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
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
|
/* The contents of this file are subject to the Netscape Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is Mozilla Communicator client code, released March
* 31, 1998.
*
* The Initial Developer of the Original Code is Netscape Communications
* Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*
*/
/**
File Name: 11.5.2.js
ECMA Section: 11.5.2 Applying the / operator
Description:
The / operator performs division, producing the quotient of its operands.
The left operand is the dividend and the right operand is the divisor.
ECMAScript does not perform integer division. The operands and result of all
division operations are double-precision floating-point numbers.
The result of division is determined by the specification of IEEE 754 arithmetic:
If either operand is NaN, the result is NaN.
The sign of the result is positive if both operands have the same sign, negative if the operands have different
signs.
Division of an infinity by an infinity results in NaN.
Division of an infinity by a zero results in an infinity. The sign is determined by the rule already stated above.
Division of an infinity by a non-zero finite value results in a signed infinity. The sign is determined by the rule
already stated above.
Division of a finite value by an infinity results in zero. The sign is determined by the rule already stated above.
Division of a zero by a zero results in NaN; division of zero by any other finite value results in zero, with the sign
determined by the rule already stated above.
Division of a non-zero finite value by a zero results in a signed infinity. The sign is determined by the rule
already stated above.
In the remaining cases, where neither an infinity, nor a zero, nor NaN is involved, the quotient is computed and
rounded to the nearest representable value using IEEE 754 round-to-nearest mode. If the magnitude is too
large to represent, we say the operation overflows; the result is then an infinity of appropriate sign. If the
magnitude is too small to represent, we say the operation underflows and the result is a zero of the appropriate
sign. The ECMAScript language requires support of gradual underflow as defined by IEEE 754.
Author: christine@netscape.com
Date: 12 november 1997
*/
var SECTION = "11.5.2";
var VERSION = "ECMA_1";
startTest();
var testcases = getTestCases();
var BUGNUMBER="111202";
writeHeaderToLog( SECTION + " Applying the / operator");
test();
function test() {
for ( tc=0; tc < testcases.length; tc++ ) {
testcases[tc].passed = writeTestCaseResult(
testcases[tc].expect,
testcases[tc].actual,
testcases[tc].description +" = "+
testcases[tc].actual );
testcases[tc].reason += ( testcases[tc].passed ) ? "" : "wrong value ";
}
stopTest();
return ( testcases );
}
function getTestCases() {
var array = new Array();
var item = 0;
// if either operand is NaN, the result is NaN.
array[item++] = new TestCase( SECTION, "Number.NaN / Number.NaN", Number.NaN, Number.NaN / Number.NaN );
array[item++] = new TestCase( SECTION, "Number.NaN / 1", Number.NaN, Number.NaN / 1 );
array[item++] = new TestCase( SECTION, "1 / Number.NaN", Number.NaN, 1 / Number.NaN );
array[item++] = new TestCase( SECTION, "Number.POSITIVE_INFINITY / Number.NaN", Number.NaN, Number.POSITIVE_INFINITY / Number.NaN );
array[item++] = new TestCase( SECTION, "Number.NEGATIVE_INFINITY / Number.NaN", Number.NaN, Number.NEGATIVE_INFINITY / Number.NaN );
// Division of an infinity by an infinity results in NaN.
array[item++] = new TestCase( SECTION, "Number.NEGATIVE_INFINITY / Number.NEGATIVE_INFINITY", Number.NaN, Number.NEGATIVE_INFINITY / Number.NEGATIVE_INFINITY );
array[item++] = new TestCase( SECTION, "Number.POSITIVE_INFINITY / Number.NEGATIVE_INFINITY", Number.NaN, Number.POSITIVE_INFINITY / Number.NEGATIVE_INFINITY );
array[item++] = new TestCase( SECTION, "Number.NEGATIVE_INFINITY / Number.POSITIVE_INFINITY", Number.NaN, Number.NEGATIVE_INFINITY / Number.POSITIVE_INFINITY );
array[item++] = new TestCase( SECTION, "Number.POSITIVE_INFINITY / Number.POSITIVE_INFINITY", Number.NaN, Number.POSITIVE_INFINITY / Number.POSITIVE_INFINITY );
// Division of an infinity by a zero results in an infinity.
array[item++] = new TestCase( SECTION, "Number.POSITIVE_INFINITY / 0", Number.POSITIVE_INFINITY, Number.POSITIVE_INFINITY / 0 );
array[item++] = new TestCase( SECTION, "Number.NEGATIVE_INFINITY / 0", Number.NEGATIVE_INFINITY, Number.NEGATIVE_INFINITY / 0 );
array[item++] = new TestCase( SECTION, "Number.POSITIVE_INFINITY / -0", Number.NEGATIVE_INFINITY, Number.POSITIVE_INFINITY / -0 );
array[item++] = new TestCase( SECTION, "Number.NEGATIVE_INFINITY / -0", Number.POSITIVE_INFINITY, Number.NEGATIVE_INFINITY / -0 );
// Division of an infinity by a non-zero finite value results in a signed infinity.
array[item++] = new TestCase( SECTION, "Number.NEGATIVE_INFINITY / 1 ", Number.NEGATIVE_INFINITY, Number.NEGATIVE_INFINITY / 1 );
array[item++] = new TestCase( SECTION, "Number.NEGATIVE_INFINITY / -1 ", Number.POSITIVE_INFINITY, Number.NEGATIVE_INFINITY / -1 );
array[item++] = new TestCase( SECTION, "Number.POSITIVE_INFINITY / 1 ", Number.POSITIVE_INFINITY, Number.POSITIVE_INFINITY / 1 );
array[item++] = new TestCase( SECTION, "Number.POSITIVE_INFINITY / -1 ", Number.NEGATIVE_INFINITY, Number.POSITIVE_INFINITY / -1 );
array[item++] = new TestCase( SECTION, "Number.NEGATIVE_INFINITY / Number.MAX_VALUE ", Number.NEGATIVE_INFINITY, Number.NEGATIVE_INFINITY / Number.MAX_VALUE );
array[item++] = new TestCase( SECTION, "Number.NEGATIVE_INFINITY / -Number.MAX_VALUE ", Number.POSITIVE_INFINITY, Number.NEGATIVE_INFINITY / -Number.MAX_VALUE );
array[item++] = new TestCase( SECTION, "Number.POSITIVE_INFINITY / Number.MAX_VALUE ", Number.POSITIVE_INFINITY, Number.POSITIVE_INFINITY / Number.MAX_VALUE );
array[item++] = new TestCase( SECTION, "Number.POSITIVE_INFINITY / -Number.MAX_VALUE ", Number.NEGATIVE_INFINITY, Number.POSITIVE_INFINITY / -Number.MAX_VALUE );
// Division of a finite value by an infinity results in zero.
array[item++] = new TestCase( SECTION, "1 / Number.NEGATIVE_INFINITY", -0, 1 / Number.NEGATIVE_INFINITY );
array[item++] = new TestCase( SECTION, "1 / Number.POSITIVE_INFINITY", 0, 1 / Number.POSITIVE_INFINITY );
array[item++] = new TestCase( SECTION, "-1 / Number.POSITIVE_INFINITY", -0, -1 / Number.POSITIVE_INFINITY );
array[item++] = new TestCase( SECTION, "-1 / Number.NEGATIVE_INFINITY", 0, -1 / Number.NEGATIVE_INFINITY );
array[item++] = new TestCase( SECTION, "Number.MAX_VALUE / Number.NEGATIVE_INFINITY", -0, Number.MAX_VALUE / Number.NEGATIVE_INFINITY );
array[item++] = new TestCase( SECTION, "Number.MAX_VALUE / Number.POSITIVE_INFINITY", 0, Number.MAX_VALUE / Number.POSITIVE_INFINITY );
array[item++] = new TestCase( SECTION, "-Number.MAX_VALUE / Number.POSITIVE_INFINITY", -0, -Number.MAX_VALUE / Number.POSITIVE_INFINITY );
array[item++] = new TestCase( SECTION, "-Number.MAX_VALUE / Number.NEGATIVE_INFINITY", 0, -Number.MAX_VALUE / Number.NEGATIVE_INFINITY );
// Division of a zero by a zero results in NaN
array[item++] = new TestCase( SECTION, "0 / -0", Number.NaN, 0 / -0 );
array[item++] = new TestCase( SECTION, "-0 / 0", Number.NaN, -0 / 0 );
array[item++] = new TestCase( SECTION, "-0 / -0", Number.NaN, -0 / -0 );
array[item++] = new TestCase( SECTION, "0 / 0", Number.NaN, 0 / 0 );
// division of zero by any other finite value results in zero
array[item++] = new TestCase( SECTION, "0 / 1", 0, 0 / 1 );
array[item++] = new TestCase( SECTION, "0 / -1", -0, 0 / -1 );
array[item++] = new TestCase( SECTION, "-0 / 1", -0, -0 / 1 );
array[item++] = new TestCase( SECTION, "-0 / -1", 0, -0 / -1 );
// Division of a non-zero finite value by a zero results in a signed infinity.
array[item++] = new TestCase( SECTION, "1 / 0", Number.POSITIVE_INFINITY, 1/0 );
array[item++] = new TestCase( SECTION, "1 / -0", Number.NEGATIVE_INFINITY, 1/-0 );
array[item++] = new TestCase( SECTION, "-1 / 0", Number.NEGATIVE_INFINITY, -1/0 );
array[item++] = new TestCase( SECTION, "-1 / -0", Number.POSITIVE_INFINITY, -1/-0 );
array[item++] = new TestCase( SECTION, "0 / Number.POSITIVE_INFINITY", 0, 0 / Number.POSITIVE_INFINITY );
array[item++] = new TestCase( SECTION, "0 / Number.NEGATIVE_INFINITY", -0, 0 / Number.NEGATIVE_INFINITY );
array[item++] = new TestCase( SECTION, "-0 / Number.POSITIVE_INFINITY", -0, -0 / Number.POSITIVE_INFINITY );
array[item++] = new TestCase( SECTION, "-0 / Number.NEGATIVE_INFINITY", 0, -0 / Number.NEGATIVE_INFINITY );
return ( array );
}
|
