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41 File Name: 15.8.2.4.js
42 ECMA Section: 15.8.2.4 atan( x )
43 Description: return an approximation to the arc tangent of the
44 argument. the result is expressed in radians and
45 range is from -PI/2 to +PI/2. special cases:
46 - if x is NaN, the result is NaN
47 - if x == +0, the result is +0
48 - if x == -0, the result is -0
49 - if x == +Infinity, the result is approximately +PI/2
50 - if x == -Infinity, the result is approximately -PI/2
51 Author: christine@netscape.com
56 var SECTION = "15.8.2.4";
57 var VERSION = "ECMA_1";
58 var TITLE = "Math.atan()";
59 var BUGNUMBER="77391";
63 writeHeaderToLog( SECTION + " "+ TITLE);
65 new TestCase( SECTION,
70 new TestCase( SECTION,
75 new TestCase( SECTION,
80 new TestCase( SECTION,
85 new TestCase( SECTION,
88 Math.atan(Number.NaN) );
90 new TestCase( SECTION,
91 "Math.atan('a string')",
93 Math.atan("a string") );
95 new TestCase( SECTION,
100 new TestCase( SECTION,
105 new TestCase( SECTION,
110 new TestCase( SECTION,
111 "Math.atan('Infinity)",
113 Math.atan('Infinity') );
115 new TestCase( SECTION,
116 "Math.atan('-Infinity)",
118 Math.atan('-Infinity') );
120 new TestCase( SECTION,
125 new TestCase( SECTION,
130 new TestCase( SECTION,
131 "Infinity/Math.atan(-0)",
133 Infinity/Math.atan(-0) );
135 new TestCase( SECTION,
136 "Math.atan(Infinity)",
138 Math.atan(Number.POSITIVE_INFINITY) );
140 new TestCase( SECTION,
141 "Math.atan(-Infinity)",
143 Math.atan(Number.NEGATIVE_INFINITY) );
145 new TestCase( SECTION,
150 new TestCase( SECTION,