client: replace deprecated vue-resource with axios, lint more file

test/client/unit/index.js

@@ -1,11 +1,11 @@
-// TODO verify if it's needed, added because Vuex require Promise in the global scope
+// TODO verify if it's needed, added because Axios require Promise in the global scope
 // and babel-runtime doesn't affect external libraries
 require('babel-polyfill');
 
 // require all test files (files that ends with .spec.js)
-var testsContext = require.context('./specs', true, /\.spec$/);
+let testsContext = require.context('./specs', true, /\.spec$/);
 testsContext.keys().forEach(testsContext);
 
 // require all .vue and .js files except main.js for coverage.
-var srcContext = require.context('../../../website/client', true, /^\.\/(?=(?!main(\.js)?$))(?=(.*\.(vue|js)$))/);
+let srcContext = require.context('../../../website/client', true, /^\.\/(?=(?!main(\.js)?$))(?=(.*\.(vue|js)$))/);
 srcContext.keys().forEach(srcContext);

test/client/unit/karma.conf.js

@@ -3,14 +3,15 @@
 // we are also using it with karma-webpack
 //   https://github.com/webpack/karma-webpack
 
-var path = require('path');
-var merge = require('webpack-merge');
-var baseConfig = require('../../../webpack/webpack.base.conf');
-var utils = require('../../../webpack/utils');
-var webpack = require('webpack');
-var projectRoot = path.resolve(__dirname, '../../../');
+const path = require('path');
+const merge = require('webpack-merge');
+const baseConfig = require('../../../webpack/webpack.base.conf');
+const utils = require('../../../webpack/utils');
+const webpack = require('webpack');
+const projectRoot = path.resolve(__dirname, '../../../');
+const testEnv = require('../../../webpack/config/test.env');
 
-var webpackConfig = merge(baseConfig, {
+const webpackConfig = merge(baseConfig, {
   // use inline sourcemap for karma-sourcemap-loader
   module: {
     loaders: utils.styleLoaders(),
@@ -23,7 +24,7 @@ var webpackConfig = merge(baseConfig, {
   },
   plugins: [
     new webpack.DefinePlugin({
-      'process.env': require('../../../webpack/config/test.env'),
+      'process.env': testEnv,
     }),
   ],
 });
@@ -43,7 +44,7 @@ webpackConfig.module.preLoaders.unshift({
 });
 
 // only apply babel for test files when using isparta
-webpackConfig.module.loaders.some(function (loader, i) {
+webpackConfig.module.loaders.some((loader) => {
   if (loader.loader === 'babel') {
     loader.include = path.resolve(projectRoot, 'test/client/unit');
     return true;