node/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.

require('../common');
const ArrayStream = require('../common/arraystream');
const repl = require('repl');
const assert = require('assert');

let accum = '';

const output = new ArrayStream();
output.write = (data) => accum += data.replace('\r', '');

const r = repl.start({
  prompt: '',
  input: new ArrayStream(),
  output,
  terminal: false,
  useColors: false,
  global: false
});

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

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