Why assertions verify expected behavior in Cypress - Test Execution Impact

Test Overview

This test opens a simple webpage, clicks a button, and verifies that the button text changes as expected. The assertion checks that the expected behavior occurs after the click.

Test Code - Cypress

Cypress

describe('Button click changes text', () => {
  it('should change button text after click', () => {
    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	Test runner initialized, no browser opened yet	-	PASS
2	Browser opens and navigates to https://example.cypress.io/commands/actions	Page loads with a list of action buttons visible	-	PASS
3	Find the first button with class 'action-btn'	Button element found with text 'Click me'	-	PASS
4	Click the found button	Button clicked, page reacts by changing button text	-	PASS
5	Assert the button text is now 'Clicked!'	Button text updated to 'Clicked!'	Verify button text equals 'Clicked!'	PASS

Failure Scenario

Failing Condition: Button text does not change to 'Clicked!' after click

Execution Trace Quiz - 3 Questions

What does the assertion in this test verify?

A That the button is visible on the page

B That the page URL is correct

C That the button text changes to 'Clicked!' after clicking

D That the button is disabled

Key Result

Assertions are essential because they confirm that the application behaves as expected after actions, helping catch errors early.