How to add E2E Tests for Nestjs graphql

NestJS GraphQL E2E testing verifies the functionality of GraphQL APIs by simulating real-world user interactions. To set up E2E testing, install necessary packages and create an E2E testing module. Write E2E tests using the `@nestjs/testing` and `supertest` libraries. Send GraphQL queries or mutations to the API and assert the correctness of responses. Run E2E tests using the `jest-circus` test runner. Use a GraphQL client for advanced testing scenarios. Consider using a testing database or mocking dependencies for isolation. Write clear and concise test cases for code coverage and maintainability. E2E testing improves the quality and reliability of NestJS GraphQL applications. By incorporating E2E testing into the development process, developers can ensure the application functions as expected.