JSTests/test262/test/built-ins/Math/atan2/S15.8.2.5_A1.js

// Copyright 2009 the Sputnik authors.  All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.

/*---
info: If either x or y is NaN, Math(x,y) is NaN
es5id: 15.8.2.5_A1
description: >
    Checking if Math.atan2(NaN,y) and Math.atan2(x,NaN) is NaN for
    different x and y values
---*/

// CHECK#1

var vals = new Array();
vals[0] = -Infinity;
vals[1] = -0.000000000000001;
vals[2] = -0;
vals[3] = +0
vals[4] = 0.000000000000001;
vals[5] = +Infinity;
vals[6] = NaN;
var valnum = 7;

var args = new Array();
for (var i = 0; i < 2; i++)
{
  args[i] = NaN;
  for (var j = 0; j < valnum; j++)
  {
    args[1 - i] = vals[j];
    assert.sameValue(
      Math.atan2(args[0], args[1]),
      NaN,
      "(" + args[0] + ", " + args[1] + ")"
    );
  }
}