test: update create update test

test/unit/create-adapter.test.ts

@@ -0,0 +1,22 @@
+import { describe, it, expect } from 'vitest'
+import { RestAdapter, RestAdapterParams } from '../../lib/adapters/REST/rest-adapter'
+import { createAdapter } from '../../lib/create-adapter'
+
+describe('createAdapter', () => {
+  it('returns adapter if provided', () => {
+    const apiAdapter = new RestAdapter({ accessToken: 'token' } as RestAdapterParams)
+
+    const createdAdapter = createAdapter({
+      apiAdapter,
+    })
+
+    expect(createdAdapter).toBe(apiAdapter)
+  })
+
+  describe('creates RestAdapter', () => {
+    it('if no apiAdapter is provided', () => {
+      const createdAdapter = createAdapter({ accessToken: 'token' })
+      expect(createdAdapter).toBeInstanceOf(RestAdapter)
+    })
+  })
+})