<!DOCTYPE html>
<html>
<head>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<meta http-equiv="Content-Security-Policy" content="require-trusted-types-for 'script'">
</head>
<body>
<script>
// This policy allows document.write to work as that's not relevant to what's actually being tested here.
trustedTypes.createPolicy('default', {createHTML: s => s});
promise_test(t => {
document.write(`<script>window.postMessage("first script element executed", "*");`);
var manipulator = _ => {
let script = document.body.getElementsByTagName("script")[1];
if (script) {
script.appendChild(document.createTextNode('/*byapi*/'));
document.write('<\/script><script>window.parent.postMessage("second script element executed", "*");<\/script>');
} else {
t.step_timeout(manipulator, 50);
}
}
manipulator();
// Now we'll wait for the postMessages to arrive. We expect the iframe's
// first message to be blocked by Trusted Types, since the manipulator
// above should have manipulated it (while loading). The second one should
// pass.
return new Promise((resolve, reject) => {
window.addEventListener("message", e => {
if (e.data.includes("first")) {
reject("First message should have been blocked: " + e.data);
} else if (e.data.includes("second")) {
resolve();
} else {
reject("Unknown message: " + e.data);
}
});
});
}, "Test TT application when manipulating <script> elements during loading.");
// Test that a script set via textContent or innerTest actually executes
// (and not only doesn't throw an exception, which it wouldn't do due to the
// "internal slot" mechanism).
const policy = trustedTypes.createPolicy("testpolicy", {
createScript: x => x, createScriptURL: x => x});
promise_test(t => {
const s = document.createElement("script");
document.body.appendChild(s);
s.textContent = policy.createScript("window.postMessage('hello');");
return new Promise(resolve => {
window.addEventListener("message", e => {
if (e.data == "hello") resolve();
});
});
}, "Script set via .textContent executes on a connected HTMLScriptElement.");
promise_test(t => {
const s = document.createElement("script");
s.textContent = policy.createScript("window.postMessage('world');");
document.body.appendChild(s);
return new Promise(resolve => {
window.addEventListener("message", e => {
if (e.data == "world") resolve();
});
});
}, "Script set via .textContent executes on an unconnected HTMLScriptElement.");
promise_test(t => {
const s = document.createElement("script");
document.body.appendChild(s);
s.innerText = policy.createScript("window.postMessage('hello');");
return new Promise(resolve => {
window.addEventListener("message", e => {
if (e.data == "hello") resolve();
});
});
}, "Script set via .innerText executes on a connected HTMLScriptElement.");
promise_test(t => {
const s = document.createElement("script");
s.innerText= policy.createScript("window.postMessage('world');");
document.body.appendChild(s);
return new Promise(resolve => {
window.addEventListener("message", e => {
if (e.data == "world") resolve();
});
});
}, "Script set via .innerText executes on an unconnected HTMLScriptElement.");
// Test that interactions between the script content, the .src attribute, and
// exceptions still work correctly with TT and the "internal slot" thingy.
promise_test(t => {
const s = document.createElement("script");
s.textContent = policy.createScript("window.postMessage('script body');");
try {
s.src = "support/HTMLScriptElement-internal-slot-support.js";
} catch (e) {}
document.body.appendChild(s);
return new Promise((resolve, reject) => {
window.addEventListener("message", e => {
// .src was set with plain string => should not have been accepted.
if (e.data == "script body") resolve();
if (e.data == "script url") reject();
});
});
}, "Setting .src to a plain string should throw an exception and not modify the script state, on an unconnected script element.");
promise_test(t => {
const s = document.createElement("script");
s.textContent = policy.createScript("window.postMessage('script body');");
s.src = policy.createScriptURL("support/HTMLScriptElement-internal-slot-support.js");
document.body.appendChild(s);
return new Promise((resolve, reject) => {
window.addEventListener("message", e => {
// .src was set with a TrustedScriptURL => the .src should get executed.
if (e.data == "script body") reject();
if (e.data == "script url") resolve();
});
});
}, "Setting .src to a TrustedScriptURL should work and should execute the referenced script instead of the script body, on an unconnected script element.");
promise_test(t => {
const s = document.createElement("script");
document.body.appendChild(s);
s.textContent = policy.createScript("window.postMessage('script body');");
try {
s.src = "support/HTMLScriptElement-internal-slot-support.js";
} catch (e) {}
return new Promise((resolve, reject) => {
window.addEventListener("message", e => {
// .src was set with plain string => should not have been accepted.
if (e.data == "script body") resolve();
if (e.data == "script url") reject();
});
});
}, "Setting .src to a plain string should throw an exception and not modify the script state, on a connected script element.");
promise_test(t => {
const s = document.createElement("script");
s.textContent = policy.createScript("window.postMessage('script body');");
s.src = policy.createScriptURL("support/HTMLScriptElement-internal-slot-support.js");
document.body.appendChild(s);
return new Promise((resolve, reject) => {
window.addEventListener("message", e => {
// .src was set with a TrustedScriptURL => the .src should get executed.
if (e.data == "script body") reject();
if (e.data == "script url") resolve();
});
});
}, "Setting .src to a TrustedScriptURL should work and should execute the referenced script instead of the script body, on a onnected script element.");
</script>
</body>
</html>
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