Add comprehensive unit tests for MCP integration #61072

budzanowski · 2025-09-23T09:54:16Z

Summary

This PR adds extensive unit test coverage for the WooCommerce Model Context Protocol (MCP) integration, building on #60901 with comprehensive validation of security, authentication, and business logic.

Base Branch: add/mcp-to-woocommerce (must merge first)
Total Coverage: 25 tests, 35+ assertions, 100% passing

Test Coverage Added

🧪 MCPAdapterProviderTest (10 tests)

✅ Feature flag enable/disable logic
✅ Namespace filtering (woocommerce/ abilities by default)
✅ Custom filter support for extending ability inclusion
✅ Initialization state management and double-init prevention
✅ Error handling for edge cases (empty arrays, validation workarounds)

🔐 WooCommerceRestTransportTest (15 tests)

✅ HTTPS enforcement with proper test bypass pattern
✅ API key validation (format, headers, missing keys)
✅ Database authentication with hash_equals security validation
✅ Permission system (read/write/read_write for HTTP methods)
✅ User context switching and existence validation
✅ Security edge cases (invalid credentials, non-existent users)

🏗️ Testing Framework Established

Dependency Bootstrapping

Manual loading of MCP adapter and WordPress Abilities API in test environment
Proper cleanup and isolation between tests

Security Testing Patterns

SSL bypass using woocommerce_mcp_allow_insecure_transport filter (with clear comments why)
Database authentication validation without hitting actual REST endpoints
Permission boundary testing using reflection for static properties

WordPress Integration

Feature flag testing using proper WordPress options (not filters)
API key database insertion/cleanup patterns
User factory integration for realistic authentication scenarios

🎯 Testing Philosophy

Test business logic, not dependencies - We trust WordPress's is_ssl() and focus on our authentication/authorization code
Edge case coverage - Invalid formats, missing users, permission boundaries, empty data
Security first - Validates timing-attack protection, user existence, proper context switching
Clear separation - Unit tests for business logic, avoiding integration test complexity

🔍 Key Validations

Feature Flag System: Ensures MCP only initializes when properly enabled
Security Boundaries: Validates HTTPS enforcement, API key formats, authentication flow
Permission Model: Confirms read/write/read_write permissions map correctly to HTTP methods
Ability Management: Tests namespace filtering and custom plugin integration points
Error Handling: Validates proper error codes and messages for all failure scenarios

📊 Test Results

MCPAdapterProviderTest: 10/10 tests passing
WooCommerceRestTransportTest: 15/15 tests passing
Total: 25 tests, 35+ assertions ✅

This establishes a solid foundation for testing MCP integrations and validates the security and business logic of the implementation without requiring actual MCP protocol connections.

More technical details available in MCP Integration Documentation.

🤖 Generated with Claude Code

github-actions · 2025-09-26T16:48:30Z

Testing Guidelines

Hi @kalessil @woocommerce/developer-advocacy,

Apart from reviewing the code changes, please make sure to review the testing instructions (Guide) and verify that relevant tests (E2E, Unit, Integration, etc.) have been added or updated as needed.

Reminder: PR reviewers are required to document testing performed. This includes:

🖼️ Screenshots or screen recordings.
📝 List of functionality tested / steps followed.
🌐 Site details (environment attributes such as hosting type, plugins, theme, store size, store age, and relevant settings).
🔍 Any analysis performed, such as assessing potential impacts on environment attributes and other plugins, conducting performance profiling, or using LLM/AI-based analysis.

⚠️ Within the testing details you provide, please ensure that no sensitive information (such as API keys, passwords, user data, etc.) is included in this public issue.

github-actions · 2025-09-27T08:02:39Z

Test using WordPress Playground

The changes in this pull request can be previewed and tested using a WordPress Playground instance.
WordPress Playground is an experimental project that creates a full WordPress instance entirely within the browser.

Test this pull request with WordPress Playground.

Note that this URL is valid for 30 days from when this comment was last updated. You can update it by closing/reopening the PR or pushing a new commit.

This PR adds extensive test coverage for the WooCommerce Model Context Protocol (MCP) integration, establishing testing patterns and validating core functionality. ## Test Coverage Added ### MCPAdapterProviderTest (10 tests) - Feature flag enable/disable logic - Namespace filtering (woocommerce/ abilities by default) - Custom filter support for extending ability inclusion - Initialization state management and double-init prevention - Error handling for edge cases ### WooCommerceRestTransportTest (15 tests) - HTTPS enforcement with proper bypass for testing - API key validation (format, headers, authentication flow) - Database authentication logic with hash_equals validation - Permission system (read/write/read_write for HTTP methods) - User context switching and existence validation - Security edge cases (invalid credentials, missing users) ## Testing Framework Established - **Dependency Bootstrapping**: Manual loading of MCP adapter and WordPress Abilities API - **Feature Flag Testing**: Proper WordPress option-based feature management - **SSL Bypass Pattern**: Using woocommerce_mcp_allow_insecure_transport filter with clear comments - **Database Testing**: Safe API key insertion/cleanup patterns - **Permission Testing**: Reflection-based testing of static properties ## Key Testing Principles Applied - Test business logic, not external dependencies - Use proper WordPress testing patterns - Focus on edge cases and security scenarios - Clear separation between unit and integration concerns - Comprehensive coverage without over-testing **Total: 25 tests, 35+ assertions** All tests pass and validate the security, authentication, and business logic of the MCP integration without requiring actual MCP protocol connections. 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <[email protected]>

Updates WooCommerceRestTransportTest to match the corrected constructor signature after fixing the interface compatibility issue. 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <[email protected]>

- Change generic $include parameter to descriptive $should_include in filter callback - Apply WordPress coding standards formatting to test files - Fix array syntax and spacing consistency - Add missing trailing newlines 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <[email protected]>

* Add comprehensive unit tests for MCP integration This PR adds extensive test coverage for the WooCommerce Model Context Protocol (MCP) integration, establishing testing patterns and validating core functionality. ## Test Coverage Added ### MCPAdapterProviderTest (10 tests) - Feature flag enable/disable logic - Namespace filtering (woocommerce/ abilities by default) - Custom filter support for extending ability inclusion - Initialization state management and double-init prevention - Error handling for edge cases ### WooCommerceRestTransportTest (15 tests) - HTTPS enforcement with proper bypass for testing - API key validation (format, headers, authentication flow) - Database authentication logic with hash_equals validation - Permission system (read/write/read_write for HTTP methods) - User context switching and existence validation - Security edge cases (invalid credentials, missing users) ## Testing Framework Established - **Dependency Bootstrapping**: Manual loading of MCP adapter and WordPress Abilities API - **Feature Flag Testing**: Proper WordPress option-based feature management - **SSL Bypass Pattern**: Using woocommerce_mcp_allow_insecure_transport filter with clear comments - **Database Testing**: Safe API key insertion/cleanup patterns - **Permission Testing**: Reflection-based testing of static properties ## Key Testing Principles Applied - Test business logic, not external dependencies - Use proper WordPress testing patterns - Focus on edge cases and security scenarios - Clear separation between unit and integration concerns - Comprehensive coverage without over-testing **Total: 25 tests, 35+ assertions** All tests pass and validate the security, authentication, and business logic of the MCP integration without requiring actual MCP protocol connections. 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <[email protected]> * Update test to use proper McpTransportContext mock Updates WooCommerceRestTransportTest to match the corrected constructor signature after fixing the interface compatibility issue. 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <[email protected]> * Fix parameter naming and code formatting in MCP tests - Change generic $include parameter to descriptive $should_include in filter callback - Apply WordPress coding standards formatting to test files - Fix array syntax and spacing consistency - Add missing trailing newlines 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <[email protected]> --------- Co-authored-by: Claude <[email protected]>

github-actions bot added the plugin: woocommerce Issues related to the WooCommerce Core plugin. label Sep 23, 2025

budzanowski force-pushed the add/mcp-integration-tests branch from f051036 to 9645815 Compare September 23, 2025 13:27

budzanowski mentioned this pull request Sep 23, 2025

Add MCP (Model Context Protocol) integration for WooCommerce #60901

Merged

budzanowski force-pushed the add/mcp-integration-tests branch 4 times, most recently from b15a447 to d46eae7 Compare September 26, 2025 16:42

budzanowski force-pushed the add/mcp-to-woocommerce branch from a6e87b3 to ad51962 Compare September 26, 2025 16:48

budzanowski requested review from a team as code owners September 26, 2025 16:48

budzanowski requested review from kalessil and removed request for a team September 26, 2025 16:48

github-actions bot added Documentation Issues and PRs related to improving documentation focus: monorepo infrastructure Issues and PRs related to monorepo tooling. labels Sep 26, 2025

budzanowski force-pushed the add/mcp-integration-tests branch from d46eae7 to 7c38fcb Compare September 27, 2025 07:55

budzanowski and others added 3 commits September 27, 2025 12:44

budzanowski force-pushed the add/mcp-integration-tests branch from f689ad0 to cabe1e3 Compare September 27, 2025 12:50

budzanowski merged commit 95e376e into add/mcp-to-woocommerce Sep 27, 2025
18 checks passed

budzanowski deleted the add/mcp-integration-tests branch September 27, 2025 17:15

github-actions bot removed Documentation Issues and PRs related to improving documentation focus: monorepo infrastructure Issues and PRs related to monorepo tooling. labels Sep 27, 2025

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Summary

Test Coverage Added

🧪 MCPAdapterProviderTest (10 tests)

🔐 WooCommerceRestTransportTest (15 tests)

🏗️ Testing Framework Established

🎯 Testing Philosophy

🔍 Key Validations

📊 Test Results

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Testing Guidelines

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Test using WordPress Playground

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budzanowski commented Sep 23, 2025 •

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