fix: recover interrupted features and allow branch switch with untracked files

apps/server/tests/unit/routes/worktree/switch-branch.test.ts

@@ -0,0 +1,106 @@
+import { describe, it, expect, vi, beforeEach, type Mock } from 'vitest';
+import type { Request, Response } from 'express';
+import { createMockExpressContext } from '../../../utils/mocks.js';
+
+vi.mock('child_process', async (importOriginal) => {
+  const actual = await importOriginal<typeof import('child_process')>();
+  return {
+    ...actual,
+    exec: vi.fn(),
+  };
+});
+
+vi.mock('util', async (importOriginal) => {
+  const actual = await importOriginal<typeof import('util')>();
+  return {
+    ...actual,
+    promisify: (fn: unknown) => fn,
+  };
+});
+
+import { exec } from 'child_process';
+import { createSwitchBranchHandler } from '@/routes/worktree/routes/switch-branch.js';
+
+const mockExec = exec as Mock;
+
+describe('switch-branch route', () => {
+  let req: Request;
+  let res: Response;
+
+  beforeEach(() => {
+    vi.clearAllMocks();
+    const context = createMockExpressContext();
+    req = context.req;
+    res = context.res;
+  });
+
+  it('should allow switching when only untracked files exist', async () => {
+    req.body = {
+      worktreePath: '/repo/path',
+      branchName: 'feature/test',
+    };
+
+    mockExec.mockImplementation(async (command: string) => {
+      if (command === 'git rev-parse --abbrev-ref HEAD') {
+        return { stdout: 'main\n', stderr: '' };
+      }
+      if (command === 'git rev-parse --verify feature/test') {
+        return { stdout: 'abc123\n', stderr: '' };
+      }
+      if (command === 'git status --porcelain') {
+        return { stdout: '?? .automaker/\n?? notes.txt\n', stderr: '' };
+      }
+      if (command === 'git checkout "feature/test"') {
+        return { stdout: '', stderr: '' };
+      }
+      return { stdout: '', stderr: '' };
+    });
+
+    const handler = createSwitchBranchHandler();
+    await handler(req, res);
+
+    expect(res.json).toHaveBeenCalledWith({
+      success: true,
+      result: {
+        previousBranch: 'main',
+        currentBranch: 'feature/test',
+        message: "Switched to branch 'feature/test'",
+      },
+    });
+    expect(mockExec).toHaveBeenCalledWith('git checkout "feature/test"', { cwd: '/repo/path' });
+  });
+
+  it('should block switching when tracked files are modified', async () => {
+    req.body = {
+      worktreePath: '/repo/path',
+      branchName: 'feature/test',
+    };
+
+    mockExec.mockImplementation(async (command: string) => {
+      if (command === 'git rev-parse --abbrev-ref HEAD') {
+        return { stdout: 'main\n', stderr: '' };
+      }
+      if (command === 'git rev-parse --verify feature/test') {
+        return { stdout: 'abc123\n', stderr: '' };
+      }
+      if (command === 'git status --porcelain') {
+        return { stdout: ' M src/index.ts\n?? notes.txt\n', stderr: '' };
+      }
+      if (command === 'git status --short') {
+        return { stdout: ' M src/index.ts\n?? notes.txt\n', stderr: '' };
+      }
+      return { stdout: '', stderr: '' };
+    });
+
+    const handler = createSwitchBranchHandler();
+    await handler(req, res);
+
+    expect(res.status).toHaveBeenCalledWith(400);
+    expect(res.json).toHaveBeenCalledWith({
+      success: false,
+      error:
+        'Cannot switch branches: you have uncommitted changes (M src/index.ts). Please commit your changes first.',
+      code: 'UNCOMMITTED_CHANGES',
+    });
+  });
+});