text: import test from 'ava';
  import configFile from './config-file.js';
  
  const absentFile = './abc';
  const expected = 'Configuration file not found: ' + absentFile;
  
  test('Reading an absent configuration file throws a helpful error', t => {
    t.throws(() => configFile.readConfig(absentFile), expected);
  });
  
  test('Writing contributors in an absent configuration file throws a helpful error', t => {
    t.throws(configFile.writeContributors(absentFile, []), expected);
  });
  