Add QUnitAdapter

lib/ember-qunit.js

@@ -1,12 +1,14 @@
 import moduleFor            from 'ember-qunit/module-for';
 import moduleForComponent   from 'ember-qunit/module-for-component';
 import moduleForModel       from 'ember-qunit/module-for-model';
+import QUnitAdapter         from 'ember-qunit/adapter';
 import { setResolver }      from 'ember-test-helpers';
 export { test, skip, only } from 'qunit';
 
 export {
   moduleFor,
   moduleForComponent,
   moduleForModel,
-  setResolver
+  setResolver,
+  QUnitAdapter
 };

lib/ember-qunit/adapter.js

@@ -0,0 +1,20 @@
+import Ember from 'ember';
+import QUnit from 'qunit';
+
+export default Ember.Test.Adapter.extend({
+  init() {
+    this.doneCallbacks = [];
+  },
+
+  asyncStart() {
+    this.doneCallbacks.push(QUnit.config.current.assert.async());
+  },
+
+  asyncEnd() {
+    this.doneCallbacks.pop()();
+  },
+
+  exception(error) {
+    QUnit.config.current.assert.ok(false, Ember.inspect(error));
+  }
+});

tests/adapter-test.js

@@ -0,0 +1,29 @@
+/* global setTimeout */
+
+import { module, test } from 'qunit';
+import { QUnitAdapter } from 'ember-qunit';
+
+module('QUnitAdapter');
+
+test('asyncStart waits for asyncEnd to finish a test', function(assert) {
+  const adapter = QUnitAdapter.create();
+
+  adapter.asyncStart();
+  setTimeout(function() {
+    assert.ok(true);
+    adapter.asyncEnd();
+  }, 50);
+});
+
+test('asyncStart waits for equal numbers of asyncEnd to finish a test', function(assert) {
+  const adapter = QUnitAdapter.create();
+
+  adapter.asyncStart();
+  adapter.asyncStart();
+  adapter.asyncEnd();
+
+  setTimeout(function() {
+    assert.ok(true);
+    adapter.asyncEnd();
+  }, 50);
+});