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comparison: js/src/tests/ecma/Math/15.8.2.15.js

js/src/tests/ecma/Math/15.8.2.15.js

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1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 /* This Source Code Form is subject to the terms of the Mozilla Public
3 * License, v. 2.0. If a copy of the MPL was not distributed with this
4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
5
6
7 /**
8 File Name: 15.8.2.15.js
9 ECMA Section: 15.8.2.15 Math.round(x)
10 Description: return the greatest number value that is closest to the
11 argument and is an integer. if two integers are equally
12 close to the argument. then the result is the number value
13 that is closer to Infinity. if the argument is an integer,
14 return the argument.
15 special cases:
16 - if x is NaN return NaN
17 - if x = +0 return +0
18 - if x = -0 return -0
19 - if x = Infinity return Infinity
20 - if x = -Infinity return -Infinity
21 - if 0 < x < 0.5 return 0
22 - if -0.5 <= x < 0 return -0
23 example:
24 Math.round( 3.5 ) == 4
25 Math.round( -3.5 ) == 3
26 also:
27 - Math.round(x) == Math.floor( x + 0.5 )
28 except if x = -0. in that case, Math.round(x) = -0
29
30 and Math.floor( x+0.5 ) = +0
31
32
33 Author: christine@netscape.com
34 Date: 7 july 1997
35 */
36
37 var SECTION = "15.8.2.15";
38 var VERSION = "ECMA_1";
39 var TITLE = "Math.round(x)";
40 var BUGNUMBER="331411";
41
42 var EXCLUDE = "true";
43
44 startTest();
45
46 writeHeaderToLog( SECTION + " "+ TITLE);
47
48 new TestCase( SECTION,
49 "Math.round.length",
50 1,
51 Math.round.length );
52
53 new TestCase( SECTION,
54 "Math.round()",
55 Number.NaN,
56 Math.round() );
57
58 new TestCase( SECTION,
59 "Math.round(null)",
60 0,
61 Math.round(0) );
62
63 new TestCase( SECTION,
64 "Math.round(void 0)",
65 Number.NaN,
66 Math.round(void 0) );
67
68 new TestCase( SECTION,
69 "Math.round(true)",
70 1,
71 Math.round(true) );
72
73 new TestCase( SECTION,
74 "Math.round(false)",
75 0,
76 Math.round(false) );
77
78 new TestCase( SECTION,
79 "Math.round('.99999')",
80 1,
81 Math.round('.99999') );
82
83 new TestCase( SECTION,
84 "Math.round('12345e-2')",
85 123,
86 Math.round('12345e-2') );
87
88 new TestCase( SECTION,
89 "Math.round(NaN)",
90 Number.NaN,
91 Math.round(Number.NaN) );
92
93 new TestCase( SECTION,
94 "Math.round(0)",
95 0,
96 Math.round(0) );
97
98 new TestCase( SECTION,
99 "Math.round(-0)",
100 -0,
101 Math.round(-0));
102
103 new TestCase( SECTION,
104 "Infinity/Math.round(-0)",
105 -Infinity,
106 Infinity/Math.round(-0) );
107
108 new TestCase( SECTION,
109 "Math.round(Infinity)",
110 Number.POSITIVE_INFINITY,
111 Math.round(Number.POSITIVE_INFINITY));
112
113 new TestCase( SECTION,
114 "Math.round(-Infinity)",
115 Number.NEGATIVE_INFINITY,
116 Math.round(Number.NEGATIVE_INFINITY));
117
118 new TestCase( SECTION,
119 "Math.round(0.49)",
120 0,
121 Math.round(0.49));
122
123 new TestCase( SECTION,
124 "Math.round(0.5)",
125 1,
126 Math.round(0.5));
127
128 new TestCase( SECTION,
129 "Math.round(0.51)",
130 1,
131 Math.round(0.51));
132
133 new TestCase( SECTION,
134 "Math.round(-0.49)",
135 -0,
136 Math.round(-0.49));
137
138 new TestCase( SECTION,
139 "Math.round(-0.5)",
140 -0,
141 Math.round(-0.5));
142
143 new TestCase( SECTION,
144 "Infinity/Math.round(-0.49)",
145 -Infinity,
146 Infinity/Math.round(-0.49));
147
148 new TestCase( SECTION,
149 "Infinity/Math.round(-0.5)",
150 -Infinity,
151 Infinity/Math.round(-0.5));
152
153 new TestCase( SECTION,
154 "Math.round(-0.51)",
155 -1,
156 Math.round(-0.51));
157
158 new TestCase( SECTION,
159 "Math.round(3.5)",
160 4,
161 Math.round(3.5));
162
163 new TestCase( SECTION,
164 "Math.round(-3.5)",
165 -3,
166 Math.round(-3));
167
168 test();

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