Add a test for vite

Author: rbuckton

test/package.json

@@ -5,6 +5,7 @@
     "@rollup/plugin-node-resolve": "9.0.0",
     "webpack": "4.44.2",
     "webpack-cli": "3.3.12",
-    "snowpack": "2.12.1"
+    "snowpack": "2.12.1",
+    "vite": "2.8.0"
   }
 }

test/vite/index.js

@@ -0,0 +1,2 @@
+import { __awaiter } from "tslib";
+if (typeof __awaiter !== "function") throw new Error("Missing expected helper __awaiter");

test/vite/package.json

@@ -0,0 +1,5 @@
+{
+  "scripts": {
+    "test": "../node_modules/.bin/vite build && node build/index.js"
+  }
+}

test/vite/vite.config.js

@@ -0,0 +1,12 @@
+import { URL, fileURLToPath } from "url";
+export default {
+    build: {
+        outDir: "build",
+        emptyOutDir: true,
+        lib: {
+            entry: fileURLToPath(new URL("index.js", import.meta.url)),
+            formats: ["es"],
+            fileName: () => "index.js"
+        }
+    }
+};