M0-M11 狩夜人笔记初始实现：11里程碑+86测试

2026-08-24 20:35:22 +08:00
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+import { describe, it, expect, beforeEach, afterEach } from 'vitest';
+import nodePath from 'node:path';
+import os from 'node:os';
+import { promises as fs } from 'node:fs';
+import { MigrationService } from '../../apps/desktop/src/main/services/migration-service';
+
+const tmp = nodePath.join(os.tmpdir(), 'dsh-mig-test');
+beforeEach(async () => { await fs.rm(tmp, { recursive: true, force: true }); await fs.mkdir(tmp, { recursive: true }); });
+afterEach(async () => { await fs.rm(tmp, { recursive: true, force: true }); });
+
+describe('M10 MigrationService 幂等保护 (FR-D2/D3)', () => {
+  it('未迁移时 isMigrated=false', async () => {
+    const m = new MigrationService(tmp);
+    expect(await m.isMigrated()).toBe(false);
+  });
+
+  it('shouldMigrate：旧数据存在 + 未迁移 + 新库空 → true', async () => {
+    const oldDir = nodePath.join(tmp, 'old'); const vault = nodePath.join(tmp, 'vault');
+    await fs.mkdir(oldDir, { recursive: true }); await fs.mkdir(vault, { recursive: true });
+    await fs.writeFile(nodePath.join(oldDir, 'data.json'), '{}');
+    const m = new MigrationService(tmp);
+    expect(await m.shouldMigrate(oldDir, vault)).toBe(true);
+  });
+
+  it('shouldMigrate：新库非空 → false', async () => {
+    const oldDir = nodePath.join(tmp, 'old'); const vault = nodePath.join(tmp, 'vault');
+    await fs.mkdir(oldDir, { recursive: true }); await fs.mkdir(vault, { recursive: true });
+    await fs.writeFile(nodePath.join(vault, 'existing.md'), 'x');
+    const m = new MigrationService(tmp);
+    expect(await m.shouldMigrate(oldDir, vault)).toBe(false);
+  });
+
+  it('迁移后标记，再次 shouldMigrate=false（幂等）', async () => {
+    const oldDir = nodePath.join(tmp, 'old'); const vault = nodePath.join(tmp, 'vault');
+    await fs.mkdir(oldDir, { recursive: true }); await fs.mkdir(vault, { recursive: true });
+    await fs.writeFile(nodePath.join(oldDir, 'd.json'), '{}');
+    const m = new MigrationService(tmp);
+    await m.migrate(oldDir, vault);
+    expect(await m.isMigrated()).toBe(true);
+    expect(await m.shouldMigrate(oldDir, vault)).toBe(false);
+  });
+
+  it('旧数据不存在 → false', async () => {
+    const m = new MigrationService(tmp);
+    expect(await m.shouldMigrate(nodePath.join(tmp, 'nope'), tmp)).toBe(false);
+  });
+});