Component test setup in Cypress - Test Execution Trace

Test Overview

This test sets up a simple React component in Cypress for testing. It verifies that the component renders correctly with the expected text.

Test Code - Cypress

Cypress

import React from 'react';
import { mount } from 'cypress/react18';

function Greeting({ name }) {
  return <h1>Hello, {name}!</h1>;
}

describe('Greeting component', () => {
  it('renders greeting message', () => {
    mount(<Greeting name="Alice" />);
    cy.get('h1').should('contain.text', 'Hello, Alice!');
  });
});

Execution Trace - 4 Steps

Step	Action	System State	Assertion	Result
1	Test starts	Cypress test runner is ready	-	PASS
2	Mount the Greeting component with prop name='Alice'	React component Greeting is rendered inside Cypress iframe	-	PASS
3	Find the <h1> element	The DOM contains <h1>Hello, Alice!</h1>	cy.get('h1') locates the heading element	PASS
4	Check that <h1> contains text 'Hello, Alice!'	The heading text is visible	cy.get('h1').should('contain.text', 'Hello, Alice!') verifies correct text	PASS

Failure Scenario

Failing Condition: The component does not render or the text is incorrect

Execution Trace Quiz - 3 Questions

What does the mount() function do in this test?

A It renders the React component inside Cypress for testing

B It clicks a button in the component

C It navigates to a new page

D It waits for an element to appear

Key Result

Always verify your component is properly mounted with the correct props before asserting on its rendered output in component tests.