REACT APPLICATION TESTING

Testing or Quality Assurance (QA) ensures the high quality of the product, and also helps to identify and correct errors in its functionality. This stage is the most important in the life cycle of any application, because it allows you to determine whether the capabilities of the software meet its goals, objectives and customer requirements.

All major functions and components, usability, security level, performance, and speed of operation are subject to verification.

Using the JavaScript React library, specialists create applications that quickly respond to user actions (for example, using a filter, adding products to the cart, filling out a form, etc.), and also change the display without reloading the page.

In other words, the React framework allows you to develop an interactive product in which the interface responds as quickly as possible to any actions of the platform visitor.

Key features of the React library:

• universality: it can be used both on mobile platforms and on a server;
• declarative approach: the developer must think over and describe how the interface elements will look in different states;
• component approach: the library is based on a set of interconnected components;
• using DOM, JSX.

When testing an application, all these properties are also taken into account, since they are an integral part of the software product. React can be used in any web application. It can be embedded in other applications, and other applications can be embedded in it (with some restrictions).

The framework allows you to create completely different products, but the following points are usually included in the checklist during testing:

• Functional testing

First of all, the set of basic functions and capabilities of the product is checked, the work of system processes, and validation. Particular attention is paid to React components:

• rendering component trees in a simplified test environment and validating their intended output;
• End-to-end testing: running the application in a realistic browser environment.

Each component (with a set of subcomponents) can be tested separately from the others.

Unit testing tests individual software modules, such as a specific function, method, procedure, or object, to ensure that it works correctly. In the case of integration, similar actions are performed with the blocks combined into a group.

• UI / UX testing

Usability tests reveal how simple and straightforward a product is to use, whether it provides a positive user experience, and whether it is structured correctly.

QA specialists check all interface elements, in particular – compliance of the software with the specification during user interaction. This improves the overall quality of the application and ensures user friendliness.

• Testing the speed of work

One of the indisputable advantages of React, along with simplicity and scalability, is the provision of high speed of work. This property plays an important role when interacting with the application.

Testing utilities (ReactTestUtils)

In order to simplify and speed up the testing process, developers often use special utilities. For example, the React Testing Library is a tool that simulates the behavior of application users in the browser. Facebook uses the Jest test framework (which roughly implements the browser) to validate JavaScript code. Other popular utilities include Simulate and Enzyme.

AVADA MEDIA develops and professionally tests scalable React applications for business. We implement projects of any complexity that involve a large number of user interactions.

In addition to ensuring product quality, testing has other important functions:

• determines the level of readiness of the application for release;
• prevents regression – the reappearance of a problem that was previously fixed by the developers;
• checks scripts under valid / invalid conditions of use;
• identifies problems in the operation of software;
• provides the functionality of complex components and modular applications;

• checks compatibility with various devices;
• helps reduce future service and support costs for the product.

The company offers a full range of quality control services: from the planning stage to improving the software development procedure.

In addition to the standard verification steps, our QA specialists conduct load, regression and cross-browser testing, as well as testing the installation, security and localization of the product. Automation tools are widely used to significantly save time and resources. In this case, typical analysis algorithms are used, thanks to which developers can quickly assess critical points and identify possible defects.

In our work, we focus on the needs of the end user and the wishes of the client, we use proven algorithms, checklists and services that allow us to cope with any task as efficiently and quickly as possible.