dart-migrate-to-checks-package

To migrate Dart test assertions from package:matcher to package:checks, you replace legacy expect calls with type-safe check syntax. This systematic refactoring targets test suites to improve type safety, IDE autocomplete, and failure diagnostics.

Refactoring complex matchers like TypeMatcher.having in Flutter tests requires mapping legacy syntax to the modern checks library. A comprehensive syntax mapping reference handles deep equality, asynchronous expectations, and custom matcher replacements.

You should modernize your Dart test suite to use the checks library to resolve technical debt and verbosity associated with package:matcher. It provides type-safe assertions, better IDE autocomplete, and highly readable, detailed failure diagnostics.

Yes, the checks library supports handling collection equality and asynchronous expectations. The migration process specifically targets these complex scenarios, providing a structured workflow to translate them into type-safe check syntax.

Yes, you can use this migration workflow for legacy Flutter test suites. It provides systematic refactoring guidance for replacing custom matchers, ensuring your test suite adopts the modern, type-safe checks library effectively.