it blocks for test cases in Cypress - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of an it block in Cypress?

An it block defines a single test case in Cypress. It contains the steps and assertions to check if a feature works as expected.

beginner

How do you write a simple it block in Cypress?

You write it like this:

it('checks page title', () => {
  cy.visit('https://example.com')
  cy.title().should('include', 'Example')
})

This runs one test that visits a page and checks the title.

beginner

Can you have multiple it blocks inside a describe block?

Yes! A describe block groups related it blocks (test cases) together. Each it block runs independently.

beginner

What happens if an assertion inside an it block fails?

The test case fails and Cypress stops running the rest of that it block. The test report will show which it block failed and why.

beginner

Why should each it block test only one thing?

Testing one thing per it block keeps tests simple and clear. It helps find exactly what broke when a test fails, making debugging easier.

What does an it block represent in Cypress?

A A single test case

B A group of test cases

C A setup step before tests

D A cleanup step after tests

An it block defines one test case with steps and assertions.

Where do you place multiple it blocks to organize tests?

A Inside another <code>it</code> block

B Inside a <code>describe</code> block

C Outside any block

D Inside a <code>beforeEach</code> block

describe blocks group related it blocks.

What happens if an assertion fails inside an it block?

A The test case fails and stops running

B The test case passes anyway

C The whole test suite stops

D The assertion is ignored

A failed assertion causes the current it block to fail and stop.

Why is it best to test only one thing per it block?

A To skip tests easily

B To run tests faster

C To keep tests simple and easy to debug

D To avoid writing assertions

One test per it block helps find problems quickly.

Which of these is a correct it block syntax in Cypress?

A it(() => { cy.visit('/'); })

B it 'does something' { cy.visit('/'); }

C it('does something')

D it('does something', () => { cy.visit('/'); cy.get('h1').should('exist'); })

Option D shows the correct syntax with a description and a function.

Explain what an it block does in Cypress and why it is important.

Think about how you write one test in Cypress.

Describe how you organize multiple it blocks in Cypress and the benefit of this organization.

Consider how you group similar tests in a test file.

Practice

1. What is the main purpose of an it block in Cypress testing?

easy

A. To define reusable functions for tests

B. To group multiple test suites together

C. To hold and describe a single test case with its steps

D. To configure the Cypress environment settings

Solution

1. Step 1: Understand the role of it blocks

   it blocks are used to write individual test cases in Cypress.

2. Step 2: Differentiate from other blocks

   Unlike describe which groups tests, it holds one test with steps and description.

3. Final Answer:

   To hold and describe a single test case with its steps -> Option C

4. Quick Check:

   it block = single test case [OK]

Hint: Remember: it means 'this test' [OK]

Common Mistakes:

• Confusing it with describe
• Thinking it configures environment
• Using it to group multiple tests

2. Which of the following is the correct syntax to write an it block in Cypress?

easy

A. it('checks title') => cy.title().should('include', 'Home')

B. it 'checks title' { cy.title().should('include', 'Home') }

C. it: 'checks title' => { cy.title().should('include', 'Home') }

D. it('checks title', () => { cy.title().should('include', 'Home') })

Solution

1. Step 1: Check the function call syntax

   The it block requires a string description and a callback function wrapped in parentheses.

2. Step 2: Validate arrow function and braces

   it('checks title', () => { cy.title().should('include', 'Home') }) correctly uses arrow function with braces and parentheses.

3. Final Answer:

   it('checks title', () => { cy.title().should('include', 'Home') }) -> Option D

4. Quick Check:

   Correct it syntax uses parentheses and arrow function [OK]

Hint: Use parentheses and arrow function for it [OK]

Common Mistakes:

• Omitting parentheses around parameters
• Using colon or wrong arrow syntax
• Missing braces for function body

3. What will be the result of running this Cypress test?

it('checks page title', () => { cy.visit('https://example.com'); cy.title().should('eq', 'Example Domain'); });

medium

A. Test fails because cy.visit is missing a callback

B. Test passes if the page title is exactly 'Example Domain'

C. Test throws a syntax error due to missing semicolon

D. Test passes regardless of the page title

Solution

1. Step 1: Analyze the test steps

   The test visits 'https://example.com' and checks if the page title equals 'Example Domain'.

2. Step 2: Understand assertion behavior

   The assertion should('eq', 'Example Domain') passes only if the title matches exactly.

3. Final Answer:

   Test passes if the page title is exactly 'Example Domain' -> Option B

4. Quick Check:

   Correct assertion = test passes if title matches [OK]

Hint: Check exact match with should('eq', ...) [OK]

Common Mistakes:

• Assuming cy.visit needs a callback
• Ignoring assertion conditions
• Confusing semicolons with syntax errors

4. Identify the error in this it block:

it('checks button', () => { cy.get('#submit').click() cy.get('#message').should('be.visible') })

medium

A. No error; the test will run correctly

B. Missing semicolon after click() causes syntax error

C. The it block is missing a description string

D. The selector #submit is invalid

Solution

1. Step 1: Check syntax for semicolons

   JavaScript allows optional semicolons; missing one here does not cause error.

2. Step 2: Verify test structure and selectors

   The it block has a description and valid selectors; no syntax or logic errors.

3. Final Answer:

   No error; the test will run correctly -> Option A

4. Quick Check:

   Missing semicolons often allowed; test runs fine [OK]

Hint: Semicolons optional in JS; focus on logic errors [OK]

Common Mistakes:

• Assuming missing semicolon always causes error
• Confusing missing description with error
• Thinking selectors are invalid without context

5. You want to write two it blocks to test login and logout separately. Which is the best practice?

hard

A. Write two it blocks inside one describe block, each with clear descriptions

B. Write both tests inside a single it block to save time

C. Write it blocks without descriptions to keep code short

D. Use multiple describe blocks but only one it block

Solution

1. Step 1: Understand test organization

   Each it block should hold one test case with a clear description.

2. Step 2: Group related tests

   Using one describe block to group login and logout tests keeps tests organized and readable.

3. Final Answer:

   Write two it blocks inside one describe block, each with clear descriptions -> Option A

4. Quick Check:

   Separate tests in it blocks grouped by describe [OK]

Hint: Group tests with describe, separate with it [OK]

Common Mistakes:

• Combining multiple tests in one it block
• Skipping descriptions for it blocks
• Using multiple describe blocks unnecessarily