MCP Debugger

# tests/test-utils/mocks/mock-logger.ts @source-hash: 20965784c00bd3ac @generated: 2026-02-10T00:41:27Z ## Purpose Test utility providing mock logger implementations for test isolation and debugging. ## Key Functions **createMockLogger(logLevel?: string): ILogger (L12-24)** - Creates fully stubbed logger with Vitest mocks for all methods - Default logLevel 'debug', attached as dynamic property for test assertions - Returns silent mock suitable for unit tests requiring logger injection **createSpyLogger(): ILogger (L31-38)** - Creates spy logger that both records calls AND outputs to console - Useful for test debugging when you need to see actual log output - Each method wraps console output with prefixed log level tags ## Dependencies - `vitest` - Uses `vi.fn()` for creating mock/spy functions - `ILogger` interface from `../../src/interfaces/external-dependencies.js` - Defines logger contract with info/error/debug/warn methods ## Architecture Notes - Two distinct mocking strategies: silent vs. observable - Type casting used for dynamic level property attachment (L21) - Console methods directly mapped to corresponding log levels for realistic debugging experience ## Usage Patterns - `createMockLogger()` for isolation testing where log output is irrelevant - `createSpyLogger()` for integration tests or debugging where log visibility is needed - Both return same interface, making them interchangeable in test scenarios