Adapt jest and eslint for new default loader scope. (#1077)

Revert webpack prod config comments to not refer to dev server.

packages/eslint-config-react-app/index.js

@@ -43,8 +43,7 @@ module.exports = {
 
   settings: {
     'import/ignore': [
-      'node_modules',
-      '\\.(json|css|ico|jpg|jpeg|png|gif|eot|otf|webp|svg|ttf|woff|woff2|mp4|webm|wav|mp3|m4a|aac|oga)$',
+      'node_modules'
     ],
     'import/extensions': ['.js'],
     'import/resolver': {

packages/react-scripts/config/webpack.config.dev.js

@@ -124,7 +124,7 @@ module.exports = {
       // A missing `test` is equivalent to a match.
       {
         exclude: [
-          /\.(html)$/,
+          /\.html$/,
           /\.(js|jsx)$/,
           /\.css$/,
           /\.json$/

packages/react-scripts/config/webpack.config.prod.js

@@ -124,15 +124,13 @@ module.exports = {
       // we need to add the supported extension to this loader too.
       // Add one new line in `exclude` for each loader.
       //
-      // "file" loader makes sure those assets get served by WebpackDevServer.
-      // When you `import` an asset, you get its (virtual) filename.
-      // In production, they would get copied to the `build` folder.
-      // "url" loader works like "file" loader except that it embeds assets
-      // smaller than specified limit in bytes as data URLs to avoid requests.
-      // A missing `test` is equivalent to a match.
+      // "file" loader makes sure those assets end up in the `build` folder.
+      // When you `import` an asset, you get its filename.
+      // "url" loader works just like "file" loader but it also embeds
+      // assets smaller than specified size as data URLs to avoid requests.
       {
         exclude: [
-          /\.(html)$/,
+          /\.html$/,
           /\.(js|jsx)$/,
           /\.css$/,
           /\.json$/

packages/react-scripts/utils/createJestConfig.js

@@ -20,7 +20,7 @@ module.exports = (resolve, rootDir, isEjecting) => {
   const config = {
     collectCoverageFrom: ['src/**/*.{js,jsx}'],
     moduleNameMapper: {
-      '^.+\\.(ico|jpg|jpeg|png|gif|eot|otf|webp|svg|ttf|woff|woff2|mp4|webm|wav|mp3|m4a|aac|oga)$': resolve('config/jest/FileStub.js'),
+      '^.+\\.(?!(js|jsx|css|json)$)[^\\.]+$': resolve('config/jest/FileStub.js'),
       '^.+\\.css$': resolve('config/jest/CSSStub.js')
     },
     setupFiles: [resolve('config/polyfills.js')],