kotlin-testing-kmp

Structure Kotlin Multiplatform unit tests by placing cross-platform validation logic in the commonTest source set using the kotlin.test library. This ensures shared code is validated consistently across all targets before adding platform-specific tests.

The recommended testing pyramid for Kotlin Multiplatform emphasizes fast local unit tests in commonTest, selective instrumented and UI tests, and guarded integration tests to ensure stability and maintainability across shared and platform-specific source sets.

Yes, Robolectric can be used for instrumented tests in Kotlin Multiplatform projects. This skill guides the setup of Robolectric and instrumented tests specifically for platform-specific source sets to validate Android-dependent shared logic.

Manage test doubles in Kotlin Multiplatform by delineating platform boundaries within your shared logic. This skill provides strategies for implementing test doubles that isolate commonTest code from platform-specific dependencies for reliable cross-target validation.

Yes, this skill covers Compose Multiplatform UI and screenshot testing. It provides best practices for designing UI tests and capturing screenshot tests to validate shared interfaces across different platform targets.

Write platform-specific tests instead of commonTest in Kotlin Multiplatform when validating platform-dependent implementations or setting up instrumented tests. Use commonTest with kotlin.test for shared logic, and add platform tests as needed for boundaries.