refactor jv-scheduler : add test cases

packages/jv-scheduler/test/components/loader/Loader.test.tsx

@@ -0,0 +1,16 @@
+import React from "react";
+import { render, screen } from "@testing-library/react";
+import "@testing-library/jest-dom";
+import Loader from "../../../src/components/loader/Loader";
+
+jest.mock("@jaspersoft/jv-ui-components", () => ({
+  JVCircularProgress: jest.fn(() => <div data-testid="circular-progress" />),
+}));
+
+describe("Loader component", () => {
+  test("renders Loader component with two JVCircularProgress elements", () => {
+    render(<Loader />);
+    const progressElements = screen.getAllByTestId("circular-progress");
+    expect(progressElements).toHaveLength(2);
+  });
+});