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41 File Name: 15.8.2.9.js
42 ECMA Section: 15.8.2.9 Math.floor(x)
43 Description: return the greatest number value that is not greater
44 than the argument and is equal to a mathematical integer.
45 if the number is already an integer, return the number
46 itself. special cases:
47 - if x is NaN return NaN
50 - if x = Infinity return Infinity
51 - if x = -Infinity return -Infinity
52 - if ( -1 < x < 0 ) return -0
54 - the value of Math.floor(x) == -Math.ceil(-x)
55 Author: christine@netscape.com
59 var SECTION = "15.8.2.9";
60 var VERSION = "ECMA_1";
62 var TITLE = "Math.floor(x)";
64 writeHeaderToLog( SECTION + " "+ TITLE);
66 new TestCase( SECTION,
71 new TestCase( SECTION,
76 new TestCase( SECTION,
81 new TestCase( SECTION,
86 new TestCase( SECTION,
91 new TestCase( SECTION,
96 new TestCase( SECTION,
101 new TestCase( SECTION,
102 "Math.floor('-1.1')",
104 Math.floor("-1.1") );
106 new TestCase( SECTION,
111 new TestCase( SECTION,
112 "Math.floor('-0.1')",
114 Math.floor("-0.1") );
116 new TestCase( SECTION,
119 Math.floor(Number.NaN) );
121 new TestCase( SECTION,
122 "Math.floor(NaN)==-Math.ceil(-NaN)",
124 Math.floor(Number.NaN) == -Math.ceil(-Number.NaN) );
126 new TestCase( SECTION,
131 new TestCase( SECTION,
132 "Math.floor(0)==-Math.ceil(-0)",
134 Math.floor(0) == -Math.ceil(-0) );
136 new TestCase( SECTION,
141 new TestCase( SECTION,
142 "Infinity/Math.floor(-0)",
144 Infinity/Math.floor(-0) );
146 new TestCase( SECTION,
147 "Math.floor(-0)==-Math.ceil(0)",
149 Math.floor(-0)== -Math.ceil(0) );
151 new TestCase( SECTION,
152 "Math.floor(Infinity)",
153 Number.POSITIVE_INFINITY,
154 Math.floor(Number.POSITIVE_INFINITY) );
156 new TestCase( SECTION,
157 "Math.floor(Infinity)==-Math.ceil(-Infinity)",
159 Math.floor(Number.POSITIVE_INFINITY) == -Math.ceil(Number.NEGATIVE_INFINITY) );
161 new TestCase( SECTION,
162 "Math.floor(-Infinity)",
163 Number.NEGATIVE_INFINITY,
164 Math.floor(Number.NEGATIVE_INFINITY) );
166 new TestCase( SECTION,
167 "Math.floor(-Infinity)==-Math.ceil(Infinity)",
169 Math.floor(Number.NEGATIVE_INFINITY) == -Math.ceil(Number.POSITIVE_INFINITY) );
171 new TestCase( SECTION,
172 "Math.floor(0.0000001)",
174 Math.floor(0.0000001) );
176 new TestCase( SECTION,
177 "Math.floor(0.0000001)==-Math.ceil(0.0000001)", true,
178 Math.floor(0.0000001)==-Math.ceil(-0.0000001) );
180 new TestCase( SECTION,
181 "Math.floor(-0.0000001)",
183 Math.floor(-0.0000001) );
185 new TestCase( SECTION,
186 "Math.floor(0.0000001)==-Math.ceil(0.0000001)",
188 Math.floor(-0.0000001)==-Math.ceil(0.0000001) );