New Test Suite: Custom Post Types & Taxonomies

[jnealey88]

Summary

Add comprehensive tests for custom post types and taxonomies - core WordPress functionality with minimal current coverage.

Current State

• Only 1 basic query test exists
• No register_post_type() tests
• No register_taxonomy() tests
• No complex query tests

Proposed Tests

Knowledge Tests

• register_post_type() arguments and defaults
• Post type REST support configuration
• Taxonomy relationship types
• Capability mapping for custom post types

Execution Tests

• register_post_type() with REST support, hierarchical settings
• register_taxonomy() with proper configuration
• Complex WP_Query with multiple meta_query relations (AND/OR)
• Term metadata operations
• Post type capabilities and permissions
• Custom columns for post type admin lists

Why This Matters

Custom post types are used in almost every WordPress project. This is fundamental knowledge for WordPress developers.