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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: 15.8.2.2.js
+ ECMA Section: 15.8.2.2 acos( x )
+ Description: return an approximation to the arc cosine of the
+ argument. the result is expressed in radians and
+ range is from +0 to +PI. special cases:
+ - if x is NaN, return NaN
+ - if x > 1, the result is NaN
+ - if x < -1, the result is NaN
+ - if x == 1, the result is +0
+ Author: christine@netscape.com
+ Date: 7 july 1997
+*/
+var SECTION = "15.8.2.2";
+var TITLE = "Math.acos()";
+
+writeHeaderToLog( SECTION + " "+ TITLE);
+
+new TestCase(
+ "Math.acos.length",
+ 1,
+ Math.acos.length );
+
+new TestCase(
+ "Math.acos(void 0)",
+ Number.NaN,
+ Math.acos(void 0) );
+
+new TestCase(
+ "Math.acos()",
+ Number.NaN,
+ Math.acos() );
+
+new TestCase(
+ "Math.acos(null)",
+ Math.PI/2,
+ Math.acos(null) );
+
+new TestCase(
+ "Math.acos(NaN)",
+ Number.NaN,
+ Math.acos(Number.NaN) );
+
+new TestCase(
+ "Math.acos(a string)",
+ Number.NaN,
+ Math.acos("a string") );
+
+new TestCase(
+ "Math.acos('0')",
+ Math.PI/2,
+ Math.acos('0') );
+
+new TestCase(
+ "Math.acos('1')",
+ 0,
+ Math.acos('1') );
+
+new TestCase(
+ "Math.acos('-1')",
+ Math.PI,
+ Math.acos('-1') );
+
+new TestCase(
+ "Math.acos(1.00000001)",
+ Number.NaN,
+ Math.acos(1.00000001) );
+
+new TestCase(
+ "Math.acos(11.00000001)",
+ Number.NaN,
+ Math.acos(-1.00000001) );
+
+new TestCase(
+ "Math.acos(1)",
+ 0,
+ Math.acos(1) );
+
+new TestCase(
+ "Math.acos(-1)",
+ Math.PI,
+ Math.acos(-1) );
+
+new TestCase(
+ "Math.acos(0)",
+ Math.PI/2,
+ Math.acos(0) );
+
+new TestCase(
+ "Math.acos(-0)",
+ Math.PI/2,
+ Math.acos(-0) );
+
+new TestCase(
+ "Math.acos(Math.SQRT1_2)",
+ Math.PI/4,
+ Math.acos(Math.SQRT1_2));
+
+new TestCase(
+ "Math.acos(-Math.SQRT1_2)",
+ Math.PI/4*3,
+ Math.acos(-Math.SQRT1_2));
+
+new TestCase(
+ "Math.acos(0.9999619230642)",
+ Math.PI/360,
+ Math.acos(0.9999619230642));
+
+new TestCase(
+ "Math.acos(-3.0)",
+ Number.NaN,
+ Math.acos(-3.0));
+
+test();