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<!DOCTYPE html>
<meta http-equiv="Content-Security-Policy" content="require-trusted-types-for 'script'">
<link rel="author" title="Daniel Vogelheim" href="mailto:vogelheim@chromium.org"></link>
<link rel="help" href="https://w3c.github.io/trusted-types/dist/spec/"></link>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<body>
<script>
// Tests that certain execCommand commands will observe Trusted Types if
// it's enforced.
const commands = [ "insertHTML", "paste" ];
const tt_commands = [ "insertHTML" ];
// A pass-through policy for testing.
const a_policy = trustedTypes.createPolicy("a policy", {"createHTML": x => x});
for (const command of commands) {
const requires_tt = tt_commands.includes(command);
// Test that execCommand with String throws, but only for commands that
// require TT.
if (requires_tt) {
test(t => {
assert_throws_js(TypeError, _ => document.execCommand(command, false, "<em>Hello World</em>"));
}, `Document.execCommand("${command}") throws.`);
} else {
test(t => {
document.execCommand(command, false, "<em>Hello World</em>");
}, `Document.execCommand("${command}") works as usual."`);
}
// Test that execCommand succeeds with a TrustedHTML argument.
test(t => {
document.execCommand(command, false, a_policy.createHTML("<em>Hello World</em>"));
}, `Document.execCommand("${command}") works with a TrustedHTML argument.`);
}
// Test that with a default policy, all comamnds will work again.
trustedTypes.createPolicy("default", {"createHTML": x => x});
for (const command of commands) {
test(t => {
document.execCommand(command, false, "<em>Hello World</em>");
}, `Document.execCommand("${command}") works as usual with a default policy.`);
}
</script>
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