Parent commands in Cypress - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a parent command in Cypress?

A parent command is a Cypress command that starts a chain of commands. It selects elements or triggers actions and returns a subject for further commands.

beginner

How does the cy.get() command act as a parent command?

cy.get() selects elements from the page and returns them as a subject for chaining more commands like .click() or .should().

beginner

Why are parent commands important in Cypress test scripts?

Parent commands start the command chain and provide the elements or context needed for child commands to work on, enabling clear and readable tests.

beginner

Example: What does this Cypress code do?

cy.get('button').click()

It uses the parent command cy.get('button') to find all button elements, then clicks the first button found using the child command .click().

intermediate

Can a parent command be chained with multiple child commands? Give an example.

Yes. For example:

cy.get('input').type('hello').should('have.value', 'hello')

The parent command cy.get('input') selects the input, then child commands type text and check the value.

Which of these is a parent command in Cypress?

A .click()

B cy.get()

C .should()

D .type()

cy.get() is a parent command that starts a chain by selecting elements. The others are child commands that act on the selected elements.

What does a parent command return in Cypress?

A A subject for chaining more commands

B A new browser window

C An error message

D A screenshot

Parent commands return a subject (like elements) so you can chain child commands to perform actions or assertions.

Which command chain is correct in Cypress?

A cy.click().get('button')

B click().get('button')

C cy.get('button').click()

D .click().cy.get('button')

You must start with a parent command like cy.get() before chaining child commands like .click().

What happens if you try to use a child command without a parent command first?

A Test passes automatically

B Test runs normally

C Test skips the command

D Cypress throws an error

Child commands need a subject from a parent command. Without it, Cypress will throw an error.

Which of these is NOT a parent command in Cypress?

A .click()

B cy.get()

C cy.visit()

D cy.contains()

.click() is a child command that acts on elements selected by a parent command.

Explain what a parent command is in Cypress and why it is necessary.

Think about how Cypress finds elements to work with.

Describe how you would use a parent command and child commands together in a simple test.

Imagine clicking a button after finding it.

Practice

1. What does the Cypress parent() command do?

easy

A. It finds the direct parent element of the current element.

B. It finds all child elements inside the current element.

C. It clicks on the current element.

D. It waits for the element to appear on the page.

Solution

1. Step 1: Understand the purpose of parent()

   The parent() command in Cypress is used to get the immediate parent of the selected element in the DOM tree.

2. Step 2: Compare with other options

   Options A, B, and D describe different commands or actions unrelated to parent(). Only It finds the direct parent element of the current element. correctly describes the direct parent selection.

3. Final Answer:

   It finds the direct parent element of the current element. -> Option A

4. Quick Check:

   parent() = direct parent element [OK]

Hint: Remember: parent() gets one level up in the DOM tree [OK]

Common Mistakes:

• Confusing parent() with children()
• Thinking parent() clicks the element
• Assuming parent() waits for elements

2. Which of the following is the correct syntax to get the parent of an element with class child-item in Cypress?

easy

A. cy.get('.child-item').children();

B. cy.get('.child-item').parents();

C. cy.get('.child-item').parent('.parent-item');

D. cy.get('.child-item').parent();

Solution

1. Step 1: Identify the basic parent command syntax

   The basic syntax to get the direct parent is cy.get(selector).parent();. This returns the immediate parent element.

2. Step 2: Analyze options

   cy.get('.child-item').parents(); uses parents() which gets all ancestors, not just the direct parent. cy.get('.child-item').parent('.parent-item'); filters the direct parent to only those matching '.parent-item', but the question does not specify the parent's class. cy.get('.child-item').children(); gets children, not parent.

3. Final Answer:

   cy.get('.child-item').parent(); -> Option D

4. Quick Check:

   Correct syntax = cy.get(...).parent() [OK]

Hint: Use parent() without arguments for direct parent [OK]

Common Mistakes:

• Using parents() instead of parent()
• Trying to pass selector directly inside parent() incorrectly
• Confusing children() with parent()

3. What will the following Cypress code select?

cy.get('.list-item').parent('.list-container').should('have.class', 'active');

medium

A. All parents of '.list-item' with class 'list-container' regardless of other classes.

B. The direct parent of '.list-item' that has class 'list-container' and also has class 'active'.

C. The child elements of '.list-item' with class 'active'.

D. The '.list-item' elements themselves if they have class 'active'.

Solution

1. Step 1: Understand the parent() with selector

   The parent('.list-container') command filters the direct parent to only those with class list-container.

2. Step 2: Understand the assertion

   The should('have.class', 'active') asserts that the selected parent element also has the class active.

3. Final Answer:

   The direct parent of '.list-item' that has class 'list-container' and also has class 'active'. -> Option B

4. Quick Check:

   parent(selector) filters direct parent [OK]

Hint: parent(selector) filters direct parent by selector [OK]

Common Mistakes:

• Thinking parents() selects only direct parent
• Confusing child elements with parent elements
• Ignoring the filter selector in parent()

4. You wrote this Cypress code but it fails:

cy.get('.button').parent('.container').click();

What is the likely cause of the failure?

medium

A. The parent element with class 'container' does not exist directly above '.button'.

B. The parent() command cannot be chained with click().

C. The selector '.button' is invalid.

D. You must use parents() instead of parent().

Solution

1. Step 1: Check the parent selector usage

   The parent('.container') filters the direct parent to only those with class 'container'. If no direct parent matches, the command yields no element.

2. Step 2: Understand why click() fails

   Since no element is found, click() fails because it has nothing to act on.

3. Final Answer:

   The parent element with class 'container' does not exist directly above '.button'. -> Option A

4. Quick Check:

   parent(selector) fails if no direct parent matches [OK]

Hint: Check if direct parent matches selector before chaining actions [OK]

Common Mistakes:

• Assuming parent() always finds an element
• Thinking click() can't chain after parent()
• Using parents() unnecessarily

5. You want to verify that a button with class submit-btn is inside a form with class user-form. Which Cypress code correctly checks the form is the direct parent of the button?

hard

A. cy.get('.user-form').children('.submit-btn').should('exist');

B. cy.get('.submit-btn').parents('form.user-form').should('exist');

C. cy.get('.submit-btn').parent('form.user-form').should('exist');

D. cy.get('.submit-btn').parent().should('have.class', 'user-form');

Solution

1. Step 1: Understand direct parent check

   To check if the direct parent matches a selector, use parent(selector). cy.get('.submit-btn').parent('form.user-form').should('exist'); uses this correctly.

2. Step 2: Compare other options

   cy.get('.submit-btn').parents('form.user-form').should('exist'); checks all ancestors, not just direct parent. cy.get('.user-form').children('.submit-btn').should('exist'); checks children of the form, reversed logic. cy.get('.submit-btn').parent().should('have.class', 'user-form'); checks parent but does not filter by selector, so it may pass incorrectly.

3. Final Answer:

   cy.get('.submit-btn').parent('form.user-form').should('exist'); -> Option C

4. Quick Check:

   parent(selector) verifies direct parent matches selector [OK]

Hint: Use parent(selector) to confirm direct parent matches [OK]

Common Mistakes:

• Using parents() when only direct parent matters
• Checking children instead of parent
• Not filtering parent by selector