Testing Validation

[ThomasCode92]

🧭 Overview

This PR introduces a comprehensive form validation system for web applications, demonstrating how to create reusable validation logic and integrate it seamlessly into HTTP handlers with complete test coverage.

✨ What's New?

• 📝 Form Validation Framework: Created forms.go with a complete validation system including field checking, required field validation, and custom validation rules.
• 🧪 Comprehensive Test Suite: Implemented forms_test.go with tests covering all validation scenarios and edge cases.
• 🔧 Handler Integration: Enhanced the Login handler to validate email and password fields before processing.
• 🔍 Error Management: Built an error system that accumulates multiple validation errors per field.
• 🎯 Reusable Components: Designed validation logic to be easily reused across different handlers and forms.

💡 Key Learning Points

• ✅ Writing tests for form validation logic with comprehensive edge case coverage
• 🛠️ Building reusable validation components that separate concerns
• 🔗 Integrating validation into HTTP handlers without tight coupling
• 📊 Managing and retrieving field-specific validation errors
• 🧩 Using httptest package to simulate realistic HTTP request scenarios