Screen Robots: UI Tests in Espresso
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This document discusses UI testing with Espresso and introduces Screen Robots. It explains that Espresso is a framework for UI testing on Android. Screen Robots aim to simplify Espresso tests by encapsulating test steps into reusable objects. The document shows how a LoginScreenRobot can encapsulate the login flow into three lines of code rather than having many lines of explicit Espresso actions and assertions. This makes tests more readable and maintainable.
Screen Robots: UI Tests in Espresso
- 1. Screen Robots @brwngrldev UI Tests in Espresso
- 2. 1. User Interface Testing 2. Espresso 3. Screen Robots Agenda @brwngrldev
- 6. Espresso • Framework • View Matchers • View Assertions • View Actions @brwngrldev
- 10. @Test public void shouldProceedWithLoginWhenValid () { onView( withId( R.id.login_username_entry ) ) .perform( typeText( TEST_EMAIL ) ); onView( withId( R.id.login_password_entry ) ) .perform( typeText( TEST_PASSWORD ) ); onView( withId( R.id.login_button ) ) .perform( click() ); intended( hasComponent( hasShortClassName( PACKAGE_NAME ) ) ); } @brwngrldev
- 11. @Test public void shouldProceedWithLoginWhenValid () { onView( withId( … ) ) .perform( typeText( … ) ); onView( withId( … ) ) .perform( typeText( … ) ); onView( withId( … ) ) .perform( click() ); … } @brwngrldev
- 12. @Test public void shouldProceedWithLoginWhenValid () { < let’s do better /> } @brwngrldev
- 13. @brwngrldev
- 14. @Test public void shouldProceedWithLoginWhenValid () { } @brwngrldev
- 15. @Test public void shouldProceedWithLoginWhenValid () { withRobot( LoginScreenRobot.class ) } @brwngrldev
- 16. @Test public void shouldProceedWithLoginWhenValid () { withRobot( LoginScreenRobot.class ) .callLogin( TEST_EMAIL, TEST_PASSWORD ) } @brwngrldev
- 17. @Test public void shouldProceedWithLoginWhenValid () { withRobot( LoginScreenRobot.class ) .callLogin( TEST_EMAIL, TEST_PASSWORD ) .checkIsLoggedIn(); } @brwngrldev
- 18. @brwngrldev Just 3 lines of code!
- 19. public LoginScreenRobot callLogin (String username, String password) { } @brwngrldev Screen Robot
- 20. public LoginScreenRobot callLogin (String username, String password) { return enterTextIntoView ( R.id.login_username_entry, username ) } @brwngrldev Screen Robot
- 21. public LoginScreenRobot callLogin (String username, String password) { return enterTextIntoView ( R.id.login_username_entry, username ) .enterTextIntoView ( R.id.login_password_entry, password ) } @brwngrldev Screen Robot
- 22. public LoginScreenRobot callLogin (String username, String password) { return enterTextIntoView ( R.id.login_username_entry, username ) .enterTextIntoView ( R.id.login_password_entry, password ) .clickOkOnView( R.id.login_button ); } @brwngrldev Screen Robot
- 23. @brwngrldev
- 24. @brwngrldev Test Scenarios • Login with valid credentials • Login with invalid credentials • Login with bad server response • Changing the slide language • Verifying the correctness of the slide content • Entering content into a text slide
- 25. Summary Screen Robots User Interface Testing Espresso @brwngrldev