test: improve docker-manager.ts coverage to 80%+

[Copilot]

Core components had critically low test coverage: docker-manager.ts at 27%, cli.ts at 47%. These files handle Docker orchestration and CLI entry point—the most critical paths in the codebase.

Changes

docker-manager.ts (27% → 80.27%)

Added comprehensive tests for:

• Container lifecycle: startContainers(), stopContainers() with mocked execa
• Command execution: runAgentCommand() exit code propagation, blocked domain detection from Squid access logs
• Cleanup logic: Log preservation, proxyLogsDir handling, empty directory handling
• Config generation: writeConfigs() directory creation, generateDockerCompose() DNS and proxy log options

describe('runAgentCommand', () => {
  it('should detect blocked domains from access log', async () => {
    fs.writeFileSync(
      path.join(squidLogsDir, 'access.log'),
      '1760994429.358 172.30.0.20:36274 blocked.com:443 -:- 1.1 CONNECT 403 TCP_DENIED:HIER_NONE blocked.com:443 "curl/7.81.0"\n'
    );
    mockExecaFn.mockResolvedValueOnce({ stdout: '1' } as any);
    
    const result = await runAgentCommand(testDir, ['github.com']);
    expect(result.blockedDomains).toContain('blocked.com');
  });
});

cli.ts (47.08%)

Target of 60% not fully met—lines 350-597 are the action handler using process.exit() which is difficult to unit test. However:

• Core workflow logic lives in cli-workflow.ts with 100% coverage
• All exported utility functions (parseDomains, parseDnsServers, parseVolumeMounts, etc.) are fully tested

Coverage Summary

File	Before	After	Target
docker-manager.ts	27%	80.27%	80% ✅
cli.ts	47%	47%	60% ⚠️
cli-workflow.ts	100%	100%	— ✅

Original prompt

---

This section details on the original issue you should resolve

<issue_title>[Testing] Low test coverage for core components - docker-manager.ts 18%, cli.ts 0%</issue_title>
<issue_description>## Priority
P0 - Critical (for code quality)

Summary

Core components have critically low test coverage:

• docker-manager.ts: 18% (handles all Docker orchestration)
• cli.ts: 0% (main entry point)

These are the most important files in the codebase, yet they have the least test coverage.

Current Coverage

File	Coverage	Risk Level
src/docker-manager.ts	18%	Critical - core orchestration
src/cli.ts	0%	Critical - main entry point
src/squid-config.ts	Good	Lower risk
src/host-iptables.ts	Moderate	Medium risk

Impact

• Regressions go undetected: Changes to Docker orchestration may break without tests
• Refactoring risky: Cannot safely improve code without comprehensive tests
• Bug fixes incomplete: Hard to verify fixes without test coverage
• CI false confidence: Passing CI doesn't mean core functionality works

Target Coverage

File	Current	Target
src/docker-manager.ts	18%	80%
src/cli.ts	0%	60%

Test Cases Needed

docker-manager.ts

describe('Docker Manager', () => {
  describe('container lifecycle', () => {
    it('should start squid container with correct config');
    it('should start agent container after squid is healthy');
    it('should handle squid startup failure');
    it('should handle agent startup failure');
    it('should propagate exit codes correctly');
    it('should stream logs in real-time');
  });

  describe('network configuration', () => {
    it('should create awf-net with correct subnet');
    it('should assign correct IPs to containers');
    it('should handle network creation failure');
    it('should cleanup network on exit');
  });

  describe('cleanup', () => {
    it('should stop containers on normal exit');
    it('should stop containers on SIGINT');
    it('should stop containers on error');
    it('should preserve logs when keep-containers is set');
  });

  describe('log streaming', () => {
    it('should stream stdout in real-time');
    it('should stream stderr in real-time');
    it('should handle disconnection gracefully');
  });
});

cli.ts

describe('CLI', () => {
  describe('argument parsing', () => {
    it('should parse --allow-domains correctly');
    it('should parse multiple comma-separated domains');
    it('should parse --dns-servers correctly');
    it('should reject invalid domain formats');
    it('should handle --keep-containers flag');
    it('should handle --build-local flag');
    it('should handle --image-tag flag');
  });

  describe('workflow', () => {
    it('should call writeConfigs before startContainers');
    it('should call stopContainers in finally block');
    it('should exit with agent exit code');
    it('should handle SIGINT gracefully');
    it('should handle SIGTERM gracefully');
  });

  describe('error handling', () => {
    it('should show helpful error for missing domains');
    it('should show helpful error for missing command');
    it('should cleanup on error');
  });
});

Files to Create/Modify

• Create/expand: src/docker-manager.test.ts
• Create: src/cli.test.ts
• Modify: jest.config.js - ensure coverage thresholds

Implementation Notes

• Use mocking for Docker commands (execa)
• Use Jest's mock filesystem for config files
• Test signal handling carefully (may need child processes)
• Integration tests separate from unit tests

Acceptance Criteria

• docker-manager.ts coverage ≥ 80%
• cli.ts coverage ≥ 60%
• All tests pass in CI
• No regression in existing tests</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes [Testing] Low test coverage for core components - docker-manager.ts 18%, cli.ts 0% #135

---

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[github-actions]

💥 WHOOSH! Smoke Claude springs into action on this pull request! [Panel 1 begins...]

[github-actions]

📰 BREAKING: Smoke Copilot is now investigating this pull request. Sources say the story is developing...

[github-actions]

Test Coverage Report

Metric	Coverage	Covered/Total
Lines	66.1%	708/1071
Statements	66.27%	729/1100
Functions	70.73%	87/123
Branches	60.89%	232/381

Coverage Thresholds

The project has the following coverage thresholds configured:

• Lines: 38%
• Statements: 38%
• Functions: 35%
• Branches: 30%

---

Coverage report generated by `npm run test:coverage`

[github-actions]

Smoke Test Results

Last 2 merged PRs:

• docs: streamline README for first-time visitors #111: docs: streamline README for first-time visitors
• feat(cli): add container hardening measures #96: feat(cli): add container hardening measures

Test Results:

• ✅ GitHub MCP: Retrieved PR metadata
• ✅ File Writing: Created /tmp/gh-aw/agent/smoke-test-copilot-20378116964.txt
• ✅ Bash Tool: Verified file content

Status: PASS

📰 BREAKING: Report filed by Smoke Copilot fer issue #140 🗺️

[github-actions]

Smoke Test Results

Last 2 merged PRs:

• docs: streamline README for first-time visitors #111: docs: streamline README for first-time visitors
• feat(cli): add container hardening measures #96: feat(cli): add container hardening measures

Test Results:

• ✅ GitHub MCP: Fetched PRs successfully
• ✅ File Writing: Created test file at /tmp/gh-aw/agent/smoke-test-claude-20378117039.txt
• ✅ Bash Tool: Verified file contents
• ❌ Playwright MCP: Connection failures (ERR_TUNNEL_CONNECTION_FAILED)

Overall Status: PARTIAL PASS

Note: Playwright connectivity issues detected - page navigation failed.

💥 [THE END] — Illustrated by Smoke Claude fer issue #140 🗺️