Testing Android Application, Droidcon Torino

Pierto Alberto Rossi
Testing Android Application

About me
➔ Android Developer for hobby
➔ Kebab and Pizza dependent
➔ Always on a diet
➔ I don’t speak any-language

About me
Systems Engineer at Mosaicoon
We do marketing and software development for clients such as

Agenda
• Android
• Android +1
• Why testing application?
• What to test
• Testing Fundamentals
• Create TestProject
• Testing API
• Code Sample

Why testing application?
If possible, reduce number of bugs before production version
not testing

What to test
• Change in orientation
• Is the screen re-draw correctly? Any custom UI code you have should
handle changes in orientation
• Does the application maintain its state? The Activity should not lose
anything that the user has already entered into the UI.
The application should not "forget" its place in the current transaction.
• Change in configuration
• Change in the availability of a keyboard or a change in system language

What to test
• Battery life
• A device has finite "battery budget", and when it is gone, the device is useless
until it is recharged. You need to write your application to minimize battery
usage, you need to test its battery performance, and you need to test the
methods that manage battery usage.
• Dependence on external resources
• If your application depends on network access, SMS, Bluetooth, or GPS, then
you should test what happens when the resource or resources are not
available.

Testing fundamentals
The android testing framework provides an architecture and powerful tools that
help you test every aspect of your application at every level from unit to
framework.
Android test suites are base on JUnit.
Test suites are contained in test packages that are similar to main application
packages, so you don’t need to learn a new set of tools or techniques for desining
and building tests.
The SDK tools for building and tests are available in Eclipse with ADT, and also
in command-line form for use with other IDEs.

Testing fundamentals
The Android JUnit extensions provide component-specific test case classes.
These classes provide helper methods for creating mock objects and methods
that help you control the lifecycle of a component.
The SDK also provides monkeyrunner,
an API for testing devices with Python
programs, and UI/Application Exercizer
Monkey, a command-line tool for
stress-testing UIs by sending
pseudo-random events to a device.

Testing API
Junit
 You can use the Junit TestCase class to do unit testing on a class that doesn’t
call Android APIs.
 AndroidTestCase is a class to do unit testing on Android-dependent objects.
 To display any test result you can use the Junit Assert class.
Instrumentation
 Android instrummentation is a set of control methods or “hooks” in the
Android system. These hooks control an Android component indipendently
of its normal lifecycle.
 They also control how Android loads applications.
 With Android instrumentation you can invoke callback methods in your test
code.

Testing API
There are many class for testing
 TestCase
 ActivityUnitTestCase
 SingleLaunchActivityTestCase
 ActivityInstrumentationTestCase2
 and so on…

Espresso
The core API is small, predictable, and easy to learn and yet remains open for customization.
Espresso tests state expectations, interactions, and assertions clearly without the distraction
of boilerplate content, custom infrastructure, or messy implementation details getting in the
way.
Espresso tests run optimally fast! Leave your waits, syncs, sleeps, and polls behind and let
Espresso gracefully manipulate and assert on the application UI when it is at rest. Enjoy
writing and executing your tests today - try a shot of Espresso!

<Thanks>
pietroalberto.rossi@gmail.com
www.sprik.it

Testing Android Application, Droidcon Torino

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