Remove unused testing helper files.

As of ember-source@3.0.0 (and ember-data@3.0.0) the testing blueprints
are automatically emitting emberjs/rfcs#232 or emberjs/rfcs#268
compatible output. With those, these helpers are no longer used for new
apps.

Existing apps should only delete these files once they have migrated to
the new testing system...

tests/fixtures/addon/component-with-template/tests/acceptance/main-test.js

@@ -1,30 +1,22 @@
-import startApp from '../helpers/start-app';
-import destroyApp from '../helpers/destroy-app';
+import Ember from 'ember';
+import { setupAcceptanceTest } from 'ember-qunit';
+import { visit } from '@ember/test-helpers';
 import { module, test } from 'qunit';
 
-module('Acceptance', {
-  beforeEach() {
-    this.application = startApp();
-  },
-  afterEach() {
-    destroyApp(this.application);
-  }
-});
+module('Acceptance', function(hooks) {
+  setupApplicationTest(hooks);
 
-test('renders properly', function(assert) {
-  visit('/');
+  test('renders properly', async function(assert) {
+    await visit('/');
 
-  andThen(function() {
-    var element = find('.basic-thing');
-    assert.equal(element.first().text().trim(), 'WOOT!!');
+    var element = this.element.querySelector('.basic-thing');
+    assert.equal(element.textContent, 'WOOT!!');
   });
-});
 
-test('renders imported component', function(assert) {
-  visit('/');
+  test('renders imported component', async function(assert) {
+    await visit('/');
 
-  andThen(function() {
-    var element = find('.second-thing');
-    assert.equal(element.first().text().trim(), 'SECOND!!');
+    var element = this.element.querySelector('.second-thing');
+    assert.equal(element.textContent, 'SECOND!!');
   });
 });

tests/fixtures/addon/kitchen-sink/tests/acceptance/main-test.js

@@ -1,32 +1,24 @@
-import startApp from '../helpers/start-app';
-import destroyApp from '../helpers/destroy-app';
+import Ember from 'ember';
+import { setupAcceptanceTest } from 'ember-qunit';
+import { visit } from '@ember/test-helpers';
 import truthyHelper from 'kitchen-sink/test-support/helper';
 import { module, test } from 'qunit';
 
-module('Acceptance', {
-  beforeEach() {
-    this.application = startApp();
-  },
-  afterEach() {
-    destroyApp(this.application);
-  }
-});
+module('Acceptance', function(hooks) {
+  setupApplicationTest(hooks);
 
-test('renders properly', function(assert) {
-  visit('/');
+  test('renders properly', async function(assert) {
+    await visit('/');
 
-  andThen(function() {
-    var element = find('.basic-thing');
-    assert.equal(element.first().text().trim(), 'WOOT!!');
+    var element = this.element.querySelector('.basic-thing');
+    assert.equal(element.textContent, 'WOOT!!');
     assert.ok(truthyHelper(), 'addon-test-support helper');
   });
-});
 
-test('renders imported component', function(assert) {
-  visit('/');
+  test('renders imported component', async function(assert) {
+    await visit('/');
 
-  andThen(function() {
-    var element = find('.second-thing');
-    assert.equal(element.first().text().trim(), 'SECOND!!');
+    var element = this.element.querySelector('.second-thing');
+    assert.equal(element.textContent, 'SECOND!!');
   });
 });

tests/fixtures/brocfile-tests/default-development/tests/integration/app-boots-test.js

@@ -1,23 +1,15 @@
 import Ember from 'ember';
-import startApp from '../helpers/start-app';
-import destroyApp from '../helpers/destroy-app';
+import { setupAcceptanceTest } from 'ember-qunit';
+import { visit } from '@ember/test-helpers';
 import { module, test } from 'qunit';
 
-module('default-development - Integration', {
-  beforeEach() {
-    this.application = startApp();
-  },
-  afterEach() {
-    destroyApp(this.application);
-  }
-});
-
-test('the application boots properly', function(assert) {
-  assert.expect(1);
+module('default-development - Integration', function(hook) {
+  setupApplicationTest(hooks);
 
-  visit('/');
+  test('renders properly', async function(assert) {
+    await visit('/');
 
-  andThen(function() {
-    assert.ok(Ember.$('.ember-view').length > 0);
+    var elements = this.element.querySelectorAll('.ember-view');
+    assert.ok(elements.length > 0);
   });
 });

tests/fixtures/brocfile-tests/pods-templates/tests/integration/pods-template-test.js

@@ -1,23 +1,17 @@
 import Ember from 'ember';
-import startApp from '../helpers/start-app';
-import destroyApp from '../helpers/destroy-app';
+import { setupAcceptanceTest } from 'ember-qunit';
+import { visit } from '@ember/test-helpers';
 import { module, test } from 'qunit';
 
-module('pods based templates', {
-  beforeEach() {
-    this.application = startApp();
-  },
-  afterEach() {
-    destroyApp(this.application);
-  }
-});
+module('pods based templates', function(hooks) {
+  setupApplicationTest(hooks);
 
-test('the application boots properly with pods based templates', function(assert) {
-  assert.expect(1);
+  test('the application boots properly with pods based templates', async function(assert) {
+    assert.expect(1);
 
-  visit('/');
+    await visit('/');
 
-  andThen(function() {
-    assert.equal(Ember.$('#title').text(), 'ZOMG, PODS WORKS!!');
+    let actual = this.element.querySelector('#title').textContent
+    assert.equal(actual, 'ZOMG, PODS WORKS!!');
   });
 });

tests/fixtures/brocfile-tests/pods-with-prefix-templates/tests/integration/pods-template-test.js

@@ -1,24 +1,17 @@
 import Ember from 'ember';
-import startApp from '../helpers/start-app';
-import destroyApp from '../helpers/destroy-app';
+import { setupAcceptanceTest } from 'ember-qunit';
+import { visit } from '@ember/test-helpers';
 import { module, test } from 'qunit';
 
-module('pods based templates', {
-  beforeEach() {
-    this.application = startApp();
-  },
-  afterEach() {
-    destroyApp(this.application);
-  }
-});
-
+module('pods based templates', function(hooks) {
+  setupApplicationTest(hooks);
 
-test('the application boots properly with pods based templates with a podModulePrefix set', function(assert) {
-  assert.expect(1);
+  test('the application boots properly with pods based templates with a podModulePrefix set', async function(assert) {
+    assert.expect(1);
 
-  visit('/');
+    await visit('/');
 
-  andThen(function() {
-    assert.equal(Ember.$('#title').text(), 'ZOMG, PODS WORKS!!');
+    let actual = this.element.querySelector('#title').textContent
+    assert.equal(actual, 'ZOMG, PODS WORKS!!');
   });
 });