mozilla-central/testing/web-platform/tests/dom/nodes/Element-classlist.html

Source code

Revision control

Copy as Markdown

Other Tools

Test Info:

<!doctype html>
<meta charset=utf-8>
<title>Test for the classList element attribute</title>
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<div id="content"></div>
<script>
const SVG_NS = "http://www.w3.org/2000/svg";
const XHTML_NS = "http://www.w3.org/1999/xhtml"
const MATHML_NS = "http://www.w3.org/1998/Math/MathML";
function setClass(e, newVal) {
if (newVal === null) {
e.removeAttribute("class");
} else {
e.setAttribute("class", newVal);
}
}
function checkModification(e, funcName, args, expectedRes, before, after,
expectedException, desc) {
if (!Array.isArray(args)) {
args = [args];
}
test(function() {
var shouldThrow = typeof(expectedException) === "string";
if (shouldThrow) {
// If an exception is thrown, the class attribute shouldn't change.
after = before;
}
setClass(e, before);
var obs;
// If we have MutationObservers available, do some checks to make
// sure attribute sets are happening at sane times.
if (self.MutationObserver) {
obs = new MutationObserver(() => {});
obs.observe(e, { attributes: true });
}
if (shouldThrow) {
assert_throws_dom(expectedException, function() {
var list = e.classList;
var res = list[funcName].apply(list, args);
});
} else {
var list = e.classList;
var res = list[funcName].apply(list, args);
}
if (obs) {
var mutationRecords = obs.takeRecords();
obs.disconnect();
if (shouldThrow) {
assert_equals(mutationRecords.length, 0,
"There should have been no mutation");
} else if (funcName == "replace") {
assert_equals(mutationRecords.length == 1,
expectedRes,
"Should have a mutation exactly when replace() returns true");
} else {
// For other functions, would need to check when exactly
// mutations are supposed to happen.
}
}
if (!shouldThrow) {
assert_equals(res, expectedRes, "wrong return value");
}
var expectedAfter = after;
assert_equals(e.getAttribute("class"), expectedAfter,
"wrong class after modification");
}, "classList." + funcName + "(" + args.map(format_value).join(", ") +
") with attribute value " + format_value(before) + desc);
}
function assignToClassListStrict(e) {
"use strict";
e.classList = "foo";
e.removeAttribute("class");
}
function assignToClassList(e) {
var expect = e.classList;
e.classList = "foo";
assert_equals(e.classList, expect,
"classList should be unchanged after assignment");
e.removeAttribute("class");
}
function testClassList(e, desc) {
// assignment
test(function() {
assignToClassListStrict(e);
assignToClassList(e);
}, "Assigning to classList" + desc);
// supports
test(function() {
assert_throws_js(TypeError, function() {
e.classList.supports("a");
})
}, ".supports() must throw TypeError" + desc);
// length attribute
function checkLength(value, length) {
test(function() {
setClass(e, value);
assert_equals(e.classList.length, length);
}, "classList.length when " +
(value === null ? "removed" : "set to " + format_value(value)) + desc);
}
checkLength(null, 0);
checkLength("", 0);
checkLength(" \t \f", 0);
checkLength("a", 1);
checkLength("a A", 2);
checkLength("\r\na\t\f", 1);
checkLength("a a", 1);
checkLength("a a a a a a", 1);
checkLength("a a b b", 2);
checkLength("a A B b", 4);
checkLength("a b c c b a a b c c", 3);
checkLength(" a a b", 2);
checkLength("a\tb\nc\fd\re f", 6);
// [Stringifies]
function checkStringifier(value, expected) {
test(function() {
setClass(e, value);
assert_equals(e.classList.toString(), expected);
}, "classList.toString() when " +
(value === null ? "removed" : "set to " + format_value(value)) + desc);
}
checkStringifier(null, "");
checkStringifier("foo", "foo");
checkStringifier(" a a b", " a a b");
// item() method
function checkItems(attributeValue, expectedValues) {
function checkItemFunction(index, expected) {
assert_equals(e.classList.item(index), expected,
"classList.item(" + index + ")");
}
function checkItemArray(index, expected) {
assert_equals(e.classList[index], expected, "classList[" + index + "]");
}
test(function() {
setClass(e, attributeValue);
checkItemFunction(-1, null);
checkItemArray(-1, undefined);
var i = 0;
while (i < expectedValues.length) {
checkItemFunction(i, expectedValues[i]);
checkItemArray(i, expectedValues[i]);
i++;
}
checkItemFunction(i, null);
checkItemArray(i, undefined);
checkItemFunction(0xffffffff, null);
checkItemArray(0xffffffff, undefined);
checkItemFunction(0xfffffffe, null);
checkItemArray(0xfffffffe, undefined);
}, "classList.item() when set to " + format_value(attributeValue) + desc);
}
checkItems(null, []);
checkItems("a", ["a"]);
checkItems("aa AA aa", ["aa", "AA"]);
checkItems("a b", ["a", "b"]);
checkItems(" a a b", ["a", "b"]);
checkItems("\t\n\f\r a\t\n\f\r b\t\n\f\r ", ["a", "b"]);
// contains() method
function checkContains(attributeValue, args, expectedRes) {
if (!Array.isArray(expectedRes)) {
expectedRes = Array(args.length).fill(expectedRes);
}
setClass(e, attributeValue);
for (var i = 0; i < args.length; i++) {
test(function() {
assert_equals(e.classList.contains(args[i]), expectedRes[i],
"classList.contains(\"" + args[i] + "\")");
}, "classList.contains(" + format_value(args[i]) + ") when set to " +
format_value(attributeValue) + desc);
}
}
checkContains(null, ["a", "", " "], false);
checkContains("", ["a"], false);
checkContains("a", ["a"], true);
checkContains("a", ["aa", "b", "A", "a.", "a)",, "a'", 'a"', "a$", "a~",
"a?", "a\\"], false);
// All "ASCII whitespace" per spec, before and after
checkContains("a", ["a\t", "\ta", "a\n", "\na", "a\f", "\fa", "a\r", "\ra",
"a ", " a"], false);
checkContains("aa AA", ["aa", "AA", "aA"], [true, true, false]);
checkContains("a a a", ["a", "aa", "b"], [true, false, false]);
checkContains("a b c", ["a", "b"], true);
checkContains("null undefined", [null, undefined], true);
checkContains("\t\n\f\r a\t\n\f\r b\t\n\f\r ", ["a", "b"], true);
// add() method
function checkAdd(before, argument, after, param) {
var expectedException = undefined;
var noop = false;
if (param == "noop") {
noop = true;
} else {
expectedException = param;
}
checkModification(e, "add", argument, undefined, before, after,
expectedException, desc);
// Also check force toggle. The only difference is that it doesn't run the
// update steps for a no-op.
if (!Array.isArray(argument)) {
checkModification(e, "toggle", [argument, true], true, before,
noop ? before : after, expectedException, desc);
}
}
checkAdd(null, "", null, "SyntaxError");
checkAdd(null, ["a", ""], null, "SyntaxError");
checkAdd(null, " ", null, "InvalidCharacterError");
checkAdd(null, "\ta", null, "InvalidCharacterError");
checkAdd(null, "a\t", null, "InvalidCharacterError");
checkAdd(null, "\na", null, "InvalidCharacterError");
checkAdd(null, "a\n", null, "InvalidCharacterError");
checkAdd(null, "\fa", null, "InvalidCharacterError");
checkAdd(null, "a\f", null, "InvalidCharacterError");
checkAdd(null, "\ra", null, "InvalidCharacterError");
checkAdd(null, "a\r", null, "InvalidCharacterError");
checkAdd(null, " a", null, "InvalidCharacterError");
checkAdd(null, "a ", null, "InvalidCharacterError");
checkAdd(null, ["a", " "], null, "InvalidCharacterError");
checkAdd(null, ["a", "aa "], null, "InvalidCharacterError");
checkAdd("a", "a", "a");
checkAdd("aa", "AA", "aa AA");
checkAdd("a b c", "a", "a b c");
checkAdd("a a a b", "a", "a b", "noop");
checkAdd(null, "a", "a");
checkAdd("", "a", "a");
checkAdd(" ", "a", "a");
checkAdd(" \f", "a", "a");
checkAdd("a", "b", "a b");
checkAdd("a b c", "d", "a b c d");
checkAdd("a b c ", "d", "a b c d");
checkAdd(" a a b", "c", "a b c");
checkAdd(" a a b", "a", "a b", "noop");
checkAdd("\t\n\f\r a\t\n\f\r b\t\n\f\r ", "c", "a b c");
// multiple add
checkAdd("a b c ", ["d", "e"], "a b c d e");
checkAdd("a b c ", ["a", "a"], "a b c");
checkAdd("a b c ", ["d", "d"], "a b c d");
checkAdd("a b c a ", [], "a b c");
checkAdd(null, ["a", "b"], "a b");
checkAdd("", ["a", "b"], "a b");
checkAdd(null, null, "null");
checkAdd(null, undefined, "undefined");
// remove() method
function checkRemove(before, argument, after, param) {
var expectedException = undefined;
var noop = false;
if (param == "noop") {
noop = true;
} else {
expectedException = param;
}
checkModification(e, "remove", argument, undefined, before, after,
expectedException, desc);
// Also check force toggle. The only difference is that it doesn't run the
// update steps for a no-op.
if (!Array.isArray(argument)) {
checkModification(e, "toggle", [argument, false], false, before,
noop ? before : after, expectedException, desc);
}
}
checkRemove(null, "", null, "SyntaxError");
checkRemove(null, " ", null, "InvalidCharacterError");
checkRemove("\ta", "\ta", "\ta", "InvalidCharacterError");
checkRemove("a\t", "a\t", "a\t", "InvalidCharacterError");
checkRemove("\na", "\na", "\na", "InvalidCharacterError");
checkRemove("a\n", "a\n", "a\n", "InvalidCharacterError");
checkRemove("\fa", "\fa", "\fa", "InvalidCharacterError");
checkRemove("a\f", "a\f", "a\f", "InvalidCharacterError");
checkRemove("\ra", "\ra", "\ra", "InvalidCharacterError");
checkRemove("a\r", "a\r", "a\r", "InvalidCharacterError");
checkRemove(" a", " a", " a", "InvalidCharacterError");
checkRemove("a ", "a ", "a ", "InvalidCharacterError");
checkRemove("aa ", "aa ", null, "InvalidCharacterError");
checkRemove(null, "a", null);
checkRemove("", "a", "");
checkRemove("a b c", "d", "a b c", "noop");
checkRemove("a b c", "A", "a b c", "noop");
checkRemove(" a a a ", "a", "");
checkRemove("a b", "a", "b");
checkRemove("a b ", "a", "b");
checkRemove("a a b", "a", "b");
checkRemove("aa aa bb", "aa", "bb");
checkRemove("a a b a a c a a", "a", "b c");
checkRemove("a b c", "b", "a c");
checkRemove("aaa bbb ccc", "bbb", "aaa ccc");
checkRemove(" a b c ", "b", "a c");
checkRemove("a b b b c", "b", "a c");
checkRemove("a b c", "c", "a b");
checkRemove(" a b c ", "c", "a b");
checkRemove("a b c c c", "c", "a b");
checkRemove("a b a c a d a", "a", "b c d");
checkRemove("AA BB aa CC AA dd aa", "AA", "BB aa CC dd");
checkRemove("\ra\na\ta\f", "a", "");
checkRemove("\t\n\f\r a\t\n\f\r b\t\n\f\r ", "a", "b");
// multiple remove
checkRemove("a b c ", ["d", "e"], "a b c");
checkRemove("a b c ", ["a", "b"], "c");
checkRemove("a b c ", ["a", "c"], "b");
checkRemove("a b c ", ["a", "a"], "b c");
checkRemove("a b c ", ["d", "d"], "a b c");
checkRemove("a b c ", [], "a b c");
checkRemove(null, ["a", "b"], null);
checkRemove("", ["a", "b"], "");
checkRemove("a a", [], "a");
checkRemove("null", null, "");
checkRemove("undefined", undefined, "");
// toggle() method
function checkToggle(before, argument, expectedRes, after, expectedException) {
checkModification(e, "toggle", argument, expectedRes, before, after,
expectedException, desc);
}
checkToggle(null, "", null, null, "SyntaxError");
checkToggle(null, "aa ", null, null, "InvalidCharacterError");
checkToggle(null, "a", true, "a");
checkToggle("", "a", true, "a");
checkToggle(" ", "a", true, "a");
checkToggle(" \f", "a", true, "a");
checkToggle("a", "b", true, "a b");
checkToggle("a", "A", true, "a A");
checkToggle("a b c", "d", true, "a b c d");
checkToggle(" a a b", "d", true, "a b d");
checkToggle("a", "a", false, "");
checkToggle(" a a a ", "a", false, "");
checkToggle(" A A A ", "a", true, "A a");
checkToggle(" a b c ", "b", false, "a c");
checkToggle(" a b c b b", "b", false, "a c");
checkToggle(" a b c ", "c", false, "a b");
checkToggle(" a b c ", "a", false, "b c");
checkToggle(" a a b", "b", false, "a");
checkToggle("\t\n\f\r a\t\n\f\r b\t\n\f\r ", "a", false, "b");
checkToggle("\t\n\f\r a\t\n\f\r b\t\n\f\r ", "c", true, "a b c");
checkToggle("null", null, false, "");
checkToggle("", null, true, "null");
checkToggle("undefined", undefined, false, "");
checkToggle("", undefined, true, "undefined");
// replace() method
function checkReplace(before, token, newToken, expectedRes, after, expectedException) {
checkModification(e, "replace", [token, newToken], expectedRes, before,
after, expectedException, desc);
}
checkReplace(null, "", "a", null, null, "SyntaxError");
checkReplace(null, "", " ", null, null, "SyntaxError");
checkReplace(null, " ", "a", null, null, "InvalidCharacterError");
checkReplace(null, "\ta", "b", null, null, "InvalidCharacterError");
checkReplace(null, "a\t", "b", null, null, "InvalidCharacterError");
checkReplace(null, "\na", "b", null, null, "InvalidCharacterError");
checkReplace(null, "a\n", "b", null, null, "InvalidCharacterError");
checkReplace(null, "\fa", "b", null, null, "InvalidCharacterError");
checkReplace(null, "a\f", "b", null, null, "InvalidCharacterError");
checkReplace(null, "\ra", "b", null, null, "InvalidCharacterError");
checkReplace(null, "a\r", "b", null, null, "InvalidCharacterError");
checkReplace(null, " a", "b", null, null, "InvalidCharacterError");
checkReplace(null, "a ", "b", null, null, "InvalidCharacterError");
checkReplace(null, "a", "", null, null, "SyntaxError");
checkReplace(null, " ", "", null, null, "SyntaxError");
checkReplace(null, "a", " ", null, null, "InvalidCharacterError");
checkReplace(null, "b", "\ta", null, null, "InvalidCharacterError");
checkReplace(null, "b", "a\t", null, null, "InvalidCharacterError");
checkReplace(null, "b", "\na", null, null, "InvalidCharacterError");
checkReplace(null, "b", "a\n", null, null, "InvalidCharacterError");
checkReplace(null, "b", "\fa", null, null, "InvalidCharacterError");
checkReplace(null, "b", "a\f", null, null, "InvalidCharacterError");
checkReplace(null, "b", "\ra", null, null, "InvalidCharacterError");
checkReplace(null, "b", "a\r", null, null, "InvalidCharacterError");
checkReplace(null, "b", " a", null, null, "InvalidCharacterError");
checkReplace(null, "b", "a ", null, null, "InvalidCharacterError");
checkReplace("a", "a", "a", true, "a");
checkReplace("a", "a", "b", true, "b");
checkReplace("a", "A", "b", false, "a");
checkReplace("a b", "b", "A", true, "a A");
checkReplace("a b", "c", "a", false, "a b");
checkReplace("a b c", "d", "e", false, "a b c");
checkReplace("a a a b", "a", "a", true, "a b");
checkReplace("a a a b", "c", "d", false, "a a a b");
checkReplace(null, "a", "b", false, null);
checkReplace("", "a", "b", false, "");
checkReplace(" ", "a", "b", false, " ");
checkReplace(" a \f", "a", "b", true, "b");
checkReplace("a b c", "b", "d", true, "a d c");
checkReplace("a b c", "c", "a", true, "a b");
checkReplace("c b a", "c", "a", true, "a b");
checkReplace("a b a", "a", "c", true, "c b");
checkReplace("a b a", "b", "c", true, "a c");
checkReplace(" a a b", "a", "c", true, "c b");
checkReplace(" a a b", "b", "c", true, "a c");
checkReplace("\t\n\f\r a\t\n\f\r b\t\n\f\r ", "a", "c", true, "c b");
checkReplace("\t\n\f\r a\t\n\f\r b\t\n\f\r ", "b", "c", true, "a c");
checkReplace("a null", null, "b", true, "a b");
checkReplace("a b", "a", null, true, "null b");
checkReplace("a undefined", undefined, "b", true, "a b");
checkReplace("a b", "a", undefined, true, "undefined b");
}
var content = document.getElementById("content");
var htmlNode = document.createElement("div");
content.appendChild(htmlNode);
testClassList(htmlNode, " (HTML node)");
var xhtmlNode = document.createElementNS(XHTML_NS, "div");
content.appendChild(xhtmlNode);
testClassList(xhtmlNode, " (XHTML node)");
var mathMLNode = document.createElementNS(MATHML_NS, "math");
content.appendChild(mathMLNode);
testClassList(mathMLNode, " (MathML node)");
var xmlNode = document.createElementNS(null, "foo");
content.appendChild(xmlNode);
testClassList(xmlNode, " (XML node with null namespace)");
var fooNode = document.createElementNS("http://example.org/foo", "foo");
content.appendChild(fooNode);
testClassList(fooNode, " (foo node)");
</script>