NestJS Testing

Write NestJS tests following Sellernote's 3-layer architecture and convention documents.

Convention Loading

Before starting any work, Read the relevant reference files from references/ within this skill directory:

1. Always read first (core rules):

   • references/BACKEND_CONVENTION.md - 3-layer architecture, DTO/Entity naming, test strategy, test pyramid, anti-patterns
   • references/NESTJS_CONVENTION.md - Project structure, DI patterns, module config, Domain Model Interface, money handling, DTO validation with @sellernote/sellernote-nestjs-api-property, exception handling

2. Read when relevant:

   • references/BACKEND_ARCHITECTURE_CONVENTION.md - Layer responsibility matrix (what each layer may/must not do), repository allowed/prohibited patterns, monorepo dependency direction, anti-patterns (Fat Repository, Anemic Service)
   • references/COMMON_CONVENTION.md - Naming conventions, error code format ({DOMAIN}_{CATEGORY}_{DETAIL}), error response format, logging
   • references/TYPESCRIPT_CONVENTION.md - Type system, import ordering, enum/union conventions, anti-patterns

Workflow