[BUGFIX] Don't use destroyApp if new API is being used

blueprints/acceptance-test/index.js

@@ -25,7 +25,7 @@ module.exports = useTestFrameworkDetector({
     return {
       testFolderRoot: testFolderRoot,
       friendlyTestName,
-      destroyAppExists: destroyAppExists
+      destroyAppExists
     };
   }
 });

blueprints/initializer-test/index.js

@@ -1,6 +1,8 @@
 'use strict';
 
+const path = require('path');
 const stringUtils = require('ember-cli-string-utils');
+const existsSync = require('exists-sync');
 
 const useTestFrameworkDetector = require('../test-framework-detector');
 
@@ -9,7 +11,8 @@ module.exports = useTestFrameworkDetector({
   locals: function(options) {
     return {
       friendlyTestName: ['Unit', 'Initializer', options.entity.name].join(' | '),
-      dasherizedModulePrefix: stringUtils.dasherize(options.project.config().modulePrefix)
+      dasherizedModulePrefix: stringUtils.dasherize(options.project.config().modulePrefix),
+      destroyAppExists: existsSync(path.join(this.project.root, '/tests/helpers/destroy-app.js'))
     };
   }
 });

blueprints/initializer-test/qunit-files/tests/unit/initializers/__name__-test.js

@@ -3,7 +3,7 @@ import { run } from '@ember/runloop';
 
 import { initialize } from '<%= dasherizedModulePrefix %>/initializers/<%= dasherizedModuleName %>';
 import { module, test } from 'qunit';
-import destroyApp from '../../helpers/destroy-app';
+<% if (destroyAppExists) { %>import destroyApp from '../../helpers/destroy-app';<% } else { %>import { run } from '@ember/runloop'; <% } %>
 
 module('<%= friendlyTestName %>', {
   beforeEach() {
@@ -13,7 +13,7 @@ module('<%= friendlyTestName %>', {
     });
   },
   afterEach() {
-    destroyApp(this.application);
+    <% if (destroyAppExists) { %>destroyApp(this.application);<% } else { %>run(this.application, 'destroy');<% } %>
   }
 });