Guard existing ember-qunit < 5.0.0-beta.1 behavior.

index.js

@@ -7,32 +7,50 @@ const MergeTrees = require('broccoli-merge-trees');
 module.exports = {
   name: 'qunit-dom',
 
-  included() {
-    this._super.included.apply(this, arguments);
+  init() {
+    this._super.init.apply(this, arguments);
 
     const VersionChecker = require('ember-cli-version-checker');
     const checker = new VersionChecker(this.project);
+    this._supportOlderEmberQUnit = !checker.for('ember-qunit').gte('5.0.0-alpha.1');
+  },
+
+  included() {
+    this._super.included.apply(this, arguments);
 
-    if (!checker.for('ember-qunit').gte('5.0.0-alpha.1')) {
+    if (this._supportOlderEmberQUnit) {
       this.import('vendor/qunit-dom.js', { type: 'test' });
       this.import('vendor/overwrite-qunit-dom-root-element.js', { type: 'test' });
     }
   },
 
   treeForVendor(vendorTree) {
-    let qunitPluginTree = new Funnel(`${__dirname}/dist`, {
-      files: ['qunit-dom.js', 'qunit-dom.js.map'],
-    });
+    if (this._supportOlderEmberQUnit) {
+      let qunitPluginTree = new Funnel(`${__dirname}/dist`, {
+        files: ['qunit-dom.js', 'qunit-dom.js.map'],
+      });
 
-    return new MergeTrees([vendorTree, qunitPluginTree]);
+      return new MergeTrees([vendorTree, qunitPluginTree]);
+    }
   },
 
   treeForAddonTestSupport() {
-    return new Funnel(`${__dirname}/vendor`, {
-      files: ['dummy-module.js'],
-      getDestinationPath() {
-        return 'qunit-dom/index.js';
-      },
-    });
+    if (this._supportOlderEmberQUnit) {
+      return new Funnel(`${__dirname}/vendor`, {
+        files: ['dummy-module.js'],
+        getDestinationPath() {
+          return 'qunit-dom/index.js';
+        },
+      });
+    } else {
+      let scopedInputTree = new Funnel(`${__dirname}/dist/addon-test-support`, {
+        destDir: 'qunit-dom',
+      });
+
+      return this.preprocessJs(scopedInputTree, '/', this.name, {
+        annotation: `qunit-dom - treeForAddonTestSupport`,
+        registry: this.registry,
+      });
+    }
   },
 };

rollup.config.js

@@ -29,7 +29,7 @@ const esBundle = {
   plugins: [typescript(typescriptConfiguration)],
 
   output: {
-    file: 'dist/qunit-dom.es.js',
+    file: 'dist/addon-test-support/index.js',
     format: 'es',
     sourcemap: true,
   },