AVA is a test runner for Node.js with a concise API, detailed error output, embrace of new language features and process isolation that lets you develop with confidence. AVA automatically detects whether your CI environment supports parallel builds. Each build will run a subset of all test files, while still making sure all tests get executed. It automatically removes unrelated lines in stack traces, allowing you to find the source of an error much faster.
 
Its features include:
<ul>
<li>Minimal and fast</li>
<li>Simple test syntax</li>
<li>Runs tests concurrently</li>
<li>Enforces writing atomic tests</li>
<li>No implicit globals</li>
<li>Includes TypeScript definitions</li>
<li>Magic assert</li>
<li>Isolated environment for each test file</li>
<li>Promise support</li>
<li>Async function support</li>
<li>Observable support</li>
<li>Enhanced assertion messages</li>
<li>Automatic parallel test runs in CI</li>
<li>TAP reporter</li>
</ul>

AVA is a test runner for Node.js with a concise API, detailed error output, embrace of new language features and process isolation that lets you develop with confidence. AVA automatically detects whether your CI environment supports parallel builds. Each build will run a subset of all test files, while still making sure all tests get executed. It automatically removes unrelated lines in stack traces, allowing you to find the source of an error much faster.

Ava - Futuristic JavaScript test runner

Robolectric is the industry-standard unit testing framework for Android. With Robolectric, your tests run in a simulated Android environment inside a JVM, without the overhead and flakiness of an emulator. Robolectric tests routinely run 10x faster than those on cold-started emulators. Robolectric supports running unit tests for 16 different versions of Android, ranging from Jelly Bean (API level 16) to SV2 (API level 32).
 
Unlike traditional emulator-based Android tests, Robolectric tests run inside a sandbox which allows the Android environment to be precisely configured to the desired conditions for each test, isolates each test from its neighbors, and extends the Android framework with test APIs which provide minute control over the Android framework’s behavior and visibility of state for assertions.

Robolectric is the industry-standard unit testing framework for Android. With Robolectric, your tests run in a simulated Android environment inside a JVM, without the overhead and flakiness of an emulator. Robolectric tests routinely run 10x faster than those on cold-started emulators. Robolectric supports running unit tests for 16 different versions of Android, ranging from Jelly Bean (API level 16) to SV2 (API level 32).

Robolectric - Android Unit Testing Framework

Keploy is a no-code testing platform that generates tests from API calls. It converts API calls into testcases. Mocks are automatically generated with the actual request/responses.
 
It can automatically mock network/external dependencies with correct responses. No more manually writing mocks for dependencies like DBs, internal services, or third party services like twilio, shopify or stripe. It can safely replay writes or mutations by capturing from local or other environments. 
 
It also does automatic instrumentation for popular libraries/drivers like sql, http, grpc, etc. Web Console is available to visually understand the results, update behaviour and share findings across your team.

Keploy is a no-code testing platform that generates tests from API calls. It converts API calls into testcases. Mocks are automatically generated with the actual request/responses.

Keploy - No code API testing platform. Create unit tests and data mocks from API calls

Storybook is a development environment for UI components. It allows you to browse a component library, view the different states of each component, and interactively develop and test components. Storybook runs outside of your app. This allows you to develop UI components in isolation, which can improve component reuse, testability, and development speed. You can build quickly without having to worry about application-specific dependencies.
 
Storybook helps to document UI to share with your team. You can publish Storybook online to give your team a universal reference point for feedback.

Storybook is a development environment for UI components. It allows you to browse a component library, view the different states of each component, and interactively develop and test components. Storybook runs outside of your app. This allows you to develop UI components in isolation, which can improve component reuse, testability, and development speed. You can build quickly without having to worry about application-specific dependencies.

Storybook - Build bulletproof UI components faster in React, Vue, Angular, and more.

Randoop generates unit tests using feedback-directed random test generation. This technique pseudo-randomly, but smartly, generates sequences of method/constructor invocations for the classes under test. Randoop executes the sequences it creates, using the results of the execution to create assertions that capture the behavior of your program. Randoop creates tests from the code sequences and assertions. 
 
 Randoop can be used for two purposes: to find bugs in your program, and to create regression tests to warn you if you change your program's behavior in the future.

Randoop generates unit tests using feedback-directed random test generation. This technique pseudo-randomly, but smartly, generates sequences of method/constructor invocations for the classes under test. Randoop executes the sequences it creates, using the results of the execution to create assertions that capture the behavior of your program. Randoop creates tests from the code sequences and assertions. 

Randoop - Automatic test generation for Java

Codeception is a modern full-stack testing framework for PHP. Inspired by BDD, it provides an absolutely new way of writing acceptance, functional and even unit tests. Powered by PHPUnit. Codeception provides high-level domain language for tests. Tests are represented as a set of user's actions. Tests can be executed using Firefox, Chrome, Safari or Cloud Testing services with Selenium WebDriver. Browser can be emulated with HTTP-requests through CURL with PhpBrowser. 
 
Codeception simplifies REST and SOAP testing. There are flexible commands to test structure and data of JSON and XML responses. Testing can be done over HTTP or inside a framework.

Codeception is a modern full-stack testing framework for PHP. Inspired by BDD, it provides an absolutely new way of writing acceptance, functional and even unit tests. Powered by PHPUnit.  Codeception provides high-level domain language for tests. Tests are represented as a set of user's actions.  Tests can be executed using Firefox, Chrome, Safari or Cloud Testing services with Selenium WebDriver. Browser can be emulated with HTTP-requests through CURL with PhpBrowser. 

Codeception - Full-stack testing PHP framework

Ginkgo is a BDD-style Go testing framework built to help you efficiently write expressive and comprehensive tests. It is best paired with the Gomega matcher library but is designed to be matcher-agnostic.

Ginkgo - BDD Testing Framework for Go

Karma is essentially a tool which spawns a web server that executes source code against test code for each of the browsers connected. The results for each test against each browser are examined and displayed via the command line to the developer such that they can see which browsers and tests passed or failed. It is a simple tool that allows you to execute JavaScript code in multiple real browsers. 

Karma - Spectacular Test Runner for JavaScript

Truth makes your test assertions and failure messages more readable. Similar to AssertJ, it natively supports many JDK and Guava types, and it is extensible to others.

Truth - Fluent assertions for Java

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