// META: global=window,worker | |
// META: title=Response: error static method | |
promise_test (async () => { | |
const response = await fetch("../resources/data.json"); | |
assert_throws_js(TypeError, () => { response.headers.append("name", "value"); }); | |
assert_not_equals(response.headers.get("name"), "value", "response headers should be immutable"); | |
}, "Ensure response headers are immutable"); |