chore: updates for tests / linting process

* use prettier
* clean out unnecessary gulp packages
* update eslint
* update mocha
* use chai
* use yarn
* update package scripts

Author: dvlsg

.babelrc

@@ -1,9 +1,9 @@
 {
-    "presets": [
-        "es2015",
-        "stage-0"
-    ],
-    "plugins": [
-        "transform-runtime"
-    ]
+  "presets": [
+    "es2015",
+    "stage-0"
+  ],
+  "plugins": [
+    "transform-runtime"
+  ]
 }

.eslintrc

@@ -0,0 +1,9 @@
+{
+  "bracketSpacing": true,
+  "printWidth": 80,
+  "semi": false,
+  "singleQuote": true,
+  "tabWidth": 2,
+  "trailingComma": "all",
+  "useTabs": false 
+}

.prettierrc

@@ -1,108 +1,69 @@
-const babel      = require('gulp-babel');
-const del        = require('del');
-const eslint     = require('gulp-eslint');
-const gulp       = require('gulp');
-const mocha      = require('gulp-mocha');
-const plumber    = require('gulp-plumber');
-const rename     = require('gulp-rename');
-const sequence   = require('run-sequence');
-const uglify     = require('gulp-uglify');
-const webpack    = require('webpack-stream');
-const sourcemaps = require('gulp-sourcemaps');
+const babel = require('gulp-babel')
+const del = require('del')
+const gulp = require('gulp')
+const plumber = require('gulp-plumber')
+const rename = require('gulp-rename')
+const sequence = require('run-sequence')
+const uglify = require('gulp-uglify')
+const webpack = require('webpack-stream')
+const sourcemaps = require('gulp-sourcemaps')
 
-require('babel-register'); // for mocha tests
-
-const srcDir = './src';
-const srcGlob = `${srcDir}/*.js`;
-const srcEntry = `channel.js`;
-const distDir  = './dist';
-const distUmdDir = `${distDir}/umd`;
-const distCjsDir = `${distDir}/cjs`;
-const testDir = './test';
-const testGlob = `${testDir}/*.js`;
-const singleFilename = 'async-csp.js';
-const libraryName = 'async-csp';
+const srcDir = './src'
+const srcGlob = `${srcDir}/*.js`
+const srcEntry = `channel.js`
+const distDir = './dist'
+const distUmdDir = `${distDir}/umd`
+const distCjsDir = `${distDir}/cjs`
+const singleFilename = 'async-csp.js'
+const libraryName = 'async-csp'
 
 function transpileUmd(config) {
-    if (config === undefined) {
-        config = {
-            output: {
-                filename: singleFilename,
-                library: libraryName,
-                libraryTarget: 'umd'
-            },
-            module: {
-                loaders: [
-                    { test: /\.js$/, exclude: /node_modules/, loader: 'babel-loader' }
-                ]
-            }
-        };
+  if (config === undefined) {
+    config = {
+      output: {
+        filename: singleFilename,
+        library: libraryName,
+        libraryTarget: 'umd',
+      },
+      module: {
+        loaders: [
+          { test: /\.js$/, exclude: /node_modules/, loader: 'babel-loader' },
+        ],
+      },
     }
-    return webpack(config);
+  }
+  return webpack(config)
 }
 
-gulp.task('lint', () => {
-    return gulp.src([ srcGlob, testGlob, './gulpfile.js' ])
-        .pipe(eslint()) // config in .eslintrc
-        .pipe(eslint.format());
-});
-
-gulp.task('test', () => {
-    return gulp.src(testGlob)
-        .pipe(eslint())
-        .pipe(eslint.format())
-        .pipe(mocha({
-            reporter: 'spec'
-        }));
-});
-
 gulp.task('clean', done => {
-    return del([ distDir ], done);
-});
+  return del([distDir], done)
+})
 
 gulp.task('build:umd', () => {
-    return gulp.src(`${srcDir}/${srcEntry}`)
-        .pipe(transpileUmd())
-        .pipe(sourcemaps.init())
-        .pipe(gulp.dest(distUmdDir))
-        .pipe(uglify())
-        .pipe(rename({ suffix: '.min' }))
-        .pipe(sourcemaps.write('.'))
-        .pipe(gulp.dest(distUmdDir));
-});
+  return gulp
+    .src(`${srcDir}/${srcEntry}`)
+    .pipe(transpileUmd())
+    .pipe(sourcemaps.init())
+    .pipe(gulp.dest(distUmdDir))
+    .pipe(uglify())
+    .pipe(rename({ suffix: '.min' }))
+    .pipe(sourcemaps.write('.'))
+    .pipe(gulp.dest(distUmdDir))
+})
 
 gulp.task('build:cjs', () => {
-    return gulp.src(srcGlob)
-        .pipe(plumber())
-        .pipe(babel()) // config in .babelrc
-        .pipe(plumber.stop())
-        .pipe(gulp.dest(distCjsDir));
-});
-
-gulp.task('build', (done) => {
-    sequence(
-        [ 'build:cjs', 'build:umd' ],
-        done
-    );
-});
+  return gulp
+    .src(srcGlob)
+    .pipe(plumber())
+    .pipe(babel()) // config in .babelrc
+    .pipe(plumber.stop())
+    .pipe(gulp.dest(distCjsDir))
+})
 
-gulp.task('watch', () => {
-    gulp.watch(srcGlob, () => {
-        sequence(
-            'lint',
-            'build'
-        );
-    });
-    gulp.watch(testGlob, [ 'test' ]);
-});
+gulp.task('build', done => {
+  sequence(['build:cjs', 'build:umd'], done)
+})
 
 gulp.task('default', done => {
-    sequence(
-        'test',
-        'clean',
-        'lint',
-        'build',
-        'watch',
-        done
-    );
-});
+  sequence('test', 'clean', 'lint', 'build', 'watch', done)
+})

gulpfile.js

@@ -16,9 +16,10 @@
   "main": "dist/cjs/channel.js",
   "scripts": {
     "build": "gulp build",
-    "test": "gulp test",
-    "watch": "gulp watch",
-    "mocha:test": "mocha test --recursive"
+    "lint": "eslint src/**/*.js test/**/*.js *.js",
+    "test": "mocha \"./{,!(node_modules)/**/}*.spec.js\"",
+    "test:watch": "npm run test -- --watch",
+    "watch": "gulp watch"
   },
   "repository": {
     "type": "git",
@@ -38,17 +39,20 @@
     "babel-preset-es2015": "^6.6.0",
     "babel-preset-stage-0": "^6.5.0",
     "babel-register": "^6.7.2",
+    "chai": "^4.1.2",
     "del": "^1.2.0",
+    "eslint": "^4.10.0",
+    "eslint-config-prettier": "^2.7.0",
     "gulp": "^3.9.0",
     "gulp-babel": "^6.1.2",
-    "gulp-eslint": "^1.1.1",
-    "gulp-mocha": "^2.2.0",
     "gulp-plumber": "^1.1.0",
     "gulp-rename": "^1.2.2",
     "gulp-sourcemaps": "^1.6.0",
     "gulp-uglify": "^1.5.3",
     "in-publish": "2.0.0",
-    "mocha": "^2.4.5",
+    "mocha": "^4.0.1",
+    "prettier": "^1.7.4",
+    "prettier-eslint-cli": "^4.4.0",
     "run-sequence": "^1.1.5",
     "webpack-stream": "^3.1.0",
     "zana-assert": "^0.1.4"