Add tests

Author: hsubox76

packages/app/src/indexeddb.test.ts

@@ -0,0 +1,57 @@
+import { expect } from 'chai';
+import '../test/setup';
+import { match, stub } from 'sinon';
+import { readHeartbeatsFromIndexedDB, writeHeartbeatsToIndexedDB } from './indexeddb';
+import { FirebaseApp } from './public-types';
+import { AppError } from './errors';
+import { HeartbeatsInIndexedDB } from './types';
+
+/**
+ * Mostly testing failure cases. heartbeatService.test.ts tests read-write
+ * more extensively.
+ */
+
+describe('IndexedDB functions', () => {
+  it('readHeartbeatsFromIndexedDB warns if IndexedDB.open() throws', async () => {
+    const warnStub = stub(console, 'warn');
+    if (typeof window !== 'undefined') {
+      // Ensure that indexedDB.open() fails in browser. It will always fail in Node.
+      stub(window.indexedDB, 'open').throws(new Error('abcd'));
+      await readHeartbeatsFromIndexedDB({
+        name: 'testname',
+        options: { appId: 'test-app-id' }
+      } as FirebaseApp
+      );
+      expect(warnStub).to.be.calledWith(match.any, match(AppError.IDB_GET));
+    } else {
+      await readHeartbeatsFromIndexedDB({
+        name: 'testname',
+        options: { appId: 'test-app-id' }
+      } as FirebaseApp
+      );
+      expect(warnStub).to.be.calledWith(match.any, match(AppError.IDB_GET));
+    }
+  });
+  it('writeHeartbeatsToIndexedDB warns if IndexedDB.open() throws', async () => {
+    const warnStub = stub(console, 'warn');
+    if (typeof window !== 'undefined') {
+      // Ensure that indexedDB.open() fails in browser. It will always fail in Node.
+      stub(window.indexedDB, 'open').throws(new Error('abcd'));
+      await writeHeartbeatsToIndexedDB({
+        name: 'testname',
+        options: { appId: 'test-app-id' }
+      } as FirebaseApp,
+        {} as HeartbeatsInIndexedDB
+      );
+      expect(warnStub).to.be.calledWith(match.any, match(AppError.IDB_WRITE));
+    } else {
+      await writeHeartbeatsToIndexedDB({
+        name: 'testname',
+        options: { appId: 'test-app-id' }
+      } as FirebaseApp,
+        {} as HeartbeatsInIndexedDB
+      );
+      expect(warnStub).to.be.calledWith(match.any, match(AppError.IDB_WRITE));
+    }
+  });
+});