test(unit): add example

tests/unit/example.test.ts

@@ -0,0 +1,10 @@
+import { describe, expect, it } from 'vitest'
+
+describe('simple example test suite', () => {
+  it('should always pass', () => {
+    expect(true).toBe(true)
+  })
+  it('another test to always pass', () => {
+    expect(2 + 2).toBe(4)
+  })
+})

vitest.config.ts

@@ -0,0 +1,11 @@
+import { defineConfig } from 'vitest/config'
+
+// TODO: refactor after monorepo migration
+// see: https://vitest.dev/guide/workspace.html
+export default defineConfig({
+  test: {
+    include: ['tests/unit/**/*.ts'],
+    name: 'example',
+    environment: 'node',
+  },
+})