deepen-shallow-module

Module decomposition improves testability by separating concerns into focused modules. Isolating mixed responsibilities enables easier unit testing of business logic because each component handles a single responsibility independently.

A shallow module is a component with mixed responsibilities that lacks a clear single purpose. Identifying shallow modules helps developers apply refactoring patterns to separate concerns and create deeper, more focused architectural units.

Separating concerns requires decomposing mixed-responsibility modules into specific roles like Repository, Validator, Factory, Mutator, and Presenter. This refactoring pattern isolates business logic to improve code organization and maintainability.

Module decomposition requires knowledge of the codebase structure and concerns. Understanding the existing architecture is necessary to accurately identify shallow modules and generate appropriate refactoring suggestions for your specific software patterns.