| <!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"> |
| <testcase id="testcase1"></testcase> |
| <testcase id="testcase2"></testcase> |
| <testcase id="testcase3"></testcase> |
| <testcase id="testcase4"></testcase> |
| <testcase id="testcase5"></testcase> |
| </div> |
| </body> |
| <script> |
| description('Test cases of :nth-last-child() matching only the last child.'); |
| |
| function testQuerySelector(selector, expectedIds) { |
| shouldBe("document.querySelectorAll('" + selector + "').length", '' + expectedIds.length); |
| for (var i = 0; i < expectedIds.length; ++i) |
| shouldBeEqualToString("document.querySelectorAll('" + selector + "')[" + i + "].id", expectedIds[i]); |
| } |
| |
| function testStyling(selector, expectedIds) { |
| var stylingElement = document.getElementById("style"); |
| stylingElement.innerHTML = '' + selector + ' { background-color: rgb(10, 100, 200); }'; |
| |
| var allTestCases = document.querySelectorAll("#test-root *"); |
| for (var i = 0; i < allTestCases.length; ++i) { |
| var expectMatch = expectedIds.indexOf(allTestCases[i].id) >= 0; |
| shouldBeEqualToString('getComputedStyle(document.querySelectorAll("#test-root *")[' + i + ']).backgroundColor', expectMatch ? 'rgb(10, 100, 200)' : 'rgb(255, 0, 0)'); |
| } |
| |
| stylingElement.innerHTML = ''; |
| } |
| |
| function testSelector(selector, expectedIds) { |
| debug("Testing \"" + selector + "\""); |
| testQuerySelector("#test-root " + selector, expectedIds); |
| testStyling("#test-root " + selector, expectedIds); |
| debug(""); |
| } |
| |
| // All of thoses only match the last child, they are synonym with :last-child. |
| testSelector(":nth-last-child(1)", ["testcase5"]); |
| testSelector(":nth-last-child(+1)", ["testcase5"]); |
| testSelector(":nth-last-child(-n+1)", ["testcase5"]); |
| testSelector(":nth-last-child(-2n+1)", ["testcase5"]); |
| testSelector(":nth-last-child(-3n+1)", ["testcase5"]); |
| |
| // The above combined with other :nth-last-child(). |
| testSelector(":nth-last-child(odd):nth-last-child(1):nth-last-child(2n+1)", ["testcase5"]); |
| testSelector(":nth-last-child(odd):nth-last-child(+1):nth-last-child(2n+1)", ["testcase5"]); |
| testSelector(":nth-last-child(odd):nth-last-child(-n+1):nth-last-child(2n+1)", ["testcase5"]); |
| testSelector(":nth-last-child(odd):nth-last-child(-2n+1):nth-last-child(2n+1)", ["testcase5"]); |
| testSelector(":nth-last-child(odd):nth-last-child(-3n+1):nth-last-child(2n+1)", ["testcase5"]); |
| |
| // Some related counter examples. |
| testSelector(":nth-last-child(-n-1)", []); |
| |
| testSelector(":nth-last-child(n+1)", ["testcase1", "testcase2", "testcase3", "testcase4", "testcase5"]); |
| testSelector(":nth-last-child(n-1)", ["testcase1", "testcase2", "testcase3", "testcase4", "testcase5"]); |
| </script> |
| <script src="../../resources/js-test-post.js"></script> |
| </html> |
