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// META: global=window,worker
// META: title=Response: error static method
test(function() {
var responseError = Response.error();
assert_equals(responseError.type, "error", "Network error response's type is error");
assert_equals(responseError.status, 0, "Network error response's status is 0");
assert_equals(responseError.statusText, "", "Network error response's statusText is empty");
assert_equals(responseError.body, null, "Network error response's body is null");
assert_true(responseError.headers.entries().next().done, "Headers should be empty");
}, "Check response returned by static method error()");
test(function() {
const headers = Response.error().headers;
// Avoid false positives if expected API is not available
assert_true(!!headers);
assert_equals(typeof headers.append, 'function');
assert_throws_js(TypeError, function () { headers.append('name', 'value'); });
}, "the 'guard' of the Headers instance should be immutable");
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