Mockito is a mocking framework that tastes really good. It lets you write beautiful tests with a clean & simple API. Mockito doesn’t give you hangover because the tests are very readable and they produce clean verification errors.

Mockito - Most popular Mocking framework for unit tests written in Java

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.

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

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

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

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

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Mockito - Most popular Mocking framework for unit tests written in Java

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

Ginkgo - BDD Testing Framework for Go

Codeception - Full-stack testing PHP framework

Robolectric - Android Unit Testing Framework

Randoop - Automatic test generation for Java

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Mockito - Most popular Mocking framework for unit tests written in Java

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

Ginkgo - BDD Testing Framework for Go

Codeception - Full-stack testing PHP framework

Robolectric - Android Unit Testing Framework

Randoop - Automatic test generation for Java

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