happypack/lib/__tests__/WebpackUtils.test.js

webpack speed booster, makes you happy!

'use strict';

const Subject = require('../WebpackUtils');
const webpack = require('webpack');
const { assert } = require('chai');
const TestUtils = require('../HappyTestUtils');

describe('WebpackUtils', function() {
  describe('.resolveLoaders', function() {
    let compiler;
    let fakeLoader;

    beforeEach(function() {
      fakeLoader = TestUtils.createFile('node_modules/babel-loader/index.js', '');
    });

    it('resolves the full path of a loader', function(done) {
      runWithLoaders([{ test: /.js$/, loader: 'babel' }], function(err, loaders) {
        if (err) return done(err);

        assert.equal(loaders.length, 1);
        assert.equal(loaders[0].path, fakeLoader.getPath());

        done();
      });
    });

    it('resolves the full path and query of a loader', function(done) {
      runWithLoaders([{ test: /.js$/, loader: 'babel?presets[]=es2015' }], function(err, loaders) {
        if (err) return done(err);

        assert.equal(loaders.length, 1);
        assert.equal(loaders[0].path, fakeLoader.getPath());
        assert.equal(loaders[0].query, '?presets[]=es2015');

        done();
      });
    });

    function runWithLoaders(loaders, done) {
      compiler = webpack({
        module: {
          loaders: loaders
        },

        resolveLoader: {
          fallback: TestUtils.tempDir('node_modules/'),
        }
      });

      Subject.resolveLoaders(compiler, compiler.options.module.loaders.map(l => l.loader), done);
    }
  });
});