cypress-axe for accessibility - Practice Problems & Coding Challenges

Challenge - 5 Problems

🧠 Conceptual

intermediate

What does cypress-axe primarily test for?

cypress-axe is a tool used in Cypress tests. What is its main purpose?

A To verify if CSS styles are applied correctly

B To test the speed of page loading

C To check if the web page meets accessibility standards

D To validate JavaScript syntax errors

💡 Hint

Think about what 'axe' is known for in web testing.

cypress-axe integrates the axe-core accessibility engine into Cypress tests to check for accessibility issues on web pages.

📝 Syntax

intermediate

How to inject axe-core in a Cypress test?

Which code snippet correctly injects axe-core into the current page in a Cypress test?

Cypress

cy.visit('https://example.com')
// inject axe-core here

A cy.loadAxe()

B cy.injectAxe()

C cy.injectAxeCore()

D cy.axeInject()

💡 Hint

The function name starts with 'inject' and ends with 'Axe'.

The correct command to inject axe-core is cy.injectAxe(). This prepares the page for accessibility checks.

❓ rendering

advanced

What is the output of this accessibility check?

Given this Cypress test code, what will be the result shown in the test runner if the page has no accessibility violations?

Cypress

cy.visit('https://example.com')
cy.injectAxe()
cy.checkA11y()

A Test passes with no accessibility violations reported

B Test fails with a syntax error

C Test fails due to missing axe-core injection

D Test passes but reports many accessibility violations

💡 Hint

If the page is accessible and axe-core is injected, what should happen?

If the page has no accessibility issues, cy.checkA11y() will pass silently without errors.

❓ selector

advanced

How to limit axe checks to a specific element?

Which option correctly runs accessibility checks only on the element with id 'main-content'?

Cypress

cy.visit('https://example.com')
cy.injectAxe()
// run check here

A cy.checkA11y('#main-content')

B cy.checkA11y('.main-content')

C cy.checkA11y('main-content')

D cy.checkA11y('id=main-content')

💡 Hint

Use a CSS selector for an id.

To check accessibility on a specific element by id, use the CSS selector with a hash: #main-content.

❓ accessibility

expert

What accessibility issue does this axe violation report indicate?

If cypress-axe reports a violation with the rule 'color-contrast', what does it mean?

A Form inputs are missing labels

B Images are missing alt text

C Page has no keyboard focus indicators

D Text color and background color do not have enough contrast

💡 Hint

Think about what 'color-contrast' refers to in accessibility.

The 'color-contrast' rule means the text color and background color combination is too similar, making it hard to read for some users.

Practice

1. What is the main purpose of using cypress-axe in Cypress tests?

easy

A. To generate random test data for forms

B. To speed up the loading time of web pages

C. To style elements dynamically during tests

D. To automatically find accessibility problems on web pages during tests

Solution

1. Step 1: Understand the role of cypress-axe

   cypress-axe is a tool that integrates axe accessibility checks into Cypress tests.

2. Step 2: Identify what it helps with

   It helps find accessibility issues automatically during test runs to improve web accessibility.

3. Final Answer:

   To automatically find accessibility problems on web pages during tests -> Option D

4. Quick Check:

   cypress-axe = accessibility problem detection [OK]

Hint: Remember cypress-axe finds accessibility issues automatically [OK]

Common Mistakes:

• Thinking it speeds up page loading
• Confusing it with styling tools
• Assuming it generates test data

2. Which command correctly injects axe into the page before running accessibility checks in Cypress?

easy

A. cy.runAxe()

B. cy.loadAxe()

C. cy.injectAxe()

D. cy.startAxe()

Solution

1. Step 1: Recall the cypress-axe setup command

   The official command to inject axe into the page is cy.injectAxe().

2. Step 2: Verify other options

   Other options like cy.runAxe(), cy.loadAxe(), and cy.startAxe() are not valid Cypress commands for this purpose.

3. Final Answer:

   cy.injectAxe() -> Option C

4. Quick Check:

   Inject axe = cy.injectAxe() [OK]

Hint: Use cy.injectAxe() to add axe before checks [OK]

Common Mistakes:

• Using cy.runAxe() instead of cy.injectAxe()
• Confusing command names
• Forgetting to inject axe before checking

3. Given the following Cypress test code snippet, what will cy.checkA11y() do?

cy.visit('/home')
cy.injectAxe()
cy.checkA11y()

medium

A. Run accessibility checks on the entire page and report any violations

B. Reload the page and ignore accessibility

C. Only check the header element for accessibility

D. Throw an error because cy.checkA11y() needs arguments

Solution

1. Step 1: Understand the code sequence

   The code visits the page, injects axe, then runs cy.checkA11y() without arguments.

2. Step 2: Know default behavior of cy.checkA11y()

   Without arguments, cy.checkA11y() runs accessibility checks on the whole page and reports violations.

3. Final Answer:

   Run accessibility checks on the entire page and report any violations -> Option A

4. Quick Check:

   cy.checkA11y() default = full page check [OK]

Hint: cy.checkA11y() without args checks whole page [OK]

Common Mistakes:

• Thinking it only checks part of the page
• Assuming it throws error without args
• Confusing it with page reload

4. You wrote this Cypress test:

cy.visit('/dashboard')
cy.checkA11y()

But the accessibility check does not run and no errors appear. What is missing?

medium

A. You forgot to call cy.injectAxe() before cy.checkA11y()

B. You need to add cy.wait() before cy.checkA11y()

C. You must pass a selector to cy.checkA11y()

D. You should use cy.runAxe() instead of cy.checkA11y()

Solution

1. Step 1: Identify missing axe injection

   Before running accessibility checks, axe must be injected with cy.injectAxe().

2. Step 2: Confirm correct command usage

   Without injection, cy.checkA11y() does not run properly and silently fails.

3. Final Answer:

   You forgot to call cy.injectAxe() before cy.checkA11y() -> Option A

4. Quick Check:

   Inject axe first = cy.injectAxe() [OK]

Hint: Always inject axe before checking accessibility [OK]

Common Mistakes:

• Skipping cy.injectAxe()
• Adding unnecessary cy.wait()
• Passing selector when not needed
• Using wrong command cy.runAxe()

5. You want to check accessibility only on the main content area with id main-content. Which code snippet correctly does this using cypress-axe?

hard

A. cy.checkA11y()
cy.injectAxe('#main-content')

B. cy.injectAxe()
cy.checkA11y('#main-content')

C. cy.injectAxe('#main-content')
cy.checkA11y()

D. cy.checkA11y('#main-content')
cy.injectAxe()

Solution

1. Step 1: Inject axe before checking

   First, call cy.injectAxe() without arguments to add axe to the page.

2. Step 2: Run checkA11y with selector

   Then call cy.checkA11y('#main-content') to check accessibility only inside that element.

3. Final Answer:

   cy.injectAxe() followed by cy.checkA11y('#main-content') -> Option B

4. Quick Check:

   Inject first, then check with selector [OK]

Hint: Inject axe first, then check with selector string [OK]

Common Mistakes:

• Calling checkA11y before injectAxe
• Passing selector to injectAxe
• Not injecting axe at all
• Calling injectAxe after checkA11y