fix(build): Exclude test files

Re #99

Author: Volker Rose

lib/build.js

@@ -4,6 +4,8 @@ var conf = require("./config");
 var webpack = require("webpack");
 var merge = require("webpack-merge");
 
+const testFilePattern = "\\.(test|spec)\\.?";
+
 // custom babel target for each node version
 function getBabelTarget(envConfig) {
   var key = "AWS_LAMBDA_JS_RUNTIME";
@@ -70,7 +72,9 @@ function webpackConfig(dir, additionalConfig) {
       rules: [
         {
           test: /\.(m?js|ts)?$/,
-          exclude: /(node_modules|bower_components)/,
+          exclude: new RegExp(
+            `(node_modules|bower_components|${testFilePattern})`
+          ),
           use: {
             loader: "babel-loader",
             options: babelOpts
@@ -95,7 +99,9 @@ function webpackConfig(dir, additionalConfig) {
   fs.readdirSync(dirPath).forEach(function(file) {
     if (file.match(/\.(m?js|ts)$/)) {
       var name = file.replace(/\.(m?js|ts)$/, "");
-      webpackConfig.entry[name] = "./" + file;
+      if (!name.match(new RegExp(testFilePattern))) {
+        webpackConfig.entry[name] = "./" + file;
+      }
     }
   });
   if (Object.keys(webpackConfig.entry) < 1) {