command.showSuggestionAfterError.test.js

const { Command } = require('../');

function getSuggestion(program, arg) {
  let message = '';
  program
    .exitOverride()
    .configureOutput({
      writeErr: (str) => { message = str; }
    });

  try {
    program.parse([arg], { from: 'user' });
  } catch (err) {
  }

  const match = message.match(/Did you mean (one of )?(.*)\?/);
  return match ? match[2] : null;
};

test('when unknown command and showSuggestionAfterError() then show suggestion', () => {
  const program = new Command();
  program.showSuggestionAfterError();
  program.command('example');
  const suggestion = getSuggestion(program, 'exampel');
  expect(suggestion).toBe('example');
});

test('when unknown command and showSuggestionAfterError(false) then do not show suggestion', () => {
  const program = new Command();
  program.showSuggestionAfterError(false);
  program.command('example');
  const suggestion = getSuggestion(program, 'exampel');
  expect(suggestion).toBe(null);
});

test('when unknown option and showSuggestionAfterError() then show suggestion', () => {
  const program = new Command();
  program.showSuggestionAfterError();
  program.option('--example');
  const suggestion = getSuggestion(program, '--exampel');
  expect(suggestion).toBe('--example');
});

test('when unknown option and showSuggestionAfterError(false) then do not show suggestion', () => {
  const program = new Command();
  program.showSuggestionAfterError(false);
  program.option('--example');
  const suggestion = getSuggestion(program, '--exampel');
  expect(suggestion).toBe(null);
});