Why Cypress is built for modern web testing - Challenge Your Understanding

Challenge - 5 Problems

🧠 Conceptual

intermediate

Why does Cypress run tests directly in the browser?

Cypress runs tests inside the browser itself instead of outside like some other tools. What is the main benefit of this approach?

A It allows Cypress to have native access to DOM and network, making tests faster and more reliable.

B It requires users to install extra browser plugins to run tests.

C It restricts Cypress to only test static pages without JavaScript.

D It makes Cypress tests run slower because the browser is busy with UI rendering.

💡 Hint

Think about how running inside the browser affects test speed and control.

Cypress runs inside the browser, giving it direct access to the page's DOM and network. This makes tests faster and more reliable because it can control and observe the app like a real user.

❓ Predict Output

intermediate

What is the output of this Cypress test command?

Consider this Cypress test snippet. What will be the result of the assertion?

Cypress

cy.get('button.submit').should('be.visible').click();
cy.url().should('include', '/dashboard');

A Test passes if the button is visible and clicking it navigates to a URL containing '/dashboard'.

B Test fails because 'click()' cannot be chained after 'should()'.

C Test passes even if the button is hidden because 'be.visible' is ignored.

D Test fails because 'cy.url()' cannot be used after 'click()'.

💡 Hint

Check how Cypress chains commands and assertions.

Cypress commands are chainable. The test checks the button is visible, clicks it, then verifies the URL includes '/dashboard'. This is a common pattern and will pass if conditions are met.

❓ locator

advanced

Which locator is best for selecting a button in Cypress for modern web apps?

You want to select a submit button in a form for testing. Which locator is the best practice in Cypress for modern web testing?

A cy.get('.btn-primary')

B cy.get('button[type="submit"]')

C cy.get('button').eq(0)

D cy.get('#submit-button')

💡 Hint

Consider maintainability and reliability of selectors.

Using semantic selectors like 'button[type="submit"]' is best because it targets the button by its role, making tests more stable and readable. Class names or indexes can change and cause flaky tests.

❓ assertion

advanced

Which assertion correctly verifies a success message is visible with Cypress?

You want to check that a success message with text 'Saved successfully!' appears on the page. Which assertion is correct?

A cy.get('div').should('include.text', 'Saved successfully!');

B cy.get('.success').should('contain.text', 'Saved successfully!').and('not.exist');

C cy.get('#message').should('have.text', 'Saved successfully!').should('be.hidden');

D cy.contains('Saved successfully!').should('be.visible');

💡 Hint

Check for visibility and correct text matching.

Option D uses 'cy.contains' to find the text and asserts it is visible, which is the correct way to verify a visible success message. Other options either check for non-existence or hidden states, which are incorrect.

❓ framework

expert

Why does Cypress automatically wait for commands and assertions?

Cypress automatically retries commands and assertions until they pass or timeout. Why is this feature important for modern web testing?

A It requires developers to add manual waits to avoid flaky tests.

B It slows down tests by adding unnecessary delays before every command.

C It handles asynchronous behavior and dynamic content without needing explicit waits, making tests more stable.

D It only works with static HTML pages and fails on JavaScript-heavy apps.

💡 Hint

Think about how web pages load content dynamically.

Cypress's automatic waiting retries commands and assertions until they succeed or timeout. This helps tests handle dynamic content and asynchronous events without manual waits, improving stability and reducing flakiness.

Practice

1. What is one main reason Cypress is built specifically for modern web testing?

easy

A. It uses outdated browser automation techniques.

B. It requires manual test execution only.

C. It only supports testing on mobile devices.

D. It runs tests directly in the browser alongside the app.

Solution

1. Step 1: Understand Cypress test execution

   Cypress runs tests inside the browser where the app runs, allowing real-time interaction and faster feedback.

2. Step 2: Compare options with Cypress design

   Options A, B, and C contradict Cypress's modern approach. It supports desktop browsers, runs tests automatically, and uses modern automation.

3. Final Answer:

   It runs tests directly in the browser alongside the app. -> Option D

4. Quick Check:

   Runs tests in browser = D [OK]

Hint: Remember Cypress runs tests inside the browser itself [OK]

Common Mistakes:

• Thinking Cypress only works on mobile
• Believing tests run outside the browser
• Assuming manual test runs only

2. Which of the following is the correct way to start a Cypress test block?

easy

A. test('My test', () => { ... })

B. describe('My test', () => { ... })

C. it('My test', () => { ... })

D. run('My test', () => { ... })

Solution

1. Step 1: Recall Cypress test syntax

   Cypress uses it() to define individual test cases inside describe() blocks.

2. Step 2: Identify correct test block starter

   it() is the function to start a test case. describe() groups tests, but does not start a test itself.

3. Final Answer:

   it('My test', () => { ... }) -> Option C

4. Quick Check:

   Test case starts with it() = A [OK]

Hint: Tests start with it(), groups with describe() [OK]

Common Mistakes:

• Using test() which is not Cypress syntax
• Confusing describe() as test starter
• Using run() which does not exist

3. Given the code:

cy.visit('https://example.com')
cy.get('button').click()
cy.url().should('include', '/dashboard')

What will this test check?

medium

A. That clicking the button navigates to a URL containing '/dashboard'

B. That the button is visible on the page

C. That the page title contains 'dashboard'

D. That the button is disabled

Solution

1. Step 1: Analyze each Cypress command

   cy.visit() opens the page, cy.get('button').click() clicks the button, and cy.url().should('include', '/dashboard') asserts the URL includes '/dashboard'.

2. Step 2: Understand the assertion

   The assertion checks if after clicking the button, the URL changes to include '/dashboard', indicating navigation.

3. Final Answer:

   That clicking the button navigates to a URL containing '/dashboard' -> Option A

4. Quick Check:

   URL includes '/dashboard' after click = B [OK]

Hint: Look at the assertion on cy.url() for navigation check [OK]

Common Mistakes:

• Thinking it checks button visibility
• Confusing URL check with page title
• Assuming button is disabled

4. Identify the error in this Cypress test code:

describe('Login test', () => {
  it('logs in user', () => {
    cy.visit('https://app.com')
    cy.get('#username').type('user1')
    cy.get('#password').type('pass123')
    cy.get('button.submit').click
    cy.url().should('include', '/home')
  })
})

medium

A. Wrong selector for username input

B. Missing parentheses after click method

C. cy.visit URL is incorrect

D. Missing assertion after typing password

Solution

1. Step 1: Check method calls in the code

   The line cy.get('button.submit').click misses parentheses, so the click method is not called.

2. Step 2: Verify other parts

   Selectors and URL look valid, and assertion after typing password is not required. The main error is missing parentheses on click.

3. Final Answer:

   Missing parentheses after click method -> Option B

4. Quick Check:

   Method calls need () = A [OK]

Hint: Check all method calls have () after them [OK]

Common Mistakes:

• Ignoring missing parentheses on click
• Assuming selector is wrong without checking
• Thinking cy.visit URL is invalid

5. Why does Cypress provide real-time test results and automatic waiting, making it ideal for modern web apps?

hard

A. Because it controls the browser and app in the same run loop

B. Because it requires explicit waits for every action

C. Because it runs outside the browser and uses manual waits

D. Because it only supports static HTML pages

Solution

1. Step 1: Understand Cypress architecture

   Cypress runs inside the browser and shares the same run loop as the app, allowing it to control and observe app behavior closely.

2. Step 2: Explain real-time results and automatic waits

   This architecture lets Cypress automatically wait for elements and commands, and show test results live without manual delays.

3. Final Answer:

   Because it controls the browser and app in the same run loop -> Option A

4. Quick Check:

   Same run loop control = C [OK]

Hint: Same run loop means automatic waits and live results [OK]

Common Mistakes:

• Thinking Cypress runs outside browser
• Assuming manual waits are needed
• Believing it only supports static pages