Component testing vs E2E in Cypress - Quick Revision & Key Differences

Recall & Review

beginner

What is Component Testing in Cypress?

Component Testing checks individual parts of the app, like a single button or form, to make sure they work right alone.

beginner

What does End-to-End (E2E) Testing verify?

E2E Testing checks the whole app from start to finish, like a user clicking through pages to complete a task.

intermediate

Why use Component Testing instead of E2E Testing?

Component Testing is faster and finds bugs in small parts early, while E2E tests are slower but check full user flows.

intermediate

Give an example of a test best suited for E2E Testing.

Testing if a user can log in, add items to a cart, and complete checkout is best for E2E Testing.

advanced

How do Component Testing and E2E Testing complement each other?

Component Testing ensures parts work well alone; E2E Testing ensures all parts work together for real user tasks.

Which testing type focuses on individual UI parts in Cypress?

A Component Testing

B End-to-End Testing

C Performance Testing

D Security Testing

Component Testing targets individual parts like buttons or forms.

What does E2E Testing simulate?

A A user completing full tasks in the app

B Testing a single function

C Checking code style

D Running unit tests

E2E Testing simulates real user actions across the whole app.

Which is a benefit of Component Testing over E2E Testing?

A Tests full user flows

B Faster test execution

C Requires no setup

D Runs only in production

Component tests run faster because they test small parts only.

Which test would check if a login button changes color on hover?

A Load Testing

B E2E Testing

C Component Testing

D Security Testing

Component Testing checks UI details like button behavior.

Why run both Component and E2E tests?

A To avoid writing tests

B To reduce test coverage

C To test only backend code

D To catch bugs early and verify full app behavior

Both test types together ensure quality at part and whole app levels.

Explain the main differences between Component Testing and E2E Testing in Cypress.

Think about testing small parts vs. the whole app.

Describe when you would choose Component Testing over E2E Testing and why.

Consider speed and scope of tests.