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tests/db-schema.test.ts

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+import { describe, it, expect, beforeEach, afterEach } from 'vitest';
+import 'fake-indexeddb/auto';
+import { MimikDB } from '../src/shared/db-schema';
+import type { Guide, Step, Screenshot } from '../src/shared/types';
+
+describe('MimikDB Schema', () => {
+  let db: MimikDB;
+
+  beforeEach(async () => {
+    db = new MimikDB();
+    await db.open();
+  });
+
+  afterEach(async () => {
+    await db.delete();
+  });
+
+  it('stores and retrieves a Guide', async () => {
+    const guide: Guide = {
+      id: crypto.randomUUID(),
+      title: 'Test Guide',
+      createdAt: Date.now(),
+      updatedAt: Date.now(),
+      stepIds: [],
+    };
+    await db.guides.add(guide);
+    const retrieved = await db.guides.get(guide.id);
+    expect(retrieved).toBeDefined();
+    expect(retrieved!.title).toBe('Test Guide');
+  });
+
+  it('stores screenshots as Blob, not string', async () => {
+    const blob = new Blob(['test'], { type: 'image/jpeg' });
+    const screenshot: Screenshot = {
+      id: crypto.randomUUID(),
+      stepId: 'step-1',
+      blob,
+      mimeType: 'image/jpeg',
+      width: 100,
+      height: 100,
+    };
+    expect(screenshot.blob).toBeInstanceOf(Blob);
+    expect(typeof screenshot.blob).not.toBe('string');
+
+    await db.screenshots.add(screenshot);
+    const retrieved = await db.screenshots.get(screenshot.id);
+    expect(retrieved).toBeDefined();
+    expect(typeof retrieved!.blob).not.toBe('string');
+  });
+
+  it('has three tables', () => {
+    expect(db.tables.map(t => t.name).sort()).toEqual(['guides', 'screenshots', 'steps']);
+  });
+});