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docs: update TODO.md and CLAUDE.md with test improvements
- Update test coverage from 74.35% to 78.49% - Update unit test count from 359 to 405 - Mark extension.ts refactoring as complete (93.07% coverage) - Mark test quality improvements as complete - Document comprehensive mock factory patterns - Add TDD refactoring example from extension.ts success - Update immediate next steps to focus on remote.ts 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <noreply@anthropic.com>
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‎CLAUDE.md

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@@ -32,7 +32,7 @@ Your goal is to help me arrive at the most elegant and effective solution by com
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## Test Coverage Guidelines
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Current status: **74.35% overall unit test coverage** with 359 unit tests and 69 integration tests passing.
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Current status: **78.49% overall unit test coverage** with 405 unit tests and 69 integration tests passing.
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### TDD Approach for New Features
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@@ -52,9 +52,10 @@ Current status: **74.35% overall unit test coverage** with 359 unit tests and 69
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### Testing Patterns to Follow
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- **Create factory functions** for common test setups (see test-helpers.ts)
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- **Use mock factories from test-helpers.ts** - 30+ factory functions available for all common types
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- **No inline mock definitions** - always use factory functions for consistency
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- **Minimal `as any` usage** - reduced from 95 to 4 instances (96% reduction)
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- **Use createMockOutputChannelWithLogger()** for consistent Logger testing
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- **Avoid `as any`** - create proper mock types or use `as never` for VS Code mocks
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- **Mock external dependencies** properly using vi.mock() with TypeScript types
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- **Test core functionality first** - constructor, main methods, error paths
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- **Ensure backward compatibility** by adding compatibility methods during refactoring
@@ -63,34 +64,60 @@ Current status: **74.35% overall unit test coverage** with 359 unit tests and 69
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### Test Helper Patterns
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```typescript
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// Example factory function from test-helpers.ts
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export function createMockOutputChannelWithLogger(options?: {
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verbose?: boolean;
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}): {
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mockOutputChannel: { appendLine: ReturnType<typeof vi.fn> };
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logger: Logger;
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}
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// Example factory functions from test-helpers.ts
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// Storage variants
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export function createMockStorageWithAuth(): Storage
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export function createMockStorageMinimal(): Storage
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// Workspace variants
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export function createMockWorkspaceRunning(): Workspace
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export function createMockWorkspaceStopped(): Workspace
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export function createMockWorkspaceFailed(): Workspace
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// VSCode components
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export function createMockExtensionContext(): vscode.ExtensionContext
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export function createMockRemoteSSHExtension(): vscode.Extension<unknown>
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export function createMockTreeView<T>(): vscode.TreeView<T>
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export function createMockStatusBarItem(): vscode.StatusBarItem
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export function createMockQuickPick<T>(): vscode.QuickPick<T>
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export function createMockTerminal(): vscode.Terminal
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export function createMockOutputChannel(): vscode.OutputChannel
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// Other utilities
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export function createMockWorkspaceProvider(): WorkspaceProvider
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export function createMockRemote(): Remote
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export function createMockCommands(): Commands
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export function createMockEventEmitter<T>(): vscode.EventEmitter<T>
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export function createMockAxiosInstance(): AxiosInstance
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export function createMockProxyAgent(): ProxyAgent
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export function createMockUri(path: string, scheme?: string): vscode.Uri
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```
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### Files with Excellent Coverage (>90%) - Use as Examples:
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- featureSet.ts: 100%
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- proxy.ts: 100%
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- logger.ts: 98.44% (good TDD example)
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- sshSupport.ts: 98.13%
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- util.ts: 97.31%
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- headers.ts: 96.49%
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- api-helper.ts: 96.36%
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- sshConfig.ts: 96.21%
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- api.ts: 95.52%
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- extension.ts: 93.07% (refactored from 39.71% using TDD)
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- workspaceMonitor.ts: 92.37%
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- error.ts: 90.44%
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- cliManager.ts: 90.05%
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### Current Development Approach
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- **TDD for new features** - test first, implement second
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- **Incremental refactoring** - small, measurable improvements
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- **Backward compatibility** - add compatibility methods when changing interfaces
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- **Factory functions in test-helpers.ts** - reusable test setup patterns
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- **Systematic cleanup** - remove `as any` casts, add proper types
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- **Comprehensive mock factories** - 30+ factory functions in test-helpers.ts
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- **No inline mocks** - all test mocks use factory functions
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- **Type-safe testing** - minimal `as any` usage (only 4 instances remain)
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- **Measure progress constantly** - run `yarn test:ci --coverage` after every change
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### Refactoring Strategy
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3. Incrementally replace usage starting with highest-impact files
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4. Maintain full test suite passing throughout
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### Example: Logger Integration Pattern
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### Example: TDD Refactoring Pattern (extension.ts success story)
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```typescript
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// 1. Add backward compatibility to new class
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class Logger {
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// ... new methods ...
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// Backward compatibility for legacy code
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writeToCoderOutputChannel(message: string): void {
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this.info(message);
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// 1. Write test for extracted function FIRST
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describe("setupRemoteSSHExtension", () => {
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it("should configure remote SSH when available", () => {
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const mockExtension = createMockRemoteSSHExtension();
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const mockRemote = createMockRemote();
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const result = setupRemoteSSHExtension(mockExtension);
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expect(result).toBe(mockRemote);
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});
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});
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// 2. Extract function to make test pass
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export function setupRemoteSSHExtension(
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remoteSSHExtension: vscode.Extension<unknown> | undefined,
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): Remote | undefined {
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if (!remoteSSHExtension) {
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return undefined;
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}
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// Implementation here
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}
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// 2. Create factory in test-helpers.ts
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export function createMockOutputChannelWithLogger() {
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const mockOutputChannel = { appendLine: vi.fn() };
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const logger = new Logger(mockOutputChannel);
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return { mockOutputChannel, logger };
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}
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// 3. Replace in original code
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const remoteSSHExtension = vscode.extensions.getExtension("ms-vscode-remote.remote-ssh");
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const remote = setupRemoteSSHExtension(remoteSSHExtension);
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// 3. Test compatibility before refactoring
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it("should be backward compatible", () => {
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const { mockOutputChannel, logger } = createMockOutputChannelWithLogger();
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logger.writeToCoderOutputChannel("Test");
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expect(mockOutputChannel.appendLine).toHaveBeenCalledWith(
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expect.stringMatching(/\[.*\] \[INFO\] Test/)
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);
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});
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// Result: extension.ts coverage improved from 39.71% to 93.07%
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```

‎TODO.md

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## Phase 1: Test Infrastructure & Coverage ✅ COMPLETED
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- **359 unit tests** passing with 74.35% overall coverage
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- **405 unit tests** passing with 78.49% overall coverage
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- **69 integration tests** passing
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- **18 files** with >90% coverage
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- Established TDD workflow and testing patterns
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## Phase 3: Code Quality Improvements
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### Test Quality
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### Test Quality ✅ COMPLETED
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- [x] test-helpers.ts with type-safe mock builders
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- [x] Removed most `as any` casts from tests
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- [ ] api.test.ts cleanup (30+ `as any` with eslint-disable)
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- [ ] Fix private property access in remaining test files
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- [x] test-helpers.ts with comprehensive mock factories (30+ factory functions)
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- [x] Reduced `as any` casts from 95 to 4 (96% reduction)
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- [x] api.test.ts cleanup - removed eslint-disable and all inline mocks
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- [x] Consolidated all test mocks into reusable factory functions
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- [x] Migrated all test files to use consistent mock patterns
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### Refactoring Priority
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1. **extension.ts** (39.71% → 81.51% coverage ✅) - Break down monolithic activate() function
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1. **extension.ts** (39.71% → 93.07% coverage ✅ COMPLETED) - Refactored monolithic activate() function
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Extract these helper functions (TDD - write tests first):
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Successfully extracted all 9 helper functions using TDD:
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- [x] setupRemoteSSHExtension() - Configure remote SSH extension
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- [x] initializeInfrastructure() - Create storage and logger
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- [x] registerUriHandler() - Handle vscode:// URIs
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- [x] registerCommands() - Register all VS Code commands
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- [x] handleRemoteEnvironment() - Setup remote workspace if needed
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- [ ] checkAuthentication() - Verify user auth and fetch workspaces
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- [ ] handleAutologin() - Process autologin configuration
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Approach: Extract one function at a time, add tests, maintain passing suite
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- [x] checkAuthentication() - Verify user auth and fetch workspaces
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- [x] handleAutologin() - Process autologin configuration
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2. **remote.ts** (49.21% coverage) - break down 400+ line methods
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3. **commands.ts** (64.19% coverage) - create UI abstraction layer
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| Metric | Target | Current | Status |
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| ------------------------ | ------ | ------- | ----------- |
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| Unit test coverage | 80%+ | 78.15% | 🔄 Progress |
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| Unit test coverage | 80%+ | 78.49% | 🔄 Progress |
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| Integration tests | 60+ | 69 | ✅ Complete |
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| Logger adoption | 100% | 100% | ✅ Complete |
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| Files with <50% coverage | 0 | 1 | 🔄 Progress |
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| Test mock consolidation | 100% | 100% | ✅ Complete |
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## Immediate Next Steps
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1. **Refactor extension.ts using TDD**
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- Start with setupRemoteSSHExtension() - write test first
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- Continue with initializeInfrastructure() and other functions
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- Run `yarn test:ci --coverage` after each extraction
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- Target: 39.71% → 60%+ coverage
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1. **Refactor remote.ts (49.21% coverage)**
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- Break down 400+ line methods into testable units
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- Apply TDD approach similar to extension.ts
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- Target: 49.21% → 80%+ coverage
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2. **Clean up api.test.ts**
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- Remove eslint-disable comment
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- Create proper mock types for 30+ `as any` casts
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- Consider exposing test interfaces for better type safety
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2. **Improve commands.ts coverage (68.03%)**
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- Create UI abstraction layer for better testability
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- Add tests for uncovered command handlers
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- Target: 68.03% → 80%+ coverage

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