cweill/gotests v1.8.0

v1.8.0 - Full Go Generics Support

on GitHub

🎉 Full Go Generics Support

This release adds complete support for Go generics (type parameters), enabling gotests to generate tests for generic functions and methods on generic types.

✨ Key Features

• 🔧 Generic Functions: Generate tests for functions with type parameters

  func FindFirst[T comparable](slice []T, target T) (int, error)

• 🏗️ Generic Types: Support for methods on generic types

  type Set[T comparable] struct { ... }
  func (s *Set[T]) Add(v T)

• 🎯 All Constraint Types: any, comparable, union types (int64 | float64), approximation (~int)

• 🧠 Smart Type Mapping: Intelligent defaults for type instantiation

  • any → int
  • comparable → string
  • Union types → first option
  • Approximation → underlying type

• 🔄 Multiple Type Parameters: Handles functions like Pair[T, U any]

📊 Test Coverage

• ✅ 97.5% main package coverage
• ✅ 83.5% overall project coverage
• ✅ 100% coverage on all new parser functions
• ✅ 8 comprehensive generic test patterns

🔧 Technical Improvements

Parser Enhancements:

• New parseTypeDecls() extracts type parameters from type declarations
• New parseTypeParams() parses AST field lists
• New extractBaseTypeName() handles receiver types

Template Functions:

• TypeArgs - generates concrete type arguments for calls
• FieldType - substitutes type parameters in field declarations
• ReceiverType - substitutes type parameters in receiver instantiations

Model Updates:

• New TypeParam struct
• Added TypeParams field to Function
• Helper methods: IsGeneric(), HasGenericReceiver()

📚 Documentation

Added comprehensive "Go Generics Support" section to README with:

• Example: Generic function test generation
• Example: Methods on generic types
• Type constraint mapping reference

🐛 Fixes

Closes #165

📦 Installation

go install github.com/cweill/gotests/gotests@v1.8.0

🙏 Credits

🤖 Developed with assistance from Claude Code

Full Changelog: v1.7.0...v1.8.0