[Jagadeeshftw]

This PR adds a complete testing guide (docs/testing.md) that documents how to run tests, write new tests, and understand the testing strategy for Bridgelet Core smart contracts.

What's Included

📚 Documentation Sections

1. Quick Start - Immediate commands to run tests
2. Running Tests - Detailed instructions for:
   • Unit tests (individual contract functions)
   • Integration tests (cross-contract interactions)
   • Test coverage tools
3. Testing Strategy - Coverage goals, test categories, and structure
4. Writing Tests - Comprehensive examples including:
   • Unit test examples from actual codebase
   • Error condition testing
   • Authorization mocking
   • Integration test patterns
   • Ledger time manipulation
   • Best practices
5. Local Sandbox Testing - Complete guide for:
   • Sandbox setup and prerequisites
   • Deploying contracts locally
   • Interacting with deployed contracts
   • Using test scripts
6. Troubleshooting Guide - Solutions for common issues:
   • Contract not found errors
   • Integration test import errors
   • Authorization errors
   • Error code debugging
   • Ledger sequence issues
   • WASM build errors
   • Test compilation errors
   • Sandbox connection issues
   • Test timeouts

Key Features

✅ Clear and Reproducible Instructions - All commands are tested and verified
✅ Working Examples - Code examples based on actual test files in the codebase
✅ Complete Coverage - Covers all testing scenarios (unit, integration, sandbox)
✅ Helpful Troubleshooting - Comprehensive solutions for common problems
✅ Best Practices - Guidelines for writing maintainable tests

Files Changed

• docs/testing.md - New comprehensive testing documentation (527 lines)

Testing

The documentation includes examples that match the existing test structure:

• Unit tests: contracts/ephemeral_account/src/test.rs
• Integration tests: contracts/sweep_controller/tests/integration.rs

All commands and examples have been verified against the current codebase structure.

Acceptance Criteria Met

• ✅ docs/testing.md file exists
• ✅ Instructions are clear and reproducible
• ✅ Examples are working and tested
• ✅ Covers all testing scenarios
• ✅ Troubleshooting section is helpful

Related

Addresses the need for comprehensive testing documentation as referenced in the main README.md.

Closes #11

[Jagadeeshftw]

@phertyameen Please review

[Jagadeeshftw]

@phertyameen Updated!