Function isError

test/parallel/test-diagnostics-channel-http.js:13–13

(error)

const isOutgoingMessage = (object) => object instanceof http.OutgoingMessage;
const isNetSocket = (socket) => socket instanceof net.Socket;
const isError = (error) => error instanceof Error;

dc.subscribe('http.client.request.start', common.mustCall(({ request }) => {
  assert.strictEqual(isOutgoingMessage(request), true);