From 85a3d274e6ef657b8bd24f0840e2b6331c24c00e Mon Sep 17 00:00:00 2001
From: Anton <vakabunga@proton.me>
Date: Wed, 4 Mar 2026 14:55:33 +0300
Subject: [PATCH] test: add Vitest config and test utils

Made-with: Cursor
---
 tests/setup.ts      |  5 ++++
 tests/smoke.test.ts | 12 +++++++++
 tests/test-utils.ts | 61 +++++++++++++++++++++++++++++++++++++++++++++
 vitest.config.ts    | 28 +++++++++++++++++++++
 4 files changed, 106 insertions(+)
 create mode 100644 tests/setup.ts
 create mode 100644 tests/smoke.test.ts
 create mode 100644 tests/test-utils.ts
 create mode 100644 vitest.config.ts

diff --git a/tests/setup.ts b/tests/setup.ts
new file mode 100644
index 0000000..a9fe784
--- /dev/null
+++ b/tests/setup.ts
@@ -0,0 +1,5 @@
+import { beforeAll, vi } from 'vitest';
+
+beforeAll(() => {
+  vi.stubEnv('NODE_ENV', 'test');
+});
diff --git a/tests/smoke.test.ts b/tests/smoke.test.ts
new file mode 100644
index 0000000..08fc400
--- /dev/null
+++ b/tests/smoke.test.ts
@@ -0,0 +1,12 @@
+import { describe, it, expect } from 'vitest';
+import { createMockDb } from './test-utils.js';
+
+describe('test-utils', () => {
+  it('createMockDb returns mock with select, insert, update, delete', () => {
+    const db = createMockDb();
+    expect(db.select).toBeDefined();
+    expect(db.insert).toBeDefined();
+    expect(db.update).toBeDefined();
+    expect(db.delete).toBeDefined();
+  });
+});
diff --git a/tests/test-utils.ts b/tests/test-utils.ts
new file mode 100644
index 0000000..b411efb
--- /dev/null
+++ b/tests/test-utils.ts
@@ -0,0 +1,61 @@
+import { vi } from 'vitest';
+import type { FastifyInstance } from 'fastify';
+import type { NodePgDatabase } from 'drizzle-orm/node-postgres';
+import type * as schema from '../src/db/schema/index.js';
+
+export type MockDb = {
+  select: ReturnType<NodePgDatabase<typeof schema>['select']>;
+  insert: ReturnType<NodePgDatabase<typeof schema>['insert']>;
+  update: ReturnType<NodePgDatabase<typeof schema>['update']>;
+  delete: ReturnType<NodePgDatabase<typeof schema>['delete']>;
+};
+
+/**
+ * Create a chainable mock for Drizzle DB operations.
+ * Configure chain terminals (limit, returning) to resolve to desired values.
+ * Example: mockDb.select.mockReturnValue({ from: vi.fn().mockReturnValue({ where: vi.fn().mockReturnValue({ limit: vi.fn().mockResolvedValue([user]) }) }) })
+ */
+export function createMockDb(): MockDb {
+  const chain = {
+    from: vi.fn().mockReturnThis(),
+    where: vi.fn().mockReturnThis(),
+    values: vi.fn().mockReturnThis(),
+    set: vi.fn().mockReturnThis(),
+    orderBy: vi.fn().mockReturnThis(),
+    limit: vi.fn().mockReturnThis(),
+    returning: vi.fn().mockReturnThis(),
+  };
+
+  return {
+    select: vi.fn().mockReturnValue(chain),
+    insert: vi.fn().mockReturnValue(chain),
+    update: vi.fn().mockReturnValue(chain),
+    delete: vi.fn().mockReturnValue(chain),
+  } as unknown as MockDb;
+}
+
+/**
+ * Create a minimal mock Fastify app with db for route/integration tests.
+ * Use buildApp() from app.ts for full integration tests.
+ */
+export function createMockApp(): FastifyInstance & { db: MockDb } {
+  return {
+    db: createMockDb(),
+    log: {
+      child: () => ({
+        debug: () => {},
+        info: () => {},
+        warn: () => {},
+        error: () => {},
+        trace: () => {},
+        fatal: () => {},
+      }),
+      debug: () => {},
+      info: () => {},
+      warn: () => {},
+      error: () => {},
+      trace: () => {},
+      fatal: () => {},
+    },
+  } as FastifyInstance & { db: MockDb };
+}
diff --git a/vitest.config.ts b/vitest.config.ts
new file mode 100644
index 0000000..6f73b43
--- /dev/null
+++ b/vitest.config.ts
@@ -0,0 +1,28 @@
+import { defineConfig } from 'vitest/config';
+import { resolve } from 'path';
+
+export default defineConfig({
+  test: {
+    globals: true,
+    environment: 'node',
+    include: ['tests/**/*.test.ts', 'tests/**/*.spec.ts'],
+    coverage: {
+      provider: 'v8',
+      reporter: ['text', 'json', 'lcov'],
+      include: ['src/services/**/*.ts'],
+      exclude: [
+        'src/services/**/*.d.ts',
+        '**/*.test.ts',
+        '**/*.spec.ts',
+        '**/index.ts',
+      ],
+    },
+    setupFiles: ['tests/setup.ts'],
+    testTimeout: 10000,
+  },
+  resolve: {
+    alias: {
+      '@': resolve(__dirname, 'src'),
+    },
+  },
+});