Expose Ember.ApplicationInstance.setupRegistry for tooling.

Glimmer requires that a number of factories and injections added by
`ApplicationInstance#setupRegistry` are present, but the testing harness
only has access to calling `Ember.Application.buildRegistry` which
leaves the registry in a partially populated state.

This exposes `Ember.ApplicationInstance.setupRegistry` so that
`ember-test-helpers` can ensure that its registry is properly populated.

packages/ember-application/lib/system/application-instance.js

@@ -131,21 +131,7 @@ const ApplicationInstance = EngineInstance.extend({
   },
 
   setupRegistry(options) {
-    let registry = this.__registry__;
-
-    registry.register('-environment:main', options.toEnvironment(), { instantiate: false });
-    registry.injection('view', '_environment', '-environment:main');
-    registry.injection('route', '_environment', '-environment:main');
-
-    registry.register('service:-document', options.document, { instantiate: false });
-
-    if (options.isInteractive) {
-      registry.injection('view', 'renderer', 'renderer:-dom');
-      registry.injection('component', 'renderer', 'renderer:-dom');
-    } else {
-      registry.injection('view', 'renderer', 'renderer:-inert');
-      registry.injection('component', 'renderer', 'renderer:-inert');
-    }
+    this.constructor.setupRegistry(this.__registry__, options);
   },
 
   router: computed(function() {
@@ -288,6 +274,30 @@ const ApplicationInstance = EngineInstance.extend({
   }
 });
 
+ApplicationInstance.reopenClass({
+  /**
+   @private
+   @method setupRegistry
+   @param {Registry} registry
+   @param {BootOptions} options
+  */
+  setupRegistry(registry, options = new BootOptions()) {
+    registry.register('-environment:main', options.toEnvironment(), { instantiate: false });
+    registry.injection('view', '_environment', '-environment:main');
+    registry.injection('route', '_environment', '-environment:main');
+
+    registry.register('service:-document', options.document, { instantiate: false });
+
+    if (options.isInteractive) {
+      registry.injection('view', 'renderer', 'renderer:-dom');
+      registry.injection('component', 'renderer', 'renderer:-dom');
+    } else {
+      registry.injection('view', 'renderer', 'renderer:-inert');
+      registry.injection('component', 'renderer', 'renderer:-inert');
+    }
+  }
+});
+
 /**
   A list of boot-time configuration options for customizing the behavior of
   an `Ember.ApplicationInstance`.

packages/ember-application/tests/system/application_instance_test.js

@@ -6,6 +6,7 @@ import jQuery from 'ember-views/system/jquery';
 import factory from 'container/tests/test-helpers/factory';
 import isEnabled from 'ember-metal/features';
 import { privatize as P } from 'container/registry';
+import EmberObject from 'ember-runtime/system/object';
 
 let application, appInstance;
 
@@ -179,4 +180,16 @@ if (isEnabled('ember-application-engines')) {
         });
       });
   });
+
+  QUnit.test('can build a registry via Ember.ApplicationInstance.setupRegistry() -- simulates ember-test-helpers', function(assert) {
+    let namespace = EmberObject.create({
+      Resolver: { create: function() { } }
+    });
+
+    let registry = Application.buildRegistry(namespace);
+
+    ApplicationInstance.setupRegistry(registry);
+
+    assert.equal(registry.resolve('service:-document'), document);
+  });
 }