Fixed unit test and comment

Author: Frank Schmid

lib/wpwatch.js

@@ -45,7 +45,8 @@ module.exports = {
 
         process.env.SLS_DEBUG && this.serverless.cli.log(`Webpack watch invoke: HASH NEW=${stats.hash} CUR=${lastHash}`);
 
-        // If the file hash did not change there were no effective code changes detected (comment only changed do not change the compile hash!)
+        // If the file hash did not change there were no effective code changes detected
+        // (comment changes do not change the compile hash and do not account for a rebuild!)
         // See here: https://webpack.js.org/api/node/#watching (note below watching)
         if (stats && stats.hash === lastHash) {
           if (firstRun) {

tests/wpwatch.test.js

@@ -160,7 +160,7 @@ describe('wpwatch', function() {
     return expect(wpwatch()).to.be.fulfilled
     .then(() => BbPromise.delay(3000))
     .then(() => BbPromise.join(
-      expect(spawnStub).to.have.been.calledOnce,
+      expect(spawnStub).to.not.have.been.called,
       expect(webpackMock.compilerMock.watch).to.have.been.calledOnce,
       expect(watchCallbackSpy).to.have.been.calledTwice
     ));