Allow common get and set operations from state providers (#7824)

* Allow common get and set operations from state providers

* Use finnish endings for observables

libs/common/src/platform/state/implementations/default-active-user-state.provider.spec.ts

@@ -0,0 +1,43 @@
+import { mock } from "jest-mock-extended";
+
+import { mockAccountServiceWith, trackEmissions } from "../../../../spec";
+import { AuthenticationStatus } from "../../../auth/enums/authentication-status";
+import { UserId } from "../../../types/guid";
+import {
+  AbstractMemoryStorageService,
+  AbstractStorageService,
+  ObservableStorageService,
+} from "../../abstractions/storage.service";
+
+import { DefaultActiveUserStateProvider } from "./default-active-user-state.provider";
+
+describe("DefaultActiveUserStateProvider", () => {
+  const memoryStorage = mock<AbstractMemoryStorageService & ObservableStorageService>();
+  const diskStorage = mock<AbstractStorageService & ObservableStorageService>();
+  const userId = "userId" as UserId;
+  const accountInfo = {
+    id: userId,
+    name: "name",
+    email: "email",
+    status: AuthenticationStatus.Locked,
+  };
+  const accountService = mockAccountServiceWith(userId, accountInfo);
+  let sut: DefaultActiveUserStateProvider;
+
+  beforeEach(() => {
+    sut = new DefaultActiveUserStateProvider(accountService, memoryStorage, diskStorage);
+  });
+
+  afterEach(() => {
+    jest.resetAllMocks();
+  });
+
+  it("should track the active User id from account service", () => {
+    const emissions = trackEmissions(sut.activeUserId$);
+
+    accountService.activeAccountSubject.next(undefined);
+    accountService.activeAccountSubject.next(accountInfo);
+
+    expect(emissions).toEqual([userId, undefined, userId]);
+  });
+});