Testing and Quality Assurance (QA)

xUnit.net is the most widely used unit testing framework for modern .NET. We use it with mocking and code coverage to keep business logic covered by fast, automated tests that run on every build, so changes can ship without manual regression passes.

NUnit is a long-standing open-source unit testing framework for .NET, and many established codebases are built on it. We write and maintain NUnit suites alongside xUnit, so we can strengthen the tests a client already has instead of starting over in a new framework.

Playwright is a powerful open-source automation framework that allows seamless testing of web applications across different browsers, including Chromium, Firefox, and WebKit. With its single API, Playwright enables our team at Trailhead to write robust tests in JavaScript or TypeScript, ensuring consistent performance across various browser environments. Additionally, Playwright’s built-in features for capturing screenshots, videos, and traces provide comprehensive insights into application behavior, enhancing our ability to deliver high-quality custom software solutions.

Cypress is a cutting-edge end-to-end testing framework designed with developers and QA engineers in mind. At Trailhead, we harness the power of Cypress to streamline our testing processes. The Cypress Test Runner empowers our team to efficiently set up, write, and execute tests locally, greatly enhancing our debugging capabilities. Whether it’s end-to-end, integration, or unit testing, Cypress supports it all, making it an ideal choice for verifying the functionality of web applications. With its real-time reloading and automatic waiting, Cypress ensures consistent and reliable testing, enabling us to deliver high-quality custom software solutions with confidence.

Postman is a versatile collaboration platform that streamlines the process of designing, testing, and documenting APIs. At Trailhead, we leverage Postman to create and execute API requests, monitor responses, and automate workflows, ensuring seamless integration between various components of our custom software solutions. Its user-friendly interface and extensive collection of pre-built tools make it an invaluable asset for our development and testing teams, enabling us to deliver robust and reliable cloud-based applications tailored to our clients’ needs.

Apache JMeter is an option for testing strength and analyzing overall performance under varying load types by simulating a heavy load on a network, object, server, or group of servers. The tool is useful for load testing functional behavior and measuring performance of both dynamic and static resources. JMeter has complete portability, 100% Java purity, and provides dynamic HTML reports.

Azure Load Testing is a powerful cloud-based service by Microsoft, essential for Trailhead’s performance testing arsenal. It enables us to simulate real-world traffic, stress test applications, and ensure optimal performance under various load conditions. By generating virtual user traffic from Azure data centers worldwide, we gain critical insights into system scalability and responsiveness, guaranteeing our custom software applications deliver seamless experiences even during peak usage. This tool plays a pivotal role in our quality assurance process, ensuring we deliver high-performance solutions to our clients.

axe, from Deque, is the most widely used engine for automated accessibility testing. We run it in the browser and inside Playwright and Cypress suites to catch WCAG issues such as missing labels, low contrast, and keyboard traps on every build, then follow up with manual testing for what automation can’t see.

Lighthouse is Google’s open-source tool for auditing web pages. It scores performance, accessibility, SEO, and best practices and points to specific fixes, and we use it in development and CI to keep pages fast and to track Core Web Vitals before and after changes.