Add embroider test suite

.github/workflows/ci.yml

@@ -76,6 +76,8 @@ jobs:
           - ember-release
           - ember-beta
           - ember-canary
+          - embroider-safe
+          - embroider-optimized
 
     steps:
       - uses: actions/checkout@v2

config/ember-try.js

@@ -3,6 +3,7 @@
 /* eslint-env node */
 
 const getChannelURL = require('ember-source-channel-url');
+const { embroiderSafe, embroiderOptimized } = require('@embroider/test-setup');
 
 module.exports = function () {
   return Promise.all([
@@ -93,6 +94,8 @@ module.exports = function () {
             devDependencies: {},
           },
         },
+        embroiderSafe(),
+        embroiderOptimized(),
       ],
     };
   });

ember-cli-build.js

@@ -24,5 +24,6 @@ module.exports = function (defaults) {
     behave. You most likely want to be modifying `./index.js` or app's build file
   */
 
-  return app.toTree();
+  const { maybeEmbroider } = require('@embroider/test-setup');
+  return maybeEmbroider(app);
 };

package.json

@@ -33,6 +33,7 @@
     "@babel/core": "7.16.0",
     "@ember/optional-features": "2.0.0",
     "@ember/test-helpers": "2.6.0",
+    "@embroider/test-setup": "^0.37.0",
     "broccoli-stew": "3.0.0",
     "ember-auto-import": "2.2.4",
     "ember-cli": "3.28.4",