node/test/parallel/test-repl-multiline.js

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

const input = ['const foo = {', '};', 'foo'];

function run({ useColors }) {
  const { replServer, output } = startNewREPLServer({ useColors });

  replServer.on('exit', common.mustCall(() => {
    const actual = output.accumulator.split('\n');

    // Validate the output, which contains terminal escape codes.
    assert.strictEqual(actual.length, 6);
    assert.ok(actual[0].endsWith(input[0]));
    assert.ok(actual[1].includes('| '));
    assert.ok(actual[1].endsWith(input[1]));
    assert.ok(actual[2].includes('undefined'));
    assert.ok(actual[3].endsWith(input[2]));
    assert.strictEqual(actual[4], '{}');
  }));

  input.forEach((line) => replServer.write(`${line}\n`));
  replServer.close();
}

run({ useColors: true });
run({ useColors: false });