Overview of UI testing in Compose
summary
Shows how to test Jetpack Compose UIs end-to-end using the ui-test-junit4 and the debug-only ui-test-manifest AAR, creating a ComposeTestRule (or AndroidComposeRule) and calling setContent or launching an activity. Explains the merged semantic tree vs unmerged semantics, inspecting with Layout Inspector and printToLog, writing a custom onNode matcher (joined text) to handle annotated string lists, controlling animations by pausing the main clock and advancing to 4s, and capturing bitmaps to SD card (total4.png).
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chapters (15)
- 0:00Introduction to UI testing in Compose
- 0:53Types of Android tests overview
- 3:03Adding UI test dependencies
- 4:27Setting up Compose test rules
- 6:13Understanding semantic tree in Compose
- 10:28Inspecting UI with Layout Inspector
- 14:58Debugging semantic tree with logs
- 17:06Handling merged text semantics
- 19:40Writing custom node matchers
- 22:46Testing text assertions in Compose
- 25:13Testing animations in UI tests
- 27:42Capturing animation snapshots
- 30:09Idling resources in Compose tests
- 31:52Compose test cheat sheet overview
- 33:15Q&A and resources
