add basic test app

files/babel.config.cjs

@@ -0,0 +1,32 @@
+const { buildMacros } = require('@embroider/macros/babel');
+
+const macros = buildMacros();
+
+module.exports = {
+  plugins: [<% if (typescript) { %>
+    ['@babel/plugin-transform-typescript', {
+      allowDeclareFields: true,
+      onlyRemoveTypeImports: true,
+      allowDeclareFields: true,
+    }],<% } %>
+    [
+      'babel-plugin-ember-template-compilation',
+      {
+        transforms: [...macros.templateMacros],
+      },
+    ],
+    [
+      'module:decorator-transforms',
+      {
+        runtime: {
+          import: require.resolve('decorator-transforms/runtime-esm'),
+        },
+      },
+    ],
+    ...macros.babelMacros,
+  ],
+
+  generatorOpts: {
+    compact: false,
+  },
+};

files/babel.publish.config.cjs

@@ -0,0 +1,31 @@
+module.exports = {
+  plugins: [<% if (typescript) { %>
+    [
+      '@babel/plugin-transform-typescript',
+      {
+        allExtensions: true,
+        onlyRemoveTypeImports: true,
+        allowDeclareFields: true,
+      },
+    ],<% } %>
+    [
+      'babel-plugin-ember-template-compilation',
+      {
+        targetFormat: 'hbs',
+        transforms: []
+      },
+    ],
+    [
+      'module:decorator-transforms',
+      {
+        runtime: {
+          import: 'decorator-transforms/runtime-esm',
+        },
+      },
+    ],
+  ],
+
+  generatorOpts: {
+    compact: false,
+  },
+};

files/package.json

@@ -24,8 +24,8 @@
     "lint:hbs:fix": "ember-template-lint . --fix --no-error-on-unmatched-pattern",
     "lint:js:fix": "eslint . --fix",<% if (typescript) { %>
     "lint:types": "glint",<% } %>
-    "start": "rollup --config --watch",
-    "test": "echo 'A v2 addon does not have tests, run tests in test-app'",
+    "start": "vite dev",
+    "test": "vite build --mode=development && testem --file testem.js ci",
     "prepack": "rollup --config"
   },
   "dependencies": {
@@ -36,12 +36,15 @@
     "ember-source": ">= 4.12.0"
   },
   "devDependencies": {
-    "@babel/core": "^7.25.2",
-    <% if (typescript) { %>"@babel/plugin-transform-typescript": "^7.25.2",<% } %>
+    "@babel/core": "^7.25.2",<% if (typescript) { %>"@babel/plugin-transform-typescript": "^7.25.2",<% } %>
     "@babel/eslint-parser": "^7.25.1",
     "@babel/runtime": "^7.25.6",
-    "@eslint/js": "^9.17.0",
-    "@embroider/addon-dev": "^7.1.0",<% if (typescript) { %>
+    "@embroider/addon-dev": "^7.1.0",
+    "@embroider/core": "^4.0.0-alpha.10",
+    "@embroider/macros": "^1.17.0-alpha.8",
+    "@embroider/vite": "^1.0.0-alpha.12",
+    "@ember/test-helpers": "^5.2.1",
+    "@eslint/js": "^9.17.0",<% if (typescript) { %>
     "@glint/core": "^1.4.0",
     "@glint/environment-ember-loose": "^1.4.0",
     "@glint/environment-ember-template-imports": "^1.4.0",
@@ -50,8 +53,10 @@
     "@rollup/plugin-babel": "^6.0.4",
     "babel-plugin-ember-template-compilation": "^2.2.5",
     "concurrently": "^9.0.1",
-    "ember-source": "^5.4.0",
+    "ember-source": "^6.3.0",
+    "ember-resolver": "^13.1.0",
     "ember-template-lint": "^6.0.0",
+    "ember-qunit": "^9.0.2",
     "eslint": "^9.17.0",
     "eslint-config-prettier": "^9.1.0",
     "eslint-plugin-ember": "^12.3.3",
@@ -61,7 +66,9 @@
     "prettier": "^3.4.2",
     "prettier-plugin-ember-template-tag": "^2.0.4",
     "rollup": "^4.22.5",
-    "rollup-plugin-copy": "^3.5.0"<% if (typescript) { %>,
+    "qunit": "^2.24.1",
+    "qunit-dom": "^3.4.0",
+    "vite": "^6.2.4"<% if (typescript) { %>,
     "typescript-eslint": "^8.19.1",
     "typescript": "~5.6.0"<% } %>
   },

files/rollup.config.mjs

@@ -1,5 +1,6 @@
 import { babel } from '@rollup/plugin-babel';
 import { Addon } from '@embroider/addon-dev/rollup';
+import { fileURLToPath } from 'node:url';
 
 const addon = new Addon({
   srcDir: 'src',
@@ -45,6 +46,10 @@ export default {
     babel({
       extensions: ['.js', '.gjs'<% if (typescript) { %>, '.ts', '.gts'<% } %>],
       babelHelpers: 'bundled',
+      configFile: resolve(
+        dirname(fileURLToPath(import.meta.url)),
+        './babel.publish.config.cjs',
+      ),
     }),
 
     // Ensure that standalone .hbs files are properly integrated as Javascript.

files/tests/index.html

@@ -0,0 +1,28 @@
+<!doctype html>
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <title><%= name %> Tests</title>
+    <meta name="description" content="" />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+  </head>
+  <body>
+    <div id="qunit"></div>
+    <div id="qunit-fixture">
+      <div id="ember-testing-container">
+        <div id="ember-testing"></div>
+      </div>
+    </div>
+
+    <script src="/testem.js" integrity="" data-embroider-ignore></script>
+    <script type="module">
+      import "ember-testing";
+    </script>
+
+    <script type="module">
+      import { start } from "./test-helper.js";
+      import.meta.glob("./**/*.{js,ts,gjs,gts}", { eager: true });
+      start();
+    </script>
+  </body>
+</html>

files/tests/test-helper.js

@@ -0,0 +1,35 @@
+import EmberApp from '@ember/application';
+import Resolver from 'ember-resolver';
+import EmberRouter from '@ember/routing/router';
+
+class Router extends EmberRouter {
+  location = 'none';
+  rootURL = '/';
+}
+
+class TestApp extends EmberApp {
+  modulePrefix = 'test-app';
+  Resolver = Resolver.withModules({
+    'test-app/router': { default: Router },
+    // add any custom services here
+  });
+}
+
+Router.map(function () {});
+
+import * as QUnit from 'qunit';
+import { setApplication } from '@ember/test-helpers';
+import { setup } from 'qunit-dom';
+import { start as qunitStart, setupEmberOnerrorValidation } from 'ember-qunit';
+
+export function start() {
+  setApplication(
+    TestApp.create({
+      autoboot: false,
+      rootElement: '#ember-testing',
+    }),
+  );
+  setup(QUnit.assert);
+  setupEmberOnerrorValidation();
+  qunitStart();
+}

files/vite.config.mjs

@@ -0,0 +1,20 @@
+import { defineConfig } from 'vite';
+import { extensions, ember, classicEmberSupport } from '@embroider/vite';
+import { babel } from '@rollup/plugin-babel';
+
+export default defineConfig({
+  plugins: [
+    ember(),
+    babel({
+      babelHelpers: 'inline',
+      extensions,
+    }),
+  ],
+  build: {
+    rollupOptions: {
+      input: {
+        tests: 'tests/index.html',
+      },
+    },
+  },
+});