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function testAttribute(attr, val, shouldRun) {
test(function() {
assert_false(window.ran, "ran variable not reset");
let script;
if (document.contentType === 'image/svg+xml') {
// SVG
script = document.createElementNS("http://www.w3.org/2000/svg", "script");
} else {
// HTML or XHTML
script = document.createElement("script");
}
script.setAttribute(attr, val);
script.textContent = "window.ran = true;";
document.querySelector('#script-placeholder').appendChild(script);
assert_equals(window.ran, shouldRun);
}, "Script should" + (shouldRun ? "" : "n't") + " run with " + attr + "=" +
format_value(val));
window.ran = false;
}
function testTypeShouldRun(type) {
testAttribute("type", type, true);
}
function testLanguageShouldRun(lang) {
testAttribute("language", lang, true);
}
function testTypeShouldNotRun(type) {
testAttribute("type", type, false);
}
function testLanguageShouldNotRunUnlessSVG(lang) {
// In SVGs, there is no concrete spec but all browsers agree that
// language attributes have no effects and thus script elements
// without type attributes are always expected to run regardless of
// language attributes.
const expectedToRun = document.contentType === 'image/svg+xml';
testAttribute("language", lang, expectedToRun);
}
// Unlike `test*()` methods above, there should be a (parser-inserted) script
// with an invalid type/language that would set `window.ran` to true just
// before `testParserInsertedDidNotRun()`, and
// `testParserInsertedDidNotRun()` asserts that the script did not run.
// `window.ran` should be reset where needed. For example:
// <script>window.ran = false;</script>
// <script type="invalid-type">window.ran = true;</script>
// <script>testParserInsertedDidNotRun('type=invalid-type');</script>
function testParserInsertedDidNotRun(description) {
test(() => assert_false(window.ran),
"Script shouldn't run with " + description + " (parser-inserted)");
window.ran = false;
}
// When prefixed by "application/", these match with
// https://mimesniff.spec.whatwg.org/#javascript-mime-type
const application = [
"ecmascript",
"javascript",
"x-ecmascript",
"x-javascript"
];
// When prefixed by "text/", these match with
// https://mimesniff.spec.whatwg.org/#javascript-mime-type
const text = [
"ecmascript",
"javascript",
"javascript1.0",
"javascript1.1",
"javascript1.2",
"javascript1.3",
"javascript1.4",
"javascript1.5",
"jscript",
"livescript",
"x-ecmascript",
"x-javascript"
];
const legacyTypes = [
"javascript1.6",
"javascript1.7",
"javascript1.8",
"javascript1.9"
];
const spaces = [" ", "\t", "\n", "\r", "\f"];
window.ran = false;
// Type attribute
testTypeShouldRun("");
testTypeShouldNotRun(" ");
application.map(t => "application/" + t).forEach(testTypeShouldRun);
application.map(t => ("application/" + t).toUpperCase()).forEach(
testTypeShouldRun);
spaces.forEach(function(s) {
application.map(t => "application/" + t + s).forEach(testTypeShouldRun);
application.map(t => s + "application/" + t).forEach(testTypeShouldRun);
});
application.map(t => "application/" + t + "\0").forEach(testTypeShouldNotRun);
application.map(t => "application/" + t + "\0foo").forEach(
testTypeShouldNotRun);
text.map(t => "text/" + t).forEach(testTypeShouldRun);
text.map(t => ("text/" + t).toUpperCase()).forEach(testTypeShouldRun);
legacyTypes.map(t => "text/" + t).forEach(testTypeShouldNotRun);
spaces.forEach(function(s) {
text.map(t => "text/" + t + s).forEach(testTypeShouldRun);
text.map(t => s + "text/" + t).forEach(testTypeShouldRun);
});
text.map(t => "text/" + t + "\0").forEach(testTypeShouldNotRun);
text.map(t => "text/" + t + "\0foo").forEach(testTypeShouldNotRun);
text.forEach(testTypeShouldNotRun);
legacyTypes.forEach(testTypeShouldNotRun);
// Language attribute
testLanguageShouldRun("");
testLanguageShouldNotRunUnlessSVG(" ");
text.forEach(testLanguageShouldRun);
text.map(t => t.toUpperCase()).forEach(testLanguageShouldRun);
legacyTypes.forEach(testLanguageShouldNotRunUnlessSVG);
spaces.forEach(function(s) {
text.map(t => t + s).forEach(testLanguageShouldNotRunUnlessSVG);
text.map(t => s + t).forEach(testLanguageShouldNotRunUnlessSVG);
});
text.map(t => t + "xyz").forEach(testLanguageShouldNotRunUnlessSVG);
text.map(t => "xyz" + t).forEach(testLanguageShouldNotRunUnlessSVG);
text.map(t => t + "\0").forEach(testLanguageShouldNotRunUnlessSVG);
text.map(t => t + "\0foo").forEach(testLanguageShouldNotRunUnlessSVG);
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