feat(lib): Add support for watchOptions

Implemented as discussed at
https://webpack.github.io/docs/cli.html#additional-configuration-options
.

Closes #60.

Author: bebraw

src/index.js

@@ -9,6 +9,7 @@ import nodeSchema from './properties/node'
 import pluginsSchema from './properties/plugins'
 import resolveSchema from './properties/resolve'
 import outputSchema from './properties/output'
+import watchOptionsSchema from './properties/watchOptions'
 import { absolutePath } from './types'
 
 const schema = Joi.object({
@@ -34,6 +35,7 @@ const schema = Joi.object({
   resolveLoader: resolveSchema.concat(Joi.object({
     moduleTemplates: Joi.array().items(Joi.string()),
   })),
+  watchOptions: watchOptionsSchema,
   stats: Joi.any(), // TODO
   target: Joi.any(), // TODO
 

src/properties/watchOptions/index.js

@@ -0,0 +1,6 @@
+import Joi from 'joi'
+
+export default Joi.object({
+  aggregateTimeout: Joi.number(),
+  poll: [Joi.bool(), Joi.number()],
+})

src/properties/watchOptions/index.test.js

@@ -0,0 +1,18 @@
+import schema from './index'
+import { allValid } from '../../../test/utils'
+
+const validModuleConfigs = [
+  // #0
+  { aggregateTimeout: 300 },
+  // #1
+  { poll: true },
+  // #2
+  { poll: false },
+  // #3
+  { poll: 1000 },
+]
+
+describe('watchOptions', () => {
+  allValid(validModuleConfigs, schema)
+})
+

test/passing-configs/watch-options.js

@@ -0,0 +1,8 @@
+module.exports = {
+
+  watchOptions: {
+    aggregateTimeout: 300,
+    poll: true
+  }
+
+}

test/passing-configs/watch-options2.js

@@ -0,0 +1,8 @@
+module.exports = {
+
+  watchOptions: {
+    aggregateTimeout: 300,
+    poll: 1000
+  }
+
+}