[PM-4273] Add tests for TotpService (#7058)

Adds tests for the TOTP service in preparation for migrating it to the SDK.

libs/common/src/vault/services/totp.service.spec.ts

@@ -0,0 +1,63 @@
+import { mock } from "jest-mock-extended";
+
+import { LogService } from "../../platform/abstractions/log.service";
+import { WebCryptoFunctionService } from "../../platform/services/web-crypto-function.service";
+
+import { TotpService } from "./totp.service";
+
+describe("TotpService", () => {
+  let totpService: TotpService;
+
+  const logService = mock<LogService>();
+
+  beforeEach(() => {
+    totpService = new TotpService(new WebCryptoFunctionService(global), logService);
+
+    // TOTP is time-based, so we need to mock the current time
+    jest.useFakeTimers({
+      now: new Date("2023-01-01T00:00:00.000Z"),
+    });
+  });
+
+  afterEach(() => {
+    jest.clearAllMocks();
+    jest.useRealTimers();
+  });
+
+  it("should return null if key is null", async () => {
+    const result = await totpService.getCode(null);
+    expect(result).toBeNull();
+  });
+
+  it("should return a code if key is not null", async () => {
+    const result = await totpService.getCode("WQIQ25BRKZYCJVYP");
+    expect(result).toBe("194506");
+  });
+
+  it("should handle otpauth keys", async () => {
+    const key = "otpauth://totp/test-account?secret=WQIQ25BRKZYCJVYP";
+    const result = await totpService.getCode(key);
+    expect(result).toBe("194506");
+
+    const period = totpService.getTimeInterval(key);
+    expect(period).toBe(30);
+  });
+
+  it("should handle otpauth different period", async () => {
+    const key = "otpauth://totp/test-account?secret=WQIQ25BRKZYCJVYP&period=60";
+    const result = await totpService.getCode(key);
+    expect(result).toBe("730364");
+
+    const period = totpService.getTimeInterval(key);
+    expect(period).toBe(60);
+  });
+
+  it("should handle steam keys", async () => {
+    const key = "steam://HXDMVJECJJWSRB3HWIZR4IFUGFTMXBOZ";
+    const result = await totpService.getCode(key);
+    expect(result).toBe("7W6CJ");
+
+    const period = totpService.getTimeInterval(key);
+    expect(period).toBe(30);
+  });
+});