Cypress architecture (runs in browser) - Test Execution Trace

Test Overview

This test opens a simple web page, clicks a button, and verifies that the button click changes the text on the page. It demonstrates how Cypress runs tests inside the browser and interacts with page elements.

Test Code - Cypress

Cypress

describe('Button click changes text', () => {
  it('should change text when button is clicked', () => {
    cy.visit('https://example.cypress.io/commands/actions')
    cy.get('.action-btn').first().click()
    cy.get('.action-btn').first().should('have.text', 'Clicked!')
  })
})

Execution Trace - 5 Steps

Step	Action	System State	Assertion	Result
1	Test starts	Cypress test runner initializes	-	PASS
2	Browser opens and navigates to 'https://example.cypress.io/commands/actions'	Browser shows the Cypress example actions page	-	PASS
3	Finds the first button with class '.action-btn'	Button element is located in the DOM	-	PASS
4	Clicks the found button	Button is clicked, triggering any click handlers	-	PASS
5	Checks that the button text changed to 'Clicked!'	Button text is updated in the DOM	Verify button text equals 'Clicked!'	PASS

Failure Scenario

Failing Condition: Button with class '.action-btn' is not found or text does not change after click

Execution Trace Quiz - 3 Questions

Where does Cypress run the test code?

A On a separate server outside the browser

B Inside the browser alongside the application

C Only in the command line interface

D In a mobile device emulator

Key Result

Cypress runs tests directly inside the browser, allowing it to interact with page elements in real time and verify UI changes immediately.