chore: add unit test

Author: boikoa-gl

test/unit/fpnv/index.spec.ts

@@ -0,0 +1,68 @@
+/*!
+ * @license
+ * Copyright 2025 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+'use strict';
+
+import * as chai from 'chai';
+import * as sinonChai from 'sinon-chai';
+import * as chaiAsPromised from 'chai-as-promised';
+
+import * as mocks from '../../resources/mocks';
+import { App } from '../../../src/app/index';
+import { getFirebasePnv, Fpnv } from '../../../src/fpnv/index';
+
+chai.should();
+chai.use(sinonChai);
+chai.use(chaiAsPromised);
+
+const expect = chai.expect;
+
+describe('Fpnv', () => {
+  let mockApp: App;
+  let mockCredentialApp: App;
+
+  beforeEach(() => {
+    mockApp = mocks.app();
+    mockCredentialApp = mocks.mockCredentialApp();
+  });
+
+  describe('getFirebasePnv()', () => {
+    it('should throw when default app is not available', () => {
+      expect(() => {
+        return getFirebasePnv();
+      }).to.throw('The default Firebase app does not exist.');
+    });
+
+    it('should not throw given a valid app', () => {
+      expect(() => {
+        return getFirebasePnv(mockApp);
+      }).not.to.throw();
+    });
+
+    it('should return the same instance for app instance', () => {
+      const fpnvFirst: Fpnv = getFirebasePnv(mockApp);
+      const fpnvSecond: Fpnv = getFirebasePnv(mockApp);
+      expect(fpnvFirst).to.equal(fpnvSecond);
+    });
+
+    it('should not return the same instance when different configs are provided', () => {
+      const fpnvFirst: Fpnv = getFirebasePnv(mockApp);
+      const fpnvSecond: Fpnv = getFirebasePnv(mockCredentialApp);
+      expect(fpnvFirst).to.not.equal(fpnvSecond);
+    });
+  });
+});

test/unit/index.spec.ts

@@ -123,3 +123,7 @@ import './data-connect/index.spec';
 import './data-connect/data-connect-api-client-internal.spec';
 import './data-connect/data-connect.spec';
 import './data-connect/validate-admin-args.spec';
+
+
+// Fpnv
+import './fpnv/index.spec';