testing-patterns

To write deterministic Kotlin Gradle plugin tests, apply the Arrange/Act/Assert pattern, use temp directory fixtures for isolation, and distribute tests across dedicated source sets to prevent cross-contamination and flakiness.

Structure Gradle TestKit functional tests with Kotest by placing them in a dedicated functionalTest source set, ensuring fast unit tests remain isolated while validating end-to-end plugin behavior reliably.

Use Konsist for architecture checks by placing tests in a dedicated slopTest source set, validating structural integrity and enforcing rules like the 90% thin-orchestrator coverage requirement across your Kotlin codebase.

Yes, use ProjectBuilder for unit testing Gradle plugin components by combining it with the createExtension helper pattern, enabling fast and testable component configuration without launching a full Gradle build.

Gradle TestKit tests fail intermittently due to a lack of determinism, which you resolve by applying temp directory patterns and ensuring proper test isolation across your configured source sets.

The 90% thin-orchestrator coverage rule is an architecture constraint enforced via Konsist, dictating that orchestrator methods must remain thin and delegate logic to testable internal methods to achieve 90% unit test coverage.