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# src/factories/session-store-factory.ts @source-hash: d9739a93268d6058 @generated: 2026-02-10T00:41:44Z ## Factory Pattern for SessionStore Creation Implements the factory pattern to create `SessionStore` instances with dependency injection support and testing capabilities. ### Core Components **ISessionStoreFactory Interface (L10-12)** - Abstract factory interface with single `create()` method - Returns `SessionStore` instances - Enables polymorphic factory usage **SessionStoreFactory Class (L17-21)** - Production factory implementation - Creates standard `SessionStore` instances via constructor - Primary entry point for application code **MockSessionStoreFactory Class (L26-34)** - Testing-focused factory implementation - Creates `MockSessionStore` instances instead of production ones - Tracks all created stores in `createdStores` array for test verification - Enables test isolation and mock injection **MockSessionStore Class (L40-55)** - Test double that extends real `SessionStore` for compatibility - Adds call tracking for `createSession()` method (L51-54) - Stores method invocations in `createSessionCalls` array with parameters - Maintains behavioral consistency while enabling test assertions ### Dependencies - `SessionStore` and `CreateSessionParams` from `../session/session-store.js` ### Architectural Patterns - **Factory Pattern**: Abstracts object creation behind interface - **Dependency Injection**: Enables runtime factory swapping - **Test Double**: Mock extends real class for drop-in replacement - **Call Tracking**: Spy pattern for testing method invocations ### Usage Context Production code uses `SessionStoreFactory`, tests inject `MockSessionStoreFactory` to control and verify session store interactions.