nodejs/test/parallel/test-repl-options.js

// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.

// Flags: --pending-deprecation

'use strict';
const common = require('../common');
const ArrayStream = require('../common/arraystream');
const assert = require('assert');
const repl = require('repl');
const cp = require('child_process');

assert.strictEqual(repl.repl, undefined);
repl._builtinLibs; // eslint-disable-line no-unused-expressions

common.expectWarning({
  DeprecationWarning: {
    DEP0142:
      'repl._builtinLibs is deprecated. Check module.builtinModules instead',
    DEP0141: 'repl.inputStream and repl.outputStream are deprecated. ' +
             'Use repl.input and repl.output instead',
  }
});

// Create a dummy stream that does nothing
const stream = new ArrayStream();

// 1, mostly defaults
const r1 = repl.start({
  input: stream,
  output: stream,
  terminal: true
});

assert.strictEqual(r1.input, stream);
assert.strictEqual(r1.output, stream);
assert.strictEqual(r1.input, r1.inputStream);
assert.strictEqual(r1.output, r1.outputStream);
assert.strictEqual(r1.terminal, true);
assert.strictEqual(r1.useColors, false);
assert.strictEqual(r1.useGlobal, false);
assert.strictEqual(r1.ignoreUndefined, false);
assert.strictEqual(r1.replMode, repl.REPL_MODE_SLOPPY);
assert.strictEqual(r1.historySize, 30);

// 2
function writer() {}

function evaler() {}
const r2 = repl.start({
  input: stream,
  output: stream,
  terminal: false,
  useColors: true,
  useGlobal: true,
  ignoreUndefined: true,
  eval: evaler,
  writer: writer,
  replMode: repl.REPL_MODE_STRICT,
  historySize: 50
});
assert.strictEqual(r2.input, stream);
assert.strictEqual(r2.output, stream);
assert.strictEqual(r2.input, r2.inputStream);
assert.strictEqual(r2.output, r2.outputStream);
assert.strictEqual(r2.terminal, false);
assert.strictEqual(r2.useColors, true);
assert.strictEqual(r2.useGlobal, true);
assert.strictEqual(r2.ignoreUndefined, true);
assert.strictEqual(r2.writer, writer);
assert.strictEqual(r2.replMode, repl.REPL_MODE_STRICT);
assert.strictEqual(r2.historySize, 50);

// 3, breakEvalOnSigint and eval supplied together should cause a throw
const r3 = () => repl.start({
  breakEvalOnSigint: true,
  eval: true
});

assert.throws(r3, {
  code: 'ERR_INVALID_REPL_EVAL_CONFIG',
  name: 'TypeError',
  message: 'Cannot specify both "breakEvalOnSigint" and "eval" for REPL'
});

// 4, Verify that defaults are used when no arguments are provided
const r4 = repl.start();

assert.strictEqual(r4.getPrompt(), '> ');
assert.strictEqual(r4.input, process.stdin);
assert.strictEqual(r4.output, process.stdout);
assert.strictEqual(r4.terminal, !!r4.output.isTTY);
assert.strictEqual(r4.useColors, r4.terminal);
assert.strictEqual(r4.useGlobal, false);
assert.strictEqual(r4.ignoreUndefined, false);
assert.strictEqual(r4.replMode, repl.REPL_MODE_SLOPPY);
assert.strictEqual(r4.historySize, 30);
r4.close();

// Check the standalone REPL
{
  const child = cp.spawn(process.execPath, ['--interactive']);
  let output = '';

  child.stdout.setEncoding('utf8');
  child.stdout.on('data', (data) => {
    output += data;
  });

  child.on('exit', common.mustCall(() => {
    const results = output.replace(/^> /mg, '').split('\n').slice(2);
    assert.deepStrictEqual(results, ['undefined', '']);
  }));

  child.stdin.write(
    'assert.ok(util.inspect(repl.repl, {depth: -1}).includes("REPLServer"));\n'
  );
  child.stdin.write('.exit');
  child.stdin.end();
}