__name__-test.js

import Application from '@ember/application';

import { initialize } from '<%= dasherizedModulePrefix %>/instance-initializers/<%= dasherizedModuleName %>';
import { module, test } from 'qunit';
<% if (destroyAppExists) { %>import destroyApp from '../../helpers/destroy-app';<% } else { %>import { run } from '@ember/runloop';<% } %>

module('<%= friendlyTestName %>', function(hooks) {
  hooks.beforeEach(function() {
    this.TestApplication = Application.extend();
    this.TestApplication.instanceInitializer({
      name: 'initializer under test',
      initialize
    });
    this.application = this.TestApplication.create({ autoboot: false });
    this.instance = this.application.buildInstance();
  });
  hooks.afterEach(function() {
    <% if (destroyAppExists) { %>destroyApp(this.application);<% } else { %>run(this.application, 'destroy');<% } %>
    <% if (destroyAppExists) { %>destroyApp(this.instance);<% } else { %>run(this.instance, 'destroy');<% } %>
  });

  // Replace this with your real tests.
  test('it works', async function(assert) {
    await this.instance.boot();

    assert.ok(true);
  });
});