Add simple unit test

src/targets/__tests__/registry.test.ts

@@ -0,0 +1,35 @@
+import { RegistryConfig, RegistryTarget } from '../registry';
+import { NoneArtifactProvider } from '../../artifact_providers/none';
+import { RegistryPackageType } from '../../utils/registry';
+
+describe('getUpdatedManifest', () => {
+  const target = new RegistryTarget(
+    { name: 'pypi' },
+    new NoneArtifactProvider(),
+    { owner: 'testSourceOwner', repo: 'testSourceRepo' }
+  );
+
+  it('check if createdAt exists', async () => {
+    const registryConfig: RegistryConfig = {
+      type: RegistryPackageType.SDK,
+      canonicalName: 'example-package',
+    };
+    const packageManifest = {
+      canonical: 'example-package',
+    };
+    const canonical = 'example-package';
+    const version = '1.2.3';
+    const revision = 'abc123';
+
+    const updatedManifest = await target.getUpdatedManifest(
+      registryConfig,
+      packageManifest,
+      canonical,
+      version,
+      revision
+    );
+
+    // check if property createdAt exists
+    expect(updatedManifest).toHaveProperty('createdAt');
+  });
+});