Compose UI testing in Android Kotlin - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is Compose UI testing used for?

Compose UI testing is used to check if your app's user interface works correctly by simulating user actions and verifying UI elements.

beginner

Which Compose testing function finds a UI element by its text?

The function composeTestRule.onNodeWithText("text") finds a UI element that displays the given text.

beginner

What does performClick() do in Compose UI testing?

It simulates a user clicking or tapping on a UI element during a test.

beginner

Why use assertIsDisplayed() in Compose UI tests?

To check that a UI element is visible on the screen, ensuring it appears as expected to the user.

beginner

How do you set up a Compose UI test rule in Kotlin?

Use @get:Rule val composeTestRule = createComposeRule() to create a test environment for Compose UI tests.

Which function finds a UI element by its content description in Compose UI testing?

A onNodeWithContentDescription()

B onNodeWithTag()

C onNodeWithText()

D onNodeWithId()

Use onNodeWithContentDescription() to find elements by their content description, which helps with accessibility.

What does assertIsDisplayed() check in a Compose UI test?

A If the element has focus

B If the element is clickable

C If the element is enabled

D If the element is visible on screen

assertIsDisplayed() verifies that the UI element is visible to the user.

How do you simulate a user typing text in a Compose UI test?

A performClick()

B performScroll()

C performTextInput()

D performLongClick()

performTextInput() simulates typing text into a text field.

What is the purpose of createComposeRule() in Compose UI testing?

A To create a UI element

B To set up the Compose test environment

C To launch the app

D To run unit tests

createComposeRule() sets up the environment needed to run Compose UI tests.

Which Compose test function would you use to find a UI element by a test tag?

A onNodeWithTag()

B onNodeWithContentDescription()

C onNodeWithText()

D onNodeWithId()

onNodeWithTag() finds UI elements marked with a specific test tag.

Explain how to write a simple Compose UI test that checks if a button with text "Click me" is visible and can be clicked.

Think about how you find UI elements and simulate user actions in Compose tests.

Describe the role of test tags in Compose UI testing and how they help find UI elements.

Imagine you want to find a button that has no text but you gave it a special tag.