# Task ID: 65

**Title:** Add unit tests for gating state machine

**Status:** done

**Dependencies:** 50 ✓, 52 ✓

**Priority:** high

**Description:** Create comprehensive unit tests for the session gating state machine covering all transitions and edge cases.

**Details:**

1. Add tests in `/src/mcplocal/tests/router-gating.test.ts`:
   ```typescript
   describe('Gating State Machine', () => {
     describe('initial state', () => {
       it('starts gated for gated project', () => {
         const router = createRouter({ gated: true });
         const state = router.getSessionState('session1');
         expect(state.gated).toBe(true);
       });
       
       it('starts ungated for non-gated project', () => {
         const router = createRouter({ gated: false });
         const state = router.getSessionState('session1');
         expect(state.gated).toBe(false);
       });
     });
     
     describe('begin_session transition', () => {
       it('ungates session on successful begin_session', async () => {
         const router = createGatedRouter();
         await router.handleBeginSession('session1', { tags: ['test'] });
         expect(router.getSessionState('session1').gated).toBe(false);
       });
       
       it('returns matched prompts', async () => { ... });
       it('sends notifications/tools/list_changed', async () => { ... });
     });
     
     describe('intercept transition', () => {
       it('ungates session on tool call intercept', async () => { ... });
       it('extracts keywords from tool call', async () => { ... });
       it('injects briefing with tool result', async () => { ... });
     });
     
     describe('tools/list behavior', () => {
       it('returns only begin_session while gated', async () => { ... });
       it('returns all tools + read_prompts after ungating', async () => { ... });
     });
   });
   ```

**Test Strategy:**

This task IS the test implementation. Verify:
- Initial state tests pass
- Transition tests cover happy paths
- Edge case tests (already ungated, etc.)
- Notification tests verify signals sent
- Tests use proper mocking