test: add && backport tests from webpack core

.babelrc

@@ -5,7 +5,7 @@
       {
         "useBuiltIns": true,
         "targets": {
-          "node": 4.3
+          "node": "4.3"
         },
         "exclude": [
           "transform-async-to-generator",

.eslintignore

@@ -1,3 +1,6 @@
+*.snap
 /node_modules
 /dist
 /examples/build
+/coverage/
+/__tests__/stubs

__tests__/.eslintrc

@@ -0,0 +1,8 @@
+{
+  "plugins": [
+    "jest"
+  ],
+  "env": {
+    "jest/globals": true
+  }
+}

__tests__/UglifyJsPlugin.test.js

@@ -0,0 +1,7 @@
+import UglifyJsPlugin from '../src/index';
+
+describe('UglifyJsPlugin', () => {
+  it('has apply function', () => {
+    expect(typeof new UglifyJsPlugin().apply).toBe('function');
+  });
+});

__tests__/__snapshots__/all-options.test.js.snap

@@ -0,0 +1,86 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`errors 1`] = `Array []`;
+
+exports[`main.js 1`] = `
+"webpackJsonp([ 0 ], [ function(module, exports) {
+    module.exports = function() {
+        console.log(7);
+    };
+} ], [ 0 ]);"
+`;
+
+exports[`manifest.js 1`] = `
+"!function(modules) {
+    function __webpack_require__(moduleId) {
+        if (installedModules[moduleId]) return installedModules[moduleId].exports;
+        var module = installedModules[moduleId] = {
+            i: moduleId,
+            l: !1,
+            exports: {}
+        };
+        return modules[moduleId].call(module.exports, module, module.exports, __webpack_require__), 
+        module.l = !0, module.exports;
+    }
+    var parentJsonpFunction = window.webpackJsonp;
+    window.webpackJsonp = function(chunkIds, moreModules, executeModules) {
+        for (var moduleId, chunkId, result, i = 0, resolves = []; i < chunkIds.length; i++) chunkId = chunkIds[i], 
+        installedChunks[chunkId] && resolves.push(installedChunks[chunkId][0]), installedChunks[chunkId] = 0;
+        for (moduleId in moreModules) Object.prototype.hasOwnProperty.call(moreModules, moduleId) && (modules[moduleId] = moreModules[moduleId]);
+        for (parentJsonpFunction && parentJsonpFunction(chunkIds, moreModules, executeModules); resolves.length; ) resolves.shift()();
+        if (executeModules) for (i = 0; i < executeModules.length; i++) result = __webpack_require__(__webpack_require__.s = executeModules[i]);
+        return result;
+    };
+    var installedModules = {}, installedChunks = {
+        1: 0
+    };
+    __webpack_require__.e = function(chunkId) {
+        function onScriptComplete() {
+            script.onerror = script.onload = null, clearTimeout(timeout);
+            var chunk = installedChunks[chunkId];
+            0 !== chunk && (chunk && chunk[1](new Error(\\"Loading chunk \\" + chunkId + \\" failed.\\")), 
+            installedChunks[chunkId] = void 0);
+        }
+        var installedChunkData = installedChunks[chunkId];
+        if (0 === installedChunkData) return new Promise(function(resolve) {
+            resolve();
+        });
+        if (installedChunkData) return installedChunkData[2];
+        var promise = new Promise(function(resolve, reject) {
+            installedChunkData = installedChunks[chunkId] = [ resolve, reject ];
+        });
+        installedChunkData[2] = promise;
+        var head = document.getElementsByTagName(\\"head\\")[0], script = document.createElement(\\"script\\");
+        script.type = \\"text/javascript\\", script.charset = \\"utf-8\\", script.async = !0, script.timeout = 12e4, 
+        __webpack_require__.nc && script.setAttribute(\\"nonce\\", __webpack_require__.nc), 
+        script.src = __webpack_require__.p + \\"\\" + chunkId + \\".js\\";
+        var timeout = setTimeout(onScriptComplete, 12e4);
+        return script.onerror = script.onload = onScriptComplete, head.appendChild(script), 
+        promise;
+    }, __webpack_require__.m = modules, __webpack_require__.c = installedModules, __webpack_require__.d = function(exports, name, getter) {
+        __webpack_require__.o(exports, name) || Object.defineProperty(exports, name, {
+            configurable: !1,
+            enumerable: !0,
+            get: getter
+        });
+    }, __webpack_require__.n = function(module) {
+        var getter = module && module.__esModule ? function() {
+            return module.default;
+        } : function() {
+            return module;
+        };
+        return __webpack_require__.d(getter, \\"a\\", getter), getter;
+    }, __webpack_require__.o = function(object, property) {
+        return Object.prototype.hasOwnProperty.call(object, property);
+    }, __webpack_require__.p = \\"\\", __webpack_require__.oe = function(err) {
+        throw console.error(err), err;
+    };
+}([]);"
+`;
+
+exports[`warnings 1`] = `
+Array [
+  "Error: main.js from UglifyJs
+Dropping unused variable a [./__tests__/stubs/entry.js:4,0]",
+]
+`;

__tests__/__snapshots__/empty-options.test.js.snap

@@ -0,0 +1,9 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`errors 1`] = `Array []`;
+
+exports[`main.js 1`] = `"webpackJsonp([0],[function(o,n){o.exports=function(){console.log(7)}}],[0]);"`;
+
+exports[`manifest.js 1`] = `"!function(e){function n(r){if(t[r])return t[r].exports;var o=t[r]={i:r,l:!1,exports:{}};return e[r].call(o.exports,o,o.exports,n),o.l=!0,o.exports}var r=window.webpackJsonp;window.webpackJsonp=function(t,c,u){for(var i,a,f,l=0,s=[];l<t.length;l++)a=t[l],o[a]&&s.push(o[a][0]),o[a]=0;for(i in c)Object.prototype.hasOwnProperty.call(c,i)&&(e[i]=c[i]);for(r&&r(t,c,u);s.length;)s.shift()();if(u)for(l=0;l<u.length;l++)f=n(n.s=u[l]);return f};var t={},o={1:0};n.e=function(e){function r(){i.onerror=i.onload=null,clearTimeout(a);var n=o[e];0!==n&&(n&&n[1](new Error(\\"Loading chunk \\"+e+\\" failed.\\")),o[e]=void 0)}var t=o[e];if(0===t)return new Promise(function(e){e()});if(t)return t[2];var c=new Promise(function(n,r){t=o[e]=[n,r]});t[2]=c;var u=document.getElementsByTagName(\\"head\\")[0],i=document.createElement(\\"script\\");i.type=\\"text/javascript\\",i.charset=\\"utf-8\\",i.async=!0,i.timeout=12e4,n.nc&&i.setAttribute(\\"nonce\\",n.nc),i.src=n.p+\\"\\"+e+\\".js\\";var a=setTimeout(r,12e4);return i.onerror=i.onload=r,u.appendChild(i),c},n.m=e,n.c=t,n.d=function(e,r,t){n.o(e,r)||Object.defineProperty(e,r,{configurable:!1,enumerable:!0,get:t})},n.n=function(e){var r=e&&e.__esModule?function(){return e.default}:function(){return e};return n.d(r,\\"a\\",r),r},n.o=function(e,n){return Object.prototype.hasOwnProperty.call(e,n)},n.p=\\"\\",n.oe=function(e){throw console.error(e),e}}([]);"`;
+
+exports[`warnings 1`] = `Array []`;

__tests__/__snapshots__/invalid-options.test.js.snap

@@ -0,0 +1,205 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`errors 1`] = `
+Array [
+  "Error: main.js from UglifyJs
+DefaultsError: \`invalid-option\` is not a supported option
+    node_modules/uglify-js/tools/node.js:27:1, <anonymous>:86:23
+    src/index.js:242:113
+    native
+    src/index.js:52:25
+    node_modules/tapable/lib/Tapable.js:142:13
+    node_modules/webpack/lib/Compilation.js:641:10
+    node_modules/tapable/lib/Tapable.js:131:46
+    node_modules/webpack/lib/Compilation.js:637:9
+    node_modules/tapable/lib/Tapable.js:131:46
+    node_modules/webpack/lib/Compilation.js:580:8",
+  "Error: manifest.js from UglifyJs
+DefaultsError: \`invalid-option\` is not a supported option
+    node_modules/uglify-js/tools/node.js:27:1, <anonymous>:86:23
+    src/index.js:242:113
+    native
+    src/index.js:52:25
+    node_modules/tapable/lib/Tapable.js:142:13
+    node_modules/webpack/lib/Compilation.js:641:10
+    node_modules/tapable/lib/Tapable.js:131:46
+    node_modules/webpack/lib/Compilation.js:637:9
+    node_modules/tapable/lib/Tapable.js:131:46
+    node_modules/webpack/lib/Compilation.js:580:8",
+]
+`;
+
+exports[`main.js 1`] = `
+"webpackJsonp([0],[
+/* 0 */
+/***/ (function(module, exports) {
+
+// foo
+/*@preserve*/
+// bar
+var a = 2 + 2;
+
+module.exports = function Foo() {
+	var b = 2 + 2;
+	console.log(b + 1 + 2);
+};
+
+
+/***/ })
+],[0]);"
+`;
+
+exports[`manifest.js 1`] = `
+"/******/ (function(modules) { // webpackBootstrap
+/******/ 	// install a JSONP callback for chunk loading
+/******/ 	var parentJsonpFunction = window[\\"webpackJsonp\\"];
+/******/ 	window[\\"webpackJsonp\\"] = function webpackJsonpCallback(chunkIds, moreModules, executeModules) {
+/******/ 		// add \\"moreModules\\" to the modules object,
+/******/ 		// then flag all \\"chunkIds\\" as loaded and fire callback
+/******/ 		var moduleId, chunkId, i = 0, resolves = [], result;
+/******/ 		for(;i < chunkIds.length; i++) {
+/******/ 			chunkId = chunkIds[i];
+/******/ 			if(installedChunks[chunkId]) {
+/******/ 				resolves.push(installedChunks[chunkId][0]);
+/******/ 			}
+/******/ 			installedChunks[chunkId] = 0;
+/******/ 		}
+/******/ 		for(moduleId in moreModules) {
+/******/ 			if(Object.prototype.hasOwnProperty.call(moreModules, moduleId)) {
+/******/ 				modules[moduleId] = moreModules[moduleId];
+/******/ 			}
+/******/ 		}
+/******/ 		if(parentJsonpFunction) parentJsonpFunction(chunkIds, moreModules, executeModules);
+/******/ 		while(resolves.length) {
+/******/ 			resolves.shift()();
+/******/ 		}
+/******/ 		if(executeModules) {
+/******/ 			for(i=0; i < executeModules.length; i++) {
+/******/ 				result = __webpack_require__(__webpack_require__.s = executeModules[i]);
+/******/ 			}
+/******/ 		}
+/******/ 		return result;
+/******/ 	};
+/******/
+/******/ 	// The module cache
+/******/ 	var installedModules = {};
+/******/
+/******/ 	// objects to store loaded and loading chunks
+/******/ 	var installedChunks = {
+/******/ 		1: 0
+/******/ 	};
+/******/
+/******/ 	// The require function
+/******/ 	function __webpack_require__(moduleId) {
+/******/
+/******/ 		// Check if module is in cache
+/******/ 		if(installedModules[moduleId]) {
+/******/ 			return installedModules[moduleId].exports;
+/******/ 		}
+/******/ 		// Create a new module (and put it into the cache)
+/******/ 		var module = installedModules[moduleId] = {
+/******/ 			i: moduleId,
+/******/ 			l: false,
+/******/ 			exports: {}
+/******/ 		};
+/******/
+/******/ 		// Execute the module function
+/******/ 		modules[moduleId].call(module.exports, module, module.exports, __webpack_require__);
+/******/
+/******/ 		// Flag the module as loaded
+/******/ 		module.l = true;
+/******/
+/******/ 		// Return the exports of the module
+/******/ 		return module.exports;
+/******/ 	}
+/******/
+/******/ 	// This file contains only the entry chunk.
+/******/ 	// The chunk loading function for additional chunks
+/******/ 	__webpack_require__.e = function requireEnsure(chunkId) {
+/******/ 		var installedChunkData = installedChunks[chunkId];
+/******/ 		if(installedChunkData === 0) {
+/******/ 			return new Promise(function(resolve) { resolve(); });
+/******/ 		}
+/******/
+/******/ 		// a Promise means \\"currently loading\\".
+/******/ 		if(installedChunkData) {
+/******/ 			return installedChunkData[2];
+/******/ 		}
+/******/
+/******/ 		// setup Promise in chunk cache
+/******/ 		var promise = new Promise(function(resolve, reject) {
+/******/ 			installedChunkData = installedChunks[chunkId] = [resolve, reject];
+/******/ 		});
+/******/ 		installedChunkData[2] = promise;
+/******/
+/******/ 		// start chunk loading
+/******/ 		var head = document.getElementsByTagName('head')[0];
+/******/ 		var script = document.createElement('script');
+/******/ 		script.type = 'text/javascript';
+/******/ 		script.charset = 'utf-8';
+/******/ 		script.async = true;
+/******/ 		script.timeout = 120000;
+/******/
+/******/ 		if (__webpack_require__.nc) {
+/******/ 			script.setAttribute(\\"nonce\\", __webpack_require__.nc);
+/******/ 		}
+/******/ 		script.src = __webpack_require__.p + \\"\\" + chunkId + \\".js\\";
+/******/ 		var timeout = setTimeout(onScriptComplete, 120000);
+/******/ 		script.onerror = script.onload = onScriptComplete;
+/******/ 		function onScriptComplete() {
+/******/ 			// avoid mem leaks in IE.
+/******/ 			script.onerror = script.onload = null;
+/******/ 			clearTimeout(timeout);
+/******/ 			var chunk = installedChunks[chunkId];
+/******/ 			if(chunk !== 0) {
+/******/ 				if(chunk) {
+/******/ 					chunk[1](new Error('Loading chunk ' + chunkId + ' failed.'));
+/******/ 				}
+/******/ 				installedChunks[chunkId] = undefined;
+/******/ 			}
+/******/ 		};
+/******/ 		head.appendChild(script);
+/******/
+/******/ 		return promise;
+/******/ 	};
+/******/
+/******/ 	// expose the modules object (__webpack_modules__)
+/******/ 	__webpack_require__.m = modules;
+/******/
+/******/ 	// expose the module cache
+/******/ 	__webpack_require__.c = installedModules;
+/******/
+/******/ 	// define getter function for harmony exports
+/******/ 	__webpack_require__.d = function(exports, name, getter) {
+/******/ 		if(!__webpack_require__.o(exports, name)) {
+/******/ 			Object.defineProperty(exports, name, {
+/******/ 				configurable: false,
+/******/ 				enumerable: true,
+/******/ 				get: getter
+/******/ 			});
+/******/ 		}
+/******/ 	};
+/******/
+/******/ 	// getDefaultExport function for compatibility with non-harmony modules
+/******/ 	__webpack_require__.n = function(module) {
+/******/ 		var getter = module && module.__esModule ?
+/******/ 			function getDefault() { return module['default']; } :
+/******/ 			function getModuleExports() { return module; };
+/******/ 		__webpack_require__.d(getter, 'a', getter);
+/******/ 		return getter;
+/******/ 	};
+/******/
+/******/ 	// Object.prototype.hasOwnProperty.call
+/******/ 	__webpack_require__.o = function(object, property) { return Object.prototype.hasOwnProperty.call(object, property); };
+/******/
+/******/ 	// __webpack_public_path__
+/******/ 	__webpack_require__.p = \\"\\";
+/******/
+/******/ 	// on error function for async loading
+/******/ 	__webpack_require__.oe = function(err) { console.error(err); throw err; };
+/******/ })
+/************************************************************************/
+/******/ ([]);"
+`;
+
+exports[`warnings 1`] = `Array []`;