { f_flag = true; return 1000; } };
assertEquals("NaN",
Number.prototype.toExponential.call(NaN, f_obj));
assertTrue(f_flag);
f_flag = false;
assertEquals("Infinity",
Number.prototype.toExponential.call(1/0, f_obj));
assertTrue(f_flag);
f_flag = false;
assertEquals("-Infinity",
Number.prototype.toExponential.call(-1/0, f_obj));
assertTrue(f_flag);
f_flag = false;
assertEquals("NaN",
Number.prototype.toPrecision.call(NaN, f_obj));
assertTrue(f_flag);
f_flag = false;
assertEquals("Infinity",
Number.prototype.toPrecision.call(1/0, f_obj));
assertTrue(f_flag);
f_flag = false;
assertEquals("-Infinity",
Number.prototype.toPrecision.call(-1/0, f_obj));
assertTrue(f_flag);
// The odd man out: toFixed.
f_flag = false;
assertThrows(function() { Number.prototype.toFixed.call(NaN, f_obj) },
RangeError);
assertTrue(f_flag);
f_flag = false;
assertThrows(function() { Number.prototype.toFixed.call(1/0, f_obj) },
RangeError);
assertTrue(f_flag);
f_flag = false;
assertThrows(function() { Number.prototype.toFixed.call(-1/0, f_obj) },
RangeError);
assertTrue(f_flag);
|
