How do you perform assertions in Cypress?

In Cypress, assertions are how you check that something is true during your test—like checking if a button exists, a value is correct, or a page has loaded properly. Cypress uses Chai, Sinon, and jQuery assertions under the hood, and it integrates them with commands like should() and expect().

Using .should() (Most Common), This is chained directly onto Cypress commands.

Using expect(): This is used when working with variables or custom logic.

Common Assertions Examples:

1
Text exists : cy.contains('Login Successful')
2
Element is visible: cy.get('.alert').should('be.visible')
3
Class or attribute check: cy.get('button').should('have.class', 'primary')
4
URL or title check: cy.url().should('include', '/home')
5
Value in input field: cy.get('#name').should('have.value', 'John')
6
Checkbox is checked: cy.get('#subscribe').should('be.checked')

Common Assertions Examples:

1
Assertions automatically wait for the condition to be true (up to default timeout).
2
You can chain multiple assertions