| <html> |
| <head> |
| <meta charset='utf-8'> |
| <style> |
| .pass { |
| font-weight: bold; |
| color: green; |
| } |
| .fail { |
| font-weight: bold; |
| color: red; |
| } |
| </style> |
| |
| <script> |
| if (window.testRunner) |
| testRunner.dumpAsText(); |
| |
| function SputnikError(message) |
| { |
| this.message = message; |
| } |
| |
| SputnikError.prototype.toString = function () |
| { |
| return 'SputnikError: ' + this.message; |
| }; |
| |
| var sputnikException; |
| |
| function testPrint(msg) |
| { |
| var span = document.createElement("span"); |
| document.getElementById("console").appendChild(span); // insert it first so XHTML knows the namespace |
| span.innerHTML = msg + '<br />'; |
| } |
| |
| function escapeHTML(text) |
| { |
| return text.toString().replace(/&/g, "&").replace(/</g, "<"); |
| } |
| |
| function printTestPassed(msg) |
| { |
| testPrint('<span><span class="pass">PASS</span> ' + escapeHTML(msg) + '</span>'); |
| } |
| |
| function printTestFailed(msg) |
| { |
| testPrint('<span><span class="fail">FAIL</span> ' + escapeHTML(msg) + '</span>'); |
| } |
| |
| function testFailed(msg) |
| { |
| throw new SputnikError(msg); |
| } |
| |
| var successfullyParsed = false; |
| </script> |
| |
| </head> |
| <body> |
| <p>S15.8.2.5_A18</p> |
| <div id='console'></div> |
| <script> |
| try { |
| |
| /** |
| * @name: S15.8.2.5_A18; |
| * @section: 15.8.2.5; |
| * @assertion: If y is +Infinity and x is finite, Math.atan2(y,x) is an implementation-dependent approximation to +PI/2; |
| * @description: Checking if Math.atan2(y,x) is an approximation to +PI/2, where y is +Infinity and x is finite; |
| */ |
| |
| function getPrecision(num) |
| { |
| //TODO: Create a table of prec's, |
| // because using Math for testing Math isn't that correct. |
| |
| log2num = Math.log(Math.abs(num))/Math.LN2; |
| pernum = Math.ceil(log2num); |
| return(2 * Math.pow(2, -52 + pernum)); |
| //return(0); |
| } |
| |
| |
| var prec; |
| function isEqual(num1, num2) |
| { |
| if ((num1 === Infinity)&&(num2 === Infinity)) |
| { |
| return(true); |
| } |
| if ((num1 === -Infinity)&&(num2 === -Infinity)) |
| { |
| return(true); |
| } |
| prec = getPrecision(Math.min(Math.abs(num1), Math.abs(num2))); |
| return(Math.abs(num1 - num2) <= prec); |
| //return(num1 === num2); |
| } |
| |
| |
| |
| // CHECK#1 |
| y = +Infinity; |
| x = new Array(); |
| x[0] = 0.000000000000001; |
| x[1] = 1; |
| x[2] = 1.7976931348623157E308; //largest finite number |
| x[3] = -0.000000000000001; |
| x[4] = -1; |
| x[5] = -1.7976931348623157E308; //largest (by module) finite number |
| |
| xnum = 6; |
| |
| for (i = 0; i < xnum; i++) |
| { |
| if (!isEqual(Math.atan2(y,x[i]), (Math.PI)/2)) |
| testFailed("#1: Math.abs(Math.atan2(" + y + ", " + x[i] + ") - (Math.PI/2)) >= " + prec); |
| } |
| |
| } catch (ex) { |
| sputnikException = ex; |
| } |
| |
| var successfullyParsed = true; |
| </script> |
| |
| <script> |
| if (!successfullyParsed) |
| printTestFailed('successfullyParsed is not set'); |
| else if (sputnikException) |
| printTestFailed(sputnikException); |
| else |
| printTestPassed(""); |
| testPrint('<br /><span class="pass">TEST COMPLETE</span>'); |
| </script> |
| </body> |
| </html> |
