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