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You want to test a React component that fetches data on mount and displays it. Which approach is best in Cypress?

hard📝 Application Q8 of 15
Cypress - Component Testing
You want to test a React component that fetches data on mount and displays it. Which approach is best in Cypress?
AUse E2E testing and rely on real backend data
BUse component testing with cy.mount() and mock the fetch call
CUse component testing without mocking fetch
DUse E2E testing but skip network requests
Step-by-Step Solution
Solution:

  1. Step 1: Understand component testing with data fetching

    Component tests should isolate component and mock external calls like fetch.

  2. Step 2: Compare with E2E testing

    E2E tests use real backend but are slower and less isolated.

  3. Final Answer:

    Use component testing with cy.mount() and mock the fetch call -> Option B

  4. Quick Check:

    Mock fetch in component tests for isolation [OK]
Quick Trick: Mock network calls in component tests for speed [OK]
Common Mistakes:
  • Using real backend in component tests
  • Not mocking fetch causing flaky tests
  • Skipping network requests in E2E tests

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