get things working in node 4 again

package.json

@@ -45,13 +45,9 @@
     "babel": "^6.23.0",
     "babel-core": "^6.23.1",
     "babel-plugin-istanbul": "^4.1.4",
-    "babel-plugin-transform-es2015-arrow-functions": "^6.22.0",
-    "babel-plugin-transform-es2015-block-scoping": "^6.23.0",
-    "babel-plugin-transform-es2015-destructuring": "^6.23.0",
-    "babel-plugin-transform-es2015-modules-commonjs": "^6.23.0",
-    "babel-plugin-transform-es2015-parameters": "^6.23.0",
-    "babel-plugin-transform-es2015-spread": "^6.22.0",
-    "babel-preset-env": "^1.2.1",
+    "babel-plugin-transform-new-target": "^7.0.0-alpha.14",
+    "babel-polyfill": "^6.23.0",
+    "babel-preset-env": "^1.6.0",
     "babel-register": "^6.23.0",
     "chalk": "^2.0.1",
     "codecov": "^2.2.0",
@@ -91,13 +87,18 @@
     ]
   },
   "babel": {
+    "presets": [
+      [
+        "env",
+        {
+          "targets": {
+            "node": "current"
+          }
+        }
+      ]
+    ],
     "plugins": [
-      "transform-es2015-arrow-functions",
-      "transform-es2015-block-scoping",
-      "transform-es2015-spread",
-      "transform-es2015-parameters",
-      "transform-es2015-destructuring",
-      "transform-es2015-modules-commonjs"
+      "transform-new-target"
     ]
   }
 }

test/helpers.js

@@ -5,12 +5,6 @@ import fs from 'fs';
 import path from 'path';
 import chalk from 'chalk';
 
-import * as consoleGroup from 'console-group';
-consoleGroup.install();
-
-import * as sourceMapSupport from 'source-map-support';
-sourceMapSupport.install();
-
 // for coverage purposes, we need to test source files,
 // but for sanity purposes, we need to test dist files
 export function loadSvelte(test) {
@@ -150,7 +144,9 @@ export function loadConfig(file) {
 	try {
 		const resolved = require.resolve(file);
 		delete require.cache[resolved];
-		return require(resolved);
+
+		const config = require(resolved);
+		return config.default || config;
 	} catch (err) {
 		if (err.code === 'MODULE_NOT_FOUND') {
 			return {};

test/setup.js

@@ -2,14 +2,33 @@ const nodeVersionMatch = /^v(\d)/.exec(process.version);
 const legacy = +nodeVersionMatch[1] < 6;
 const babelrc = require("../package.json").babel;
 const fs = require('fs');
+const path = require('path');
+
+require('console-group').install();
+require('source-map-support').install();
 
 if (legacy) {
-	require("babel-register")(babelrc);
+	require("babel-polyfill");
+	require("babel-register")(Object.assign(babelrc, {
+		ignore: function(filename) {
+			const relative = path.relative(process.cwd(), filename);
+
+			if (relative.startsWith('node_modules')) {
+				if (relative.startsWith('node_modules/jsdom')) return false;
+				if (relative.startsWith('node_modules/whatwg-url')) return false;
+				return true;
+			}
+
+			if (relative === 'compiler/svelte.js') return true;
+
+			return false;
+		}
+	}));
 } else {
 	require.extensions['.js'] = function(module, filename) {
 		const exports = [];
 
-		let code = fs.readFileSync(filename, 'utf-8')
+		var code = fs.readFileSync(filename, 'utf-8')
 			.replace(/^import (?:\* as )?(\w+) from ['"]([^'"]+)['"];?/gm, 'var $1 = require("$2");')
 			.replace(/^import {([^}]+)} from ['"](.+)['"];?/gm, 'var {$1} = require("$2");')
 			.replace(/^export default /gm, 'module.exports = ')
@@ -38,3 +57,4 @@ if (legacy) {
 		}
 	};
 }
+

yarn.lock

@@ -570,6 +570,10 @@ babel-plugin-transform-exponentiation-operator@^6.22.0:
     babel-plugin-syntax-exponentiation-operator "^6.8.0"
     babel-runtime "^6.22.0"
 
+babel-plugin-transform-new-target@^7.0.0-alpha.14:
+  version "7.0.0-alpha.17"
+  resolved "https://registry.yarnpkg.com/babel-plugin-transform-new-target/-/babel-plugin-transform-new-target-7.0.0-alpha.17.tgz#69e62b7bc60a43201af0cfec5a3fea142a399897"
+
 babel-plugin-transform-regenerator@^6.22.0:
   version "6.24.1"
   resolved "https://registry.yarnpkg.com/babel-plugin-transform-regenerator/-/babel-plugin-transform-regenerator-6.24.1.tgz#b8da305ad43c3c99b4848e4fe4037b770d23c418"
@@ -583,7 +587,15 @@ babel-plugin-transform-strict-mode@^6.24.1:
     babel-runtime "^6.22.0"
     babel-types "^6.24.1"
 
-babel-preset-env@^1.2.1:
+babel-polyfill@^6.23.0:
+  version "6.23.0"
+  resolved "https://registry.yarnpkg.com/babel-polyfill/-/babel-polyfill-6.23.0.tgz#8364ca62df8eafb830499f699177466c3b03499d"
+  dependencies:
+    babel-runtime "^6.22.0"
+    core-js "^2.4.0"
+    regenerator-runtime "^0.10.0"
+
+babel-preset-env@^1.6.0:
   version "1.6.0"
   resolved "https://registry.yarnpkg.com/babel-preset-env/-/babel-preset-env-1.6.0.tgz#2de1c782a780a0a5d605d199c957596da43c44e4"
   dependencies: