brain/tools/subagent-prompt-prefix-h10.test.mjs

// tools/subagent-prompt-prefix-h10.test.mjs
// Stream H Task 10 — worktree-bootstrap helper tests (vitest, separate file
// because subagent-prompt-prefix.test.mjs is in vitest config exclude list
// and uses node:test for subprocess-style runs).
import { describe, it, expect } from 'vitest';
import { detectWorktreeMode, buildSetupBlock } from './subagent-prompt-prefix.mjs';

describe('detectWorktreeMode (Stream H Task 10)', () => {
  it('returns isWorktree=false when cwd .git is the same as common dir', () => {
    const r = detectWorktreeMode({
      cwd: 'c:/repo',
      gitDir: 'c:/repo/.git',
      gitCommonDir: 'c:/repo/.git',
    });
    expect(r.isWorktree).toBe(false);
    expect(r.parentRepoRoot).toBeNull();
  });

  it('returns isWorktree=true when cwd is a linked worktree', () => {
    const r = detectWorktreeMode({
      cwd: 'c:/parent/v4-stream-A',
      gitDir: 'c:/parent/.git/worktrees/v4-stream-A',
      gitCommonDir: 'c:/parent/.git',
    });
    expect(r.isWorktree).toBe(true);
    expect(r.parentRepoRoot).toBe('c:/parent');
  });

  it('handles null inputs gracefully', () => {
    expect(detectWorktreeMode({}).isWorktree).toBe(false);
    expect(detectWorktreeMode({ cwd: null, gitDir: null, gitCommonDir: null }).isWorktree).toBe(false);
  });

  it('handles different separators (backslashes) for parentRepoRoot extraction', () => {
    const r = detectWorktreeMode({
      cwd: 'c:/parent/wt-X',
      gitDir: 'c:\\parent\\.git\\worktrees\\wt-X',
      gitCommonDir: 'c:\\parent\\.git',
    });
    expect(r.isWorktree).toBe(true);
    expect(r.parentRepoRoot).toBe('c:/parent');
  });
});

describe('buildSetupBlock (Stream H Task 10)', () => {
  it('returns empty string when not in a worktree', () => {
    expect(buildSetupBlock({ isWorktree: false, parentRepoRoot: null })).toBe('');
  });

  it('returns a SETUP — worktree bootstrap block when in a worktree (win32)', () => {
    const s = buildSetupBlock({
      isWorktree: true,
      parentRepoRoot: 'c:/parent',
      platform: 'win32',
    });
    expect(s).toContain('SETUP — worktree bootstrap');
    expect(s).toContain('mklink /D vendor');
    expect(s).toContain('c:/parent/app/vendor');
    expect(s).toContain('storage/framework');
  });

  it('returns a SETUP block with ln -s on linux/darwin', () => {
    const s = buildSetupBlock({
      isWorktree: true,
      parentRepoRoot: '/home/u/repo',
      platform: 'linux',
    });
    expect(s).toContain('SETUP — worktree bootstrap');
    expect(s).toContain('ln -s');
    expect(s).toContain('/home/u/repo/app/vendor');
  });

  it('mentions mkdir for cache/sessions/views/testing dirs', () => {
    const s = buildSetupBlock({
      isWorktree: true,
      parentRepoRoot: 'c:/parent',
      platform: 'win32',
    });
    expect(s).toContain('cache');
    expect(s).toContain('sessions');
    expect(s).toContain('views');
    expect(s).toContain('testing');
  });

  it('returns empty when isWorktree=true but parentRepoRoot missing', () => {
    expect(buildSetupBlock({ isWorktree: true, parentRepoRoot: null })).toBe('');
  });
});