Assertion

Automation

// Definition

A statement in a test that checks an expected condition holds. If it doesn't, the test fails. The core of every automated test.

// Code Example

CypressAssertions in Cypress

TypeScript

// Assert element visibility and text
cy.get('[data-testid="welcome"]')
  .should('be.visible')
  .and('contain', 'Welcome to qa.codes');

// Assert API response status
cy.request('/api/tools')
  .its('status')
  .should('eq', 200);

// Related terms

Test Case
A single, executable specification: preconditions, steps, expected result, and pass/fail criteria for one verification.
Auto-waiting
A framework feature that pauses an action until the target element is actionable (visible, enabled, stable). Eliminates most need for explicit sleeps and reduces flake.
Test Suite
A collection of related test cases organised for execution together — usually grouped by feature, layer (unit, integration, e2e), or test type (smoke, regression).

Learn more · JavaScript for QA

Chapter 6 · Lesson 4: How Automation Frameworks Interact With the DOM