73 lines
2.9 KiB
HTML
73 lines
2.9 KiB
HTML
<!doctype html>
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<html>
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<head>
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<script src="../../resources/js-test-pre.js"></script>
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<style>
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#test-root * {
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background-color: red;
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}
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</style>
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<style id="style">
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</style>
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</head>
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<body>
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<div style="display:none" id="test-root">
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<testcase id="testcase1"></testcase>
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<testcase id="testcase2"></testcase>
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<testcase id="testcase3"></testcase>
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<testcase id="testcase4"></testcase>
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<testcase id="testcase5"></testcase>
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</div>
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</body>
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<script>
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description('Test cases of :nth-last-child() matching only the last child.');
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function testQuerySelector(selector, expectedIds) {
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shouldBe("document.querySelectorAll('" + selector + "').length", '' + expectedIds.length);
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for (var i = 0; i < expectedIds.length; ++i)
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shouldBeEqualToString("document.querySelectorAll('" + selector + "')[" + i + "].id", expectedIds[i]);
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}
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function testStyling(selector, expectedIds) {
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var stylingElement = document.getElementById("style");
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stylingElement.innerHTML = '' + selector + ' { background-color: rgb(10, 100, 200); }';
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var allTestCases = document.querySelectorAll("#test-root *");
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for (var i = 0; i < allTestCases.length; ++i) {
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var expectMatch = expectedIds.indexOf(allTestCases[i].id) >= 0;
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shouldBeEqualToString('getComputedStyle(document.querySelectorAll("#test-root *")[' + i + ']).backgroundColor', expectMatch ? 'rgb(10, 100, 200)' : 'rgb(255, 0, 0)');
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}
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stylingElement.innerHTML = '';
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}
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function testSelector(selector, expectedIds) {
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debug("Testing \"" + selector + "\"");
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testQuerySelector("#test-root " + selector, expectedIds);
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testStyling("#test-root " + selector, expectedIds);
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debug("");
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}
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// All of thoses only match the last child, they are synonym with :last-child.
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testSelector(":nth-last-child(1)", ["testcase5"]);
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testSelector(":nth-last-child(+1)", ["testcase5"]);
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testSelector(":nth-last-child(-n+1)", ["testcase5"]);
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testSelector(":nth-last-child(-2n+1)", ["testcase5"]);
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testSelector(":nth-last-child(-3n+1)", ["testcase5"]);
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// The above combined with other :nth-last-child().
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testSelector(":nth-last-child(odd):nth-last-child(1):nth-last-child(2n+1)", ["testcase5"]);
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testSelector(":nth-last-child(odd):nth-last-child(+1):nth-last-child(2n+1)", ["testcase5"]);
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testSelector(":nth-last-child(odd):nth-last-child(-n+1):nth-last-child(2n+1)", ["testcase5"]);
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testSelector(":nth-last-child(odd):nth-last-child(-2n+1):nth-last-child(2n+1)", ["testcase5"]);
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testSelector(":nth-last-child(odd):nth-last-child(-3n+1):nth-last-child(2n+1)", ["testcase5"]);
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// Some related counter examples.
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testSelector(":nth-last-child(-n-1)", []);
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testSelector(":nth-last-child(n+1)", ["testcase1", "testcase2", "testcase3", "testcase4", "testcase5"]);
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testSelector(":nth-last-child(n-1)", ["testcase1", "testcase2", "testcase3", "testcase4", "testcase5"]);
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</script>
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<script src="../../resources/js-test-post.js"></script>
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</html>
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