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react-testing-library VS Loadster

Compare react-testing-library VS Loadster and see what are their differences

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react-testing-library logo react-testing-library

[`React Testing Library`][gh] builds on top of `DOM Testing Library` by adding

Loadster logo Loadster

Loadster is load testing, stress testing, and site monitoring platform. Your site has a breaking point... load test to find it before your users do, and monitor to react quickly to downtime and other problems.
  • react-testing-library Landing page
    Landing page //
    2022-08-21
  • Loadster Landing page
    Landing page //
    2023-03-12

Loadster is a cloud-based load testing and synthetic monitoring platform for engineers who want to know how their applications behave under real traffic.

Tests run with three types of bots: Protocol Bots for HTTP testing, headless Browser Bots that render full pages and execute JavaScript in real Chrome browsers, and Playwright bots for when you want to use Playwright JS directly.

Loadster scripts can be recorded from Chrome or Firefox with the Loadster Recorder extension, edited in a built-in editor with variables, datasets, and shared includes, and then replayed from multiple cloud regions.

Each test run returns detailed page timings (TTFB, FCP, LCP, CLS, etc) alongside resource waterfalls, screenshots, and full traces you can step through in a self-hosted trace viewer. Tests scale from a handful of virtual users (bots) to hundreds of thousands across distributed cloud engines without you provisioning anything.

The same scripts can be set up as monitors that run on a schedule from chosen regions. Notification policies route incidents to email, SMS, voice, or integrations like Slack and PagerDuty. Projects, roles, and shared test history keep teams aligned on what passed, what failed, and what changed.

Pricing is usage-based via Loadster Fuel, with 50 free units on sign-up and no credit card to start.

react-testing-library features and specs

  • Focused on user-centric testing
    React Testing Library encourages tests that closely resemble how users interact with an application. This approach makes tests more reliable and meaningful.
  • Reduces coupling to implementation details
    By encouraging developers to interact with components via the DOM, the library minimizes dependencies on component internals, making tests less prone to breaking from refactors.
  • Improved test readability
    Tests written with React Testing Library are generally easier to read and understand because they focus on what the user sees and does, rather than the internal logic of the components.
  • Comprehensive query options
    The library provides a wide range of query methods (e.g., getByText, getByRole), which makes it easy to select elements in ways that resemble how users think.
  • Active community and well-maintained
    React Testing Library has a strong, active community and it's maintained by experienced developers who keep the library up-to-date with React's evolution.

Possible disadvantages of react-testing-library

  • Limited support for non-DOM testing
    The library is heavily focused on DOM interactions, making it less suited for testing non-DOM logic or scenarios that don't involve user interactions.
  • Can be slower
    Tests that involve the DOM can be slower compared to tests that interact directly with component methods and state, which can lead to longer test execution times.
  • Learning curve for traditional testers
    Developers who are used to testing implementation details with other tools (like Enzyme) might find it challenging to adjust to the user-centric approach advocated by React Testing Library.
  • Potential for less granular control
    Because the library encourages testing through the UI, developers might find it harder to test specific, isolated internal behaviors of components that aren't directly visible to users.
  • Dependencies on browser APIs
    The library's reliance on browser APIs means that tests may behave differently in different environments or may require polyfills for certain features, leading to potential inconsistencies.

Loadster features and specs

  • Scalability
    Loadster can simulate thousands of users, which makes it useful for testing the performance of applications under high traffic conditions.
  • Detailed Reporting
    Loadster offers comprehensive and detailed reports, including real-time performance metrics, which help in identifying bottlenecks and issues quickly.
  • Easy Script Creation
    The tool provides an intuitive interface for creating and managing test scripts, making it accessible even for users with limited coding experience.
  • Cross-Platform Support
    Loadster supports various platforms, allowing users to test web applications on different browsers and devices.
  • Cloud-Based Execution
    Loadster allows for both on-premises and cloud-based test executions, providing flexibility in how tests are managed and run.

Possible disadvantages of Loadster

  • Cost
    The pricing for Loadster can be high, especially for small businesses or individual developers, which might make it less accessible.
  • Learning Curve
    Despite the easy script creation, there can be a learning curve associated with fully leveraging all the features and capabilities of the platform.
  • Limited Integrations
    Compared to some competitors, Loadster may have fewer integrations with other tools and platforms, which could restrict its utility in some environments.
  • Resource Consumption
    Running large-scale tests can consume a significant amount of system resources, which might impact other processes or require additional hardware.
  • Dependency on Internet Connectivity
    While cloud-based execution is a benefit, it also means that reliable internet connectivity is essential, which could be a drawback in areas with unstable connections.

Analysis of react-testing-library

Overall verdict

  • React Testing Library is highly regarded in the React community for its simplicity and effective approach to testing React components. It’s known for promoting good testing practices that result in reliable and maintainable code.

Why this product is good

  • React Testing Library is considered good because it encourages testing practices that closely resemble how users interact with the application. It emphasizes testing components from the user's perspective and discourages testing implementation details, which can lead to more robust and maintainable tests.

Recommended for

  • Developers looking to improve the reliability of their React applications
  • Teams interested in adopting user-centric testing methodologies
  • Projects that prioritize maintainable and understandable test code

Analysis of Loadster

Overall verdict

  • Overall, Loadster is considered a good choice for businesses and individuals who need reliable and flexible load testing. Its user-friendly interface and advanced testing features make it a valuable tool for ensuring web applications can handle real-world traffic scenarios.

Why this product is good

  • Loadster is known for its comprehensive and efficient load testing capabilities. It allows users to simulate heavy traffic on web applications to test scalability and performance. Its ability to generate load from multiple geographical locations and support for various protocols makes it a versatile tool for developers and testers aiming to optimize web application performance.

Recommended for

  • Web developers and testers who need to validate the scalability of web applications.
  • Businesses looking for a load testing tool with multi-region support.
  • Teams that require a user-friendly interface with robust testing capabilities.
  • Organizations that need to simulate real-world traffic on different protocols.

react-testing-library videos

+ Add

React unit testing with Jest & React-testing-library

More videos:

  • Review - Test a React Component that renders a list with react-testing-library

Loadster videos

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Review Cargobike Citkar Loadster: 4 Räder, 400 kg zulässiges Gesamtgewicht - kann das gut gehen?

Category Popularity

0-100% (relative to react-testing-library and Loadster)

react-testing-library

Loadster

Developer Tools
100 100%
Developer Tools
0% 0
Website Testing
0 0%
Website Testing
100% 100
Javascript UI Libraries
100 100%
Javascript UI Libraries
0% 0
Load And Performance Testing
0 0%
Load And Performance Testing
100% 100

User comments

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Social recommendations and mentions

Based on our record, react-testing-library seems to be more popular. It has been mentiond 137 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

react-testing-library mentions (137)

  • Test-Driven Development for Building User Interfaces
    React Testing Library’s core philosophy is that we should write our tests in such a way that we simulate user behavior. By testing what the user can actually do, our tests focus less on implementation details and more on the actual user interface, which leads to less brittle tests and a more reliable test suite. - Source: dev.to / 7 months ago
  • Chaos-Driven Testing for Full Stack Apps: Integration Tests That Break (and Heal)
    In the main branch, we set up Vitest as the test runner and React Testing Library for rendering the component and simulating user interactions. We also set up MSW to intercept the network requests and return mock responses. - Source: dev.to / 11 months ago
  • 🚀 9 Libraries to Boost Your Productivity as a React Developer
    React Testing Library (RTL) provides lightweight utilities built on top of react-dom and react-dom/test-utils, designed to promote testing through user interactions rather than component internals. Instead of working with component instances, RTL encourages querying and asserting against actual DOM nodes, just like real users would. This approach improves test reliability and pushes developers toward writing more... - Source: dev.to / about 1 year ago
  • Best Practices for React Applications
    Testing ensures code reliability and maintainability. Jest, Vitest and React Testing Library are standard tools for unit and integration testing. Unit tests verify individual components, while integration tests ensure features work together. For example, testing a TodoList component might involve:. - Source: dev.to / about 1 year ago
  • Migrating from AngularJS to React
    Additionally, I wrote Jest and Enzyme unit tests to demonstrate how to go about unit testing the components, as test driven development (TDD) is another methodology my organization subscribes to. Jest is a unit testing framework that actually shipped with React if you use the Create React App CLI to make a new React project. And at the time, Enzyme was created by Airbnb and added additional functionality to Jest... - Source: dev.to / over 1 year ago
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Loadster mentions (0)

We have not tracked any mentions of Loadster yet. Tracking of Loadster recommendations started around Mar 2021.

What are some alternatives?

When comparing react-testing-library and Loadster, you can also consider the following products

Jest - Jest is a delightful JavaScript Testing Framework with a focus on simplicity.

Loader.io - Loader.io is a simple cloud-based load testing service

Vitest - A blazing fast unit test framework powered by Vite

k6 Cloud - Managed load testing service built on top of the popular open-source project k6.

Enzyme - Enzyme is a JavaScript testing utility for React.

LoadForge - Better, cheaper load testing for websites, APIs and servers

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