test/parallel/test-repl-uncaught-exception-async.js

'use strict';

// This verifies that adding an `uncaughtException` listener in an REPL instance
// does not suppress errors in the whole application. Adding such listener
// should throw.

const common = require('../common');
const assert = require('assert');
const { startNewREPLServer } = require('../common/repl');

const { replServer, output } = startNewREPLServer({
  prompt: '',
  terminal: false,
  useColors: false,
  global: false,
});

replServer.write(
  'process.nextTick(() => {\n' +
  '  process.on("uncaughtException", () => console.log("Foo"));\n' +
  '  throw new TypeError("foobar");\n' +
  '});\n'
);
replServer.write(
  'setTimeout(() => {\n' +
  '  throw new RangeError("abc");\n' +
  '}, 1);console.log()\n'
);

setTimeout(common.mustCall(() => {
  replServer.close();
  const len = process.listenerCount('uncaughtException');
  process.removeAllListeners('uncaughtException');
  assert.strictEqual(len, 0);
  assert.match(output.accumulator, /ERR_INVALID_REPL_INPUT.*(?!Type)RangeError: abc/s);
}), 2);