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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>reveal.js - The HTML Presentation Framework</title>
<meta name="description" content="A framework for easily creating beautiful presentations using HTML">
<meta name="author" content="Hakim El Hattab">
<meta name="apple-mobile-web-app-capable" content="yes" />
<meta name="apple-mobile-web-app-status-bar-style" content="black-translucent" />
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no, minimal-ui">
<link rel="stylesheet" href="css/reveal.css">
<link rel="stylesheet" href="css/theme/black.css" id="theme">
<!-- Code syntax highlighting -->
<link rel="stylesheet" href="lib/css/zenburn.css">
<!-- Printing and PDF exports -->
<script>
var link = document.createElement( 'link' );
link.rel = 'stylesheet';
link.type = 'text/css';
link.href = window.location.search.match( /print-pdf/gi ) ? 'css/print/pdf.css' : 'css/print/paper.css';
document.getElementsByTagName( 'head' )[0].appendChild( link );
</script>R
<!--[if lt IE 9]>
<script src="lib/js/html5shiv.js"></script>
<![endif]-->
</head>
<body>
<div class="reveal">
<!-- Any section element inside of this container is displayed as a slide -->
<div class="slides">
<section>
<h1>Espresso</h1>
<h3>Give Your App An UI Test</h3>
<p>
<small>Created by <a href="http://hakim.se">George Lin</a> / <a href="http://twitter.com/hakimel">@georgelin422</a></small>
</p>
</section>
<section>
<h2>Benifits</h2>
<ul>
<li>Scheduled + Automatic</li>
<ul>
<li>so you don't miss a <i>click</i></li>
</ul>
<li>Automatic Synchronization of the UI</li>
<ul>
<li>no need for <code>sleep(unknown_secs)</code></li>
</ul>
</ul>
</section>
<!-- SETUP ESPRESSO -->
<section>
<section>
<h1>Set Up Espresso</h1>
</section>
<section>
<h3>Step 1 Download Support Library</h3>
<ol>
<li>In Android Studio: Tools -> Android -> SDK Manager</li>
<li>Click <i>SDK Tools</i> Tab and you'll find Android Support Repository</li>
<li>Click the <i>Install packages...</i> button</li>
</ol>
</section>
<section>
<h3>Step 2 Edit build.gradle</h3>
<pre style=display:block;white-space:pre-wrap><font size="4">
dependencies {
androidTestCompile 'com.android.support.test:runner:0.4'
// Set this dependency to use JUnit 4 rules
androidTestCompile 'com.android.support.test:rules:0.4'
// Set this dependency to build and run Espresso tests
androidTestCompile 'com.android.support.test.espresso:espresso-core:2.2.1'
}
</font></pre>
<p>And DONE!</p>
</section>
</section>
<!-- MAIN PART -->
<section>
<section>
<h1>Basics of Espresso</h1>
<h3>Find View, Perform Actions, Check</h3>
</section>
<section>
<h3>Find View, Perform Actions, Check</h3>
<pre style=display:block;white-space:pre-wrap><font size="4">
onView(ViewMatcher)
.perform(ViewAction)
.check(ViewAssertion)
</font></pre>
</section>
<section>
<h3>Find View, Perform Actions, Check</h3>
<pre style=display:block;white-space:pre-wrap><font size="4">
onView(<font color="yellow">withId(android.R.id.button1)</font>)
.perform(ViewAction)
.check(ViewAssertion)
</font></pre>
<img data-src="foo.png">
</section>
<section>
<h3>Find View, Perform Actions, Check</h3>
<pre style=display:block;white-space:pre-wrap><font size="4">
onView(withId(android.R.id.button1))
.perform(<font color="yellow">click()</font>)
.check(ViewAssertion)
</font></pre>
<img src="foo.png">
</section>
<section>
<h3>Find View, Perform Actions, Check</h3>
<pre style=display:block;white-space:pre-wrap><font size="4">
onView(withId(android.R.id.button1))
.perform(click())
.check(<font color="yellow">matches(withText("BAR"))</font>)
</font></pre>
<img src="bar.png">
</section>
<section>
<div>
<img width="429" height="600" src="https://google.github.io/android-testing-support-library/assets/espresso-cheat-sheet-2.1.0.png">
</div>
<a href="https://google.github.io/android-testing-support-library/docs/espresso/cheatsheet/"><font size="4">https://google.github.io/android-testing-support-library/docs/espresso/cheatsheet/</font></a>
</section>
<section>
<h1>Combining Matchers</h1>
with <font color="yellow" style="font-size:72px">Hamcrest</font>
</section>
<section>
<p>Test case: if the Toolbar title is "FOO"</p>
<img width="300" height="500" src="foo_title.png">
</section>
<section>
<p>The title is a <font color="yellow">TextView</font> with a parent of class <font color="yellow">Toolbar</font></p>
<pre>
onView(<font color="yellow">allOf(</font>isAssignableFrom(TextView.class),
withParent(isAssignableFrom(Toolbar.class))<font color="yellow">)</font>)
.check(matches(withText("FOO")))
</pre>
<img src="hamcrest_combine.png">
<a href="http://www.marcphilipp.de/downloads/posts/2013-01-02-hamcrest-quick-reference/Hamcrest-1.3.pdf">http://www.marcphilipp.de/downloads/posts/2013-01-02-hamcrest-quick-reference/Hamcrest-1.3.pdf</a>
<pre>
testCompile 'org.hamcrest:hamcrest-library:1.3'
</pre>
</section>
<section>
<pre>
onView(<font color="yellow">allOf(</font>isAssignableFrom(TextView.class),
withParent(isAssignableFrom(Toolbar.class))<font color="yellow">)</font>)
.check(matches(withText("FOO")))
</pre>
<p>GG in this case</p>
<pre>
<Toolbar
android:id="@+id/toolbar"
android:layout_width="match_parent"
android:layout_height="?attr/actionBarSize"
android:background="?attr/colorPrimary">
<font color="yellow">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
</font>
</Toolbar>
</pre>
</section>
<section>
<h1>Custom Matchers</h1>
</section>
<section>
<p>Test case: if the Toolbar title is "FOO"</p>
<img width="300" height="500" src="foo_title.png">
</section>
<section>
<p>Veryfy the <i>Toolbar</i> itself, not verify descendant <i>TextView</i></p>
<pre>
onView(isAssignableFrom(Toolbar.class))
.check(<font color="yellow">ViewAssertion</font>)
</pre>
</section>
<section>
<pre>
onView(isAssignableFrom(Toolbar.class))
.check(<font color="yellow">Assert this Toolbar has its title "FOO"</font>)
</pre>
</section>
<section>
<pre>
onView(isAssignableFrom(Toolbar.class))
.check(matches(<font color="yellow">withToolbarTitle("FOO")</font>))
</pre>
</section>
<section>
<pre>
onView(isAssignableFrom(Toolbar.class))
.check(matches(<font color="yellow">withToolbarTitle("FOO")</font>))
</pre>
<pre><font size="4">
<font color="orange">public static</font> Matcher<View> <font color="cadetblue">withToolbarTitle</font>(CharSequence title) {
<font color="orange">return</font> withToolbarTitle(is(title)); <font color="gray">// is(T) from Hamcrest</font>
}
<font color="orange">public static</font> Matcher<View> <font color="cadetblue">withToolbarTitle</font>(<font color="orange">final</font> Matcher<CharSequence> textMatcher) {
checkNotNull(textMatcher);
<font color="orange">return new</font> BoundedMatcher<View, Toolbar>(Toolbar.class) {
<font color="yellow">@Override</font>
<font color="orange">public void</font> <font color="cadetblue">describeTo</font>(Description description) {
description.appendText("with title: ");
textMatcher.describeTo(description);
}
<font color="yellow">@Override</font>
<font color="orange">public boolean</font> <font color="cadetblue">matchesSafely</font>(Toolbar toolbar) {
<font color="orange">return</font> textMatcher.matches(toolbar.getTitle());
}
};
}
</font></pre>
</section>
<section>
<h1>Test AdapterView</h1>
<p>Using<font color="yellow" style="font-size:72px"> onData</font></p>
</section>
<section>
<p style="font-size:72px">Why not use <font color="yellow">onView</font>?</p>
</section>
<section>
<div>
<img width="429" height="600" src="https://google.github.io/android-testing-support-library/assets/espresso-cheat-sheet-2.1.0.png">
</div>
<a href="https://google.github.io/android-testing-support-library/docs/espresso/cheatsheet/"><font size="4">https://google.github.io/android-testing-support-library/docs/espresso/cheatsheet/</font></a>
</section>
<section>
<pre>
onData(ObjectMatcher)
.DataOptions <font color="gray">// reference DataInteraction.java</font>
.perform(ViewAction)
.check(ViewAssertion)
</pre>
<p>Click item with String "Americano" in a Spinner</p>
<pre>
onData(allOf(is(instanceOf(String.class)), is("Americano")))
.inAdapterView(R.id.spinner)
.perform(click());
</pre>
</section>
<section>
<h1>Test RecyclerView</h1>
</section>
<section>
<p>RecyclerView is <font color="red">NOT</font> an AdapterView</p>
<div style="width: 429px; font-size: 2em; margin: 0 auto; vertical-align: middle; background-color: #EFEFEF; text-decoration: line-through; color: red">
<code style="color: #3B3B3B">onData</code>
</div>
</section>
<section>
<p>RecyclerView is a <i>ViewGroup</i></p>
<img src="recyclerview.png">
<p>So, use onView</p>
</section>
<section>
<p>Click item at position 27</p>
<pre>
onView(withId(R.id.recycler_view))
.perform(<font color="yellow">RecyclerViewActions.actionOnItemAtPosition(27, click())</font>);
</pre>
<p>in <i>build.gradle</i></p>
<pre><font size="4">
androidTestCompile 'com.android.support.test.espresso:espresso-contrib:2.2'
</font></pre>
<p>More in <i>espresso-contrib</i></P>
<ul>
<li>DrawerLayout</li>
<li>DatePicker and TimePicker</li>
</ul>
</section>
<section>
<h1>Idling Resource</h1>
</section>
<section>
<p>When we talk about Espresso's <font color="yellow">Synchronization</font>, it means...</p>
<p>When doing tests...</p>
<ul>
<li>no UI events in the current message queue</li>
<li>no tasks in the default AsyncTask thread pool</li>
</ul>
</section>
<section>
<p>In some cases, we need to define out own <font color="yellow">Idling Resource</font></p>
<p>Implement <font color="yellow">IdlingResource</font> and override three methods</p>
<pre>
@Override public String getName() {
return IntentServiceIdlingResource.class.getName();
}
</pre>
<pre>
@Override public void registerIdleTransitionCallback(
ResourceCallback resourceCallback) {
<font color="yellow">mResourceCallback</font> = resourceCallback;
}
</pre>
<pre>
@Override public boolean isIdleNow() {
boolean idle = !isIntentServiceRunning();
if (idle && resourceCallback != null) {
<font color="yellow">mResourceCallback</font>.onTransitionToIdle();
}
return idle;
}
</pre>
</section>
<section>
<p>Register your IdlingResource in test</p>
<pre>
@Before
public void registerIntentServiceIdlingResource() {
idlingResource = new IntentServiceIdlingResource(
InstrumentationRegistry.getTargetContext());
<font color="yellow">Espresso.registerIdlingResources(idlingResource);</font>
}
@After
public void unregisterIntentServiceIdlingResource() {
<font color="yellow">Espresso.unregisterIdlingResources(idlingResource);</font>
}
</pre>
</section>
<!-- <section>
<h2>Bypass real instance</h2>
<p>with <font color="yellow">Dagger</font> and <font color="yellow">Mockito</font></p>
</section>
<section>
<p>In MyAppComponent.class</p>
<pre>
@Singleton @Component(modules = <font color="yellow">DataModule.class</font>)
public interface MyAppComponent extends CommonComponent {
}
</pre>
<p>give it a mock module</P>
<pre>
@Singleton @Component(modules = <font color="yellow">MockDataModule.class</font>)
public interface MyAppComponent extends CommonComponent {
}
</pre>
</section>
<section>
<p>In MockDataModule.class</p>
<pre>
@Singleton @Component(modules = <font color="yellow">DataModule.class</font>)
public interface MyAppComponent extends CommonComponent {
}
</pre>
</section> -->
</section>
<!-- RUN ESPRESSO TESTS -->
<section>
<section>
<h1>Run Espresso Test</h1>
</section>
<section>
<h3>Step 1 Connect Device</h3>
<p>Make sure your device is connected with usb</p>
</section>
<section>
<h3>Step 2 Turn Off Animations</h3>
<p>Turn off animations from <i>Settings</i> by opening <i>Developing Options</i> and turning all the following options off:</p>
<ul>
<li>Window animation scale</li>
<li>Transition animation scale</li>
<li>Animator duration scale</li>
</ul>
</section>
<section>
<h3>Step 3 Run</h3>
<code>./gradlew connectedAndroidTest</code>
</section>
</section>
<section>
<h3>Review</h3>
<ul>
<li>Automatic Synchronization</li>
<li>Set up Espresso</li>
<li>Basic - find view, perform actions, check</li>
<li>Hamcrest - logical combinations for tests</li>
<li>Costum matchers</li>
<li>Test AdapterView</li>
<li>Test RecyclerView</li>
<li>Idling Resource</li>
<li>Run Espresso tests</li>
</ul>
</section>
<section>
<h2>Thank you</h2>
<h3>Questions are welcome</h3>
</section>
</div>
</div>
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