Enable stats presets as string

- Inject Stats.presetToOptions to parse { stats: String } and gather options object.
- Write unit test.

Author: Oleg Andreyev

src/__tests__/webpackWorker.spec.js

@@ -4,21 +4,25 @@ const watch = jest.fn().mockReturnValue({ close });
 
 jest.setMock('webpack',  () => ({ run, watch })); // try to get rid of this.
 jest.mock('../watchModeIPC');
+jest.mock('webpack/lib/Stats');
 
 let webpackWorker;
 let promiseMock;
 let webpackMock;
+let webpackStatsMock;
 let notifyIPCWatchCompileDone;
 
 describe('webpackWorker', () => {
     beforeEach(() => {
         promiseMock = require('bluebird');
         webpackMock = require('webpack');
+        webpackStatsMock = require('webpack/lib/Stats');
         webpackWorker = require('../webpackWorker.js');
         notifyIPCWatchCompileDone = require('../watchModeIPC').notifyIPCWatchCompileDone;
         jest.doMock('testConfig', () => ({ webpack: 'config' }), { virtual: true });
         jest.resetModules();
         jest.clearAllMocks();
+        process.removeAllListeners();
     });
 
     describe('arguments', () => {
@@ -268,6 +272,28 @@ describe('webpackWorker', () => {
                 finishedCallback(null, statsObj);
                 expect(statsObj.toString.mock.calls).toMatchSnapshot();
             });
+
+            it('should translate stats string to object', () => {
+                jest.spyOn(console, 'log');
+                let presetToOptions = jest.spyOn(webpackStatsMock, 'presetToOptions');
+
+                const doneCallback = jest.fn();
+
+                webpackWorker('testConfig', {
+                    stats: true,
+                    modulesSort: 'name',
+                    chunksSort: 'size',
+                    assetsSort: 'name',
+                    exclude: ['file'],
+                    colors: true
+                }, 0, 1, doneCallback);
+
+                expect(promiseMock.resolve.mock.calls[0][0]).toEqual({ webpack: 'config' });
+                const thenCb = promiseMock.then.mock.calls[0][0];
+                thenCb({ webpack: 'config', name: 'testApp', 'stats': 'verbose' });
+
+                expect(presetToOptions).toHaveBeenCalled();
+            })
         });
     });
 

src/webpackWorker.js

@@ -1,7 +1,8 @@
 var Promise = require('bluebird'),
     chalk = require('chalk'),
     loadConfigurationFile = require('./loadConfigurationFile').default,
-    notifyIPCWatchCompileDone = require('./watchModeIPC').notifyIPCWatchCompileDone;
+    notifyIPCWatchCompileDone = require('./watchModeIPC').notifyIPCWatchCompileDone,
+    presetToOptions = require('webpack/lib/Stats').presetToOptions;
 /**
  * Choose the most correct version of webpack, prefer locally installed version,
  * fallback to the own dependency if there's none.
@@ -28,7 +29,12 @@ function getAppName(webpackConfig) {
 }
 
 function getOutputOptions(webpackConfig, options) {
-    var outputOptions = Object.create(webpackConfig.stats || {});
+    var stats = webpackConfig.stats;
+    // @see https://webpack.js.org/configuration/stats/
+    if (typeof stats === 'string') {
+        stats = presetToOptions(stats);
+    }
+    var outputOptions = Object.create(stats || {});
     if(typeof options.modulesSort !== 'undefined') {
         outputOptions.modulesSort = options.modulesSort;
     }