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+/* -*- tab-width: 2; indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+
+/**
+ File Name: 15.8.2.4.js
+ ECMA Section: 15.8.2.4 atan( x )
+ Description: return an approximation to the arc tangent of the
+ argument. the result is expressed in radians and
+ range is from -PI/2 to +PI/2. special cases:
+ - if x is NaN, the result is NaN
+ - if x == +0, the result is +0
+ - if x == -0, the result is -0
+ - if x == +Infinity, the result is approximately +PI/2
+ - if x == -Infinity, the result is approximately -PI/2
+ Author: christine@netscape.com
+ Date: 7 july 1997
+
+*/
+
+var SECTION = "15.8.2.4";
+var VERSION = "ECMA_1";
+var TITLE = "Math.atan()";
+var BUGNUMBER="77391";
+
+startTest();
+
+writeHeaderToLog( SECTION + " "+ TITLE);
+
+new TestCase( SECTION,
+ "Math.atan.length",
+ 1,
+ Math.atan.length );
+
+new TestCase( SECTION,
+ "Math.atan()",
+ Number.NaN,
+ Math.atan() );
+
+new TestCase( SECTION,
+ "Math.atan(void 0)",
+ Number.NaN,
+ Math.atan(void 0) );
+
+new TestCase( SECTION,
+ "Math.atan(null)",
+ 0,
+ Math.atan(null) );
+
+new TestCase( SECTION,
+ "Math.atan(NaN)",
+ Number.NaN,
+ Math.atan(Number.NaN) );
+
+new TestCase( SECTION,
+ "Math.atan('a string')",
+ Number.NaN,
+ Math.atan("a string") );
+
+new TestCase( SECTION,
+ "Math.atan('0')",
+ 0,
+ Math.atan('0') );
+
+new TestCase( SECTION,
+ "Math.atan('1')",
+ Math.PI/4,
+ Math.atan('1') );
+
+new TestCase( SECTION,
+ "Math.atan('-1')",
+ -Math.PI/4,
+ Math.atan('-1') );
+
+new TestCase( SECTION,
+ "Math.atan('Infinity)",
+ Math.PI/2,
+ Math.atan('Infinity') );
+
+new TestCase( SECTION,
+ "Math.atan('-Infinity)",
+ -Math.PI/2,
+ Math.atan('-Infinity') );
+
+new TestCase( SECTION,
+ "Math.atan(0)",
+ 0,
+ Math.atan(0) );
+
+new TestCase( SECTION,
+ "Math.atan(-0)",
+ -0,
+ Math.atan(-0) );
+
+new TestCase( SECTION,
+ "Infinity/Math.atan(-0)",
+ -Infinity,
+ Infinity/Math.atan(-0) );
+
+new TestCase( SECTION,
+ "Math.atan(Infinity)",
+ Math.PI/2,
+ Math.atan(Number.POSITIVE_INFINITY) );
+
+new TestCase( SECTION,
+ "Math.atan(-Infinity)",
+ -Math.PI/2,
+ Math.atan(Number.NEGATIVE_INFINITY) );
+
+new TestCase( SECTION,
+ "Math.atan(1)",
+ Math.PI/4,
+ Math.atan(1) );
+
+new TestCase( SECTION,
+ "Math.atan(-1)",
+ -Math.PI/4,
+ Math.atan(-1) );
+
+test();