Add missing test for selectFiles on Acceptance.

tests/acceptance/usage-in-acceptance-test.js

@@ -1,6 +1,6 @@
 import { test } from 'qunit';
 import moduleForAcceptance from '../../tests/helpers/module-for-acceptance';
-import { visit, click, find, fillIn, waitUntil, currentURL, currentRouteName } from 'ember-native-dom-helpers';
+import { visit, click, find, fillIn, waitUntil, currentURL, currentRouteName, selectFiles } from 'ember-native-dom-helpers';
 
 moduleForAcceptance('Acceptance | usage in acceptance', {
   beforeEach() {
@@ -55,3 +55,14 @@ test('Usage using `waitUntil` to test unsettled state', async function(assert) {
   assert.equal(currentRouteName(), 'dashboard-example', 'The currentRouteName has updated');
   assert.ok(find('.dashboard-example-header'), 'We are on the dashboard now');
 });
+
+test('Usage `selectFiles`', async function(assert) {
+  await visit('/signup-example');
+
+  let blob = new Blob(['foo', 'bar'], { type: 'text/plain' });
+  let file = new File([blob], 'avatar.png');
+
+  selectFiles('.signup-example-form__avatar', file);
+  assert.equal(find('.signup-example-form__avatar-file-name').innerText, 'avatar.png', 'The file name is showed');
+});
+

tests/dummy/app/controllers/signup-example.js

@@ -2,8 +2,14 @@ import Controller from '@ember/controller';
 import { getProperties, set } from '@ember/object';
 import fetch from 'fetch';
 
-export default Controller.extend({
+export default Ember.Controller.extend({
+  avatarFileName: null,
+
   actions: {
+    onFileSelected(event) {
+      let files = event.target.files;
+      this.set('avatarFileName', files[0].name);
+    },
     signup() {
       set(this, 'isSaving', true);
       let data = JSON.stringify(getProperties(this, 'email', 'password', 'passwordConfirmation'));

tests/dummy/app/templates/signup-example.hbs

@@ -1,6 +1,10 @@
 <h1>Signup example</h1>
 
 <form class="signup-example-form" {{action "signup" on="submit"}}>
+  <p>
+    Avatar File: <span class="signup-example-form__avatar-file-name" >{{avatarFileName}}</span>
+    <input type="file" class="signup-example-form__avatar" onchange={{action "onFileSelected"}} />
+  </p>
   <p>
     Email:
     <input type="text" class="signup-example-form__email" onchange={{action (mut email) value="target.value"}}>

yarn.lock

@@ -5154,7 +5154,7 @@ read@1, read@~1.0.1, read@~1.0.7:
   dependencies:
     mute-stream "~0.0.4"
 
-"readable-stream@1 || 2", readable-stream@^2.0.2, readable-stream@~2.0.5:
+"readable-stream@1 || 2", readable-stream@^2, "readable-stream@^2.0.0 || ^1.1.13", readable-stream@^2.0.2, readable-stream@~2.0.5:
   version "2.0.6"
   resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-2.0.6.tgz#8f90341e68a53ccc928788dacfcd11b36eb9b78e"
   dependencies:
@@ -5165,7 +5165,7 @@ read@1, read@~1.0.1, read@~1.0.7:
     string_decoder "~0.10.x"
     util-deprecate "~1.0.1"
 
-readable-stream@^2, "readable-stream@^2.0.0 || ^1.1.13", readable-stream@^2.1.4, readable-stream@^2.2.2:
+readable-stream@^2.1.4, readable-stream@^2.2.2:
   version "2.2.9"
   resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-2.2.9.tgz#cf78ec6f4a6d1eb43d26488cac97f042e74b7fc8"
   dependencies:
@@ -5612,13 +5612,13 @@ signal-exit@^3.0.0:
   version "3.0.2"
   resolved "https://registry.yarnpkg.com/signal-exit/-/signal-exit-3.0.2.tgz#b5fdc08f1287ea1178628e415e25132b73646c6d"
 
-silent-error@^1.0.0, silent-error@^1.0.1:
+silent-error@^1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/silent-error/-/silent-error-1.0.1.tgz#71b7d503d1c6f94882b51b56be879b113cb4822c"
   dependencies:
     debug "^2.2.0"
 
-silent-error@^1.1.0:
+silent-error@^1.0.1, silent-error@^1.1.0:
   version "1.1.0"
   resolved "https://registry.yarnpkg.com/silent-error/-/silent-error-1.1.0.tgz#2209706f1c850a9f1d10d0d840918b46f26e1bc9"
   dependencies: