Application
Programming
Hend Alkittawi

Android Testing
Introduction to Testing Android Apps

ANDROID TESTING
-

There are two types of tests for unit testing in Android, both
of which use the JUnit testing framework
-

-

JVM tests for testing your Java code in the project.
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Execute quickly (milliseconds) on your machine’s JVM

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Located in the test source set (project > app > src > test)

Instrumented tests for testing code that uses the Android SDK
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May take longer (seconds) on an emulator or Android device
directly

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Located in the androidTest source set (project > app > src >
androidTest)

ANDROID TESTING

ANDROID TESTING
-

Shortcut to the “create a test” wizard: ctrl+shift+T (or
command+shift+T) when your cursor is inside of the class you
want to create a test for.

-

To run a test
-

Right click on the test class, choose “Run” OR Click ▶ next to
the test name to run

○

For instrumented tests, connect a device first (these tests
require a device - virtual or physical).

ANDROID TESTING
-

-

JVM Tests
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Test the Java code in your project

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Follow the same paradigms as the JUnit tests previously discussed
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Naming conventions for classes and methods

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Use of assert statements

Instrumented tests
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Test code in your project which uses the Android SDK (e.g. Activity,
TextView, etc)

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ActivityScenario provides APIs to start and drive an Activity’s lifecycle
state for testing!

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Espresso for Android UI testing
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State expectations

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Interactions

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assertions

ACTIVITY LIFE CYCLE
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As a user navigates through, out of, and back to your app, the
Activity instances in your app transition through different
states in their lifecycle.

-

The Activity class provides a number of callbacks that let the
activity know when a state changes or that the system is
creating, stopping, or resuming an activity or destroying the
process the activity resides in.

-

The activity lifecycle | Android Developers

ACTIVITY LIFE CYCLE

CODE DEMO
-

Show how to run
Android tests in
Android Studio.

DO YOU HAVE ANY
QUESTIONS?

THANK
YOU!

@

hend.alkittawi@utsa.edu

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