Dart Test Fundamentals When to use this skill Use this skill when: - Writing new test files. - Structuring test suites with . - Configuring test execution via . - Understanding test lifecycle methods. Discovery To find candidates for improving test structure: Cleanup Search for tests that use for cleanup instead of : - Regex : (Check if this is used for resource cleanup inside a test). Core Concepts 1. Test Structure ( and ) - : The fundamental unit of testing. - : Used to organize tests into logical blocks. - Groups can be nested. - Descriptions are concatenated (e.g., "Group Description Tes…