| <!doctype html> |
| <html> |
| <head> |
| <script src="../../resources/js-test-pre.js"></script> |
| <style> |
| #test-root * { |
| background-color: red; |
| } |
| </style> |
| <style id="style"> |
| </style> |
| </head> |
| <body> |
| <div style="display:none" id="test-root"> |
| </div> |
| </body> |
| <script> |
| description('Test boundaries of :nth-child(An+B).'); |
| |
| // First, let's generate a giant DOM tree to have something to match. |
| |
| function generateSubtree(parent, level) { |
| if (level < 0) |
| return; |
| |
| for (var i = 0; i < level; ++i) { |
| var testCase = document.createElement("testcase"); |
| testCase.className="testclass" |
| generateSubtree(testCase, level - 1); |
| parent.appendChild(testCase); |
| } |
| } |
| |
| var testRoot = document.getElementById('test-root'); |
| generateSubtree(testRoot, 7); |
| |
| // Test backtracking nesting. This does not test backtracking correctness, just compilation and execution. |
| var siblingBacktracking = ':nth-child(n+2 of .testclass:nth-child(n+2 of .testclass$$>.testclass>.testclass .testclass)>.testclass>.testclass .testclass)'; |
| var previousChain = ':nth-child(n+2 of .testclass>.testclass>.testclass .testclass)' |
| for (var i = 0; i < 20; ++i) { |
| previousChain = siblingBacktracking.replace('$$', previousChain) |
| shouldBe('document.querySelectorAll("' + previousChain + '").length', '0'); |
| shouldBe('document.querySelectorAll("' + previousChain + '+.testclass+.testclass~testcase").length', '0'); |
| shouldBe('document.querySelectorAll("' + previousChain + '>.testclass>.testclass testcase").length', '0'); |
| shouldBe('document.querySelectorAll("' + previousChain + '+.testclass+.testclass~testcase>.testclass>.testclass testcase").length', '0'); |
| } |
| </script> |
| <script src="../../resources/js-test-post.js"></script> |
| </html> |
