Tip to add `--name` option to jest with gulp

gulp-jest.js

'use strict';

var gulp = require('gulp');
var _ = require('lodash');
var jest = require('jest-cli');
var minimist = require('minimist');
var gulpCliOptions = minimist(process.argv.slice(2));

var config = require('./jest.config');

gulp.task('jest', 'Run Jest tests.', function (done) {
  // underscore (i.e. the no name argument) is the name of the gulp task
  var toAssign = _.omit(gulpCliOptions, '_');

  // name is not a jest CLI option, it corresponds to the _ arg of jest CLI (replaced by a regexp here)
  if (gulpCliOptions.name) {
    toAssign.testPathPattern = new RegExp(gulpCliOptions.name);
  }

  var cliOptions = _.assign({config: config}, toAssign);

  jest.runCLI(cliOptions, config.rootDir, function (success) {
    if (success) {
      done();
    } else {
      done(new Error('Tests failed'));
    }
  });
});