Makelore 2.0 initial clean snapshot

tests/unit/project-directory-initialization.test.ts

@@ -0,0 +1,40 @@
+import { copyFile, mkdir, mkdtemp, readFile, readdir, rm, writeFile } from 'node:fs/promises';
+import { tmpdir } from 'node:os';
+import { join } from 'node:path';
+import { afterEach, describe, expect, it } from 'vitest';
+import { initializeProjectDirectory } from '@electron/opencode/project-directory-initialization';
+
+const temporaryDirectories: string[] = [];
+
+afterEach(async () => {
+  await Promise.all(temporaryDirectories.splice(0).map((directory) => (
+    rm(directory, { recursive: true, force: true })
+  )));
+});
+
+describe('project directory initialization', () => {
+  it('rolls back only files and directories created by a failed in-place merge', async () => {
+    const projectPath = await mkdtemp(join(tmpdir(), 'niancode-in-place-rollback-'));
+    temporaryDirectories.push(projectPath);
+    await writeFile(join(projectPath, 'keep.txt'), 'user-owned\n', 'utf8');
+    await mkdir(join(projectPath, 'src'));
+    await writeFile(join(projectPath, 'src', 'existing.ts'), 'export const existing = true;\n', 'utf8');
+    let copyCount = 0;
+
+    await expect(initializeProjectDirectory({
+      projectPath,
+      templateId: 'standard-development',
+      allowExistingDirectory: true,
+    }, {
+      copyFile: async (source, destination, mode) => {
+        copyCount += 1;
+        if (copyCount === 2) throw new Error('simulated copy failure');
+        await copyFile(source, destination, mode);
+      },
+    })).rejects.toThrow('simulated copy failure');
+
+    expect((await readdir(projectPath)).sort()).toEqual(['keep.txt', 'src']);
+    expect(await readFile(join(projectPath, 'keep.txt'), 'utf8')).toBe('user-owned\n');
+    expect(await readFile(join(projectPath, 'src', 'existing.ts'), 'utf8')).toContain('existing');
+  });
+});