write test cases

Author: sarika-dev

.gitignore

@@ -22,3 +22,4 @@ dist-ssr
 *.njsproj
 *.sln
 *.sw?
+.slingshot/

src/test/App.test.js

@@ -0,0 +1,35 @@
+import React from "react";
+import { render, screen, fireEvent } from "@testing-library/react";
+import "@testing-library/jest-dom/extend-expect";
+import App from "../components/app.jsx"; // Adjust the import path as necessary
+
+test("rendersAppWithoutCrashing", () => {
+  render(<App />);
+  expect(screen.getByText(/Welcome to the App/i)).toBeInTheDocument();
+});
+
+test("displaysInitialStateCorrectly", () => {
+  render(<App />);
+  expect(screen.getByText(/Initial State/i)).toBeInTheDocument();
+});
+
+test("handlesButtonClickEvent", () => {
+  render(<App />);
+  const button = screen.getByRole("button", { name: /Click Me/i });
+  fireEvent.click(button);
+  expect(screen.getByText(/Button Clicked/i)).toBeInTheDocument();
+});
+
+test("rendersErrorMessageOnInvalidInput", () => {
+  render(<App />);
+  const input = screen.getByLabelText(/Input/i);
+  fireEvent.change(input, { target: { value: "invalid" } });
+  expect(screen.getByText(/Error: Invalid Input/i)).toBeInTheDocument();
+});
+
+test("updatesStateOnValidInput", () => {
+  render(<App />);
+  const input = screen.getByLabelText(/Input/i);
+  fireEvent.change(input, { target: { value: "valid" } });
+  expect(screen.getByText(/State Updated/i)).toBeInTheDocument();
+});