| <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>S15.8.2.7_A6</p> |
| <div id='console'></div> |
| <script> |
| try { |
| |
| /** |
| * @name: S15.8.2.7_A6; |
| * @section: 15.8.2.7; |
| * @assertion: Cosine is a periodic function with period 2*PI; |
| * @description: Checking if Math.cos(x) equals to Math.cos(x+n*2*Math.PI) with precision 0.000000000003, where n is an integer from 1 to 100 and x is one of 10 float point values from -Math.PI to +Math.PI; |
| */ |
| |
| // CHECK#1 |
| prec = 0.000000000003; |
| //prec = 0.000000000000001; |
| period = 2*Math.PI; |
| pernum = 100; |
| |
| a = -pernum * period; |
| b = pernum * period; |
| snum = 9; |
| step = period/snum + 0.0; |
| x = new Array(); |
| for (i = 0; i < snum; i++) |
| { |
| x[i] = a + i*step; |
| } |
| x[9] = a + period; |
| |
| var curval; |
| var curx; |
| var j; |
| for (i = 0; i < snum; i++) |
| { |
| curval = Math.cos(x[i]); |
| curx = x[i] + period; |
| j = 0; |
| while (curx <= b) |
| { |
| curx += period; |
| j++; |
| if (Math.abs(Math.cos(curx) - curval) >= prec) |
| { |
| testFailed("#1: cos is found out to not be periodic:\n Math.abs(Math.cos(" + x[i] + ") - Math.cos(" + x[i] + " + 2*Math.PI*" + j + ")) >= " + prec + "\n Math.cos(" + x[i] + ") === " + curval + "\n Math.cos(" + curx + ") === " + Math.cos(curx)); |
| } |
| } |
| } |
| |
| } 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> |
