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12 best Java Unit Testing libraries in 2023

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by Open Weaver kits ✔ dot icon Updated: Mar 10, 2023

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Unit testing is a software testing method by which individual units of source code are tested to determine if they are fit for use. A unit is the smallest testable part of an application like functions, classes, procedures, interfaces, etc. In procedural programming, a unit may be an individual program, function, procedure, or even a single line of code. In object-oriented programming (OOP), the smallest unit is a method, which may belong to a base/ super class or abstract class, or derived/ child class. Here are 12 best Java Unit Testing Open Source libraries in 2022 including mockito - popular Mocking framework for unit tests written; powermock - Java framework for unit testing; ArchUnit - a free, simple and extensible library for checking the architecture of your Java code.

mockitoby mockito

Java doticonstar image 13949 doticonVersion:v5.3.1doticon
License: Permissive (MIT)

Most popular Mocking framework for unit tests written in Java

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            mockitoby mockito

            Java doticon star image 13949 doticonVersion:v5.3.1doticon License: Permissive (MIT)

            Most popular Mocking framework for unit tests written in Java
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                      robolectricby robolectric

                      Java doticonstar image 5646 doticonVersion:robolectric-4.10.3doticon
                      License: Others (Non-SPDX)

                      Android Unit Testing Framework

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                                robolectricby robolectric

                                Java doticon star image 5646 doticonVersion:robolectric-4.10.3doticon License: Others (Non-SPDX)

                                Android Unit Testing Framework
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                                          powermockby powermock

                                          Java doticonstar image 3983 doticonVersion:powermock-2.0.9doticon
                                          License: Permissive (Apache-2.0)

                                          PowerMock is a Java framework that allows you to unit test code normally regarded as untestable.

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                                                    powermockby powermock

                                                    Java doticon star image 3983 doticonVersion:powermock-2.0.9doticon License: Permissive (Apache-2.0)

                                                    PowerMock is a Java framework that allows you to unit test code normally regarded as untestable.
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                                                              ArchUnitby TNG

                                                              Java doticonstar image 2687 doticonVersion:v1.0.1doticon
                                                              License: Permissive (Apache-2.0)

                                                              A Java architecture test library, to specify and assert architecture rules in plain Java

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                                                                        ArchUnitby TNG

                                                                        Java doticon star image 2687 doticonVersion:v1.0.1doticon License: Permissive (Apache-2.0)

                                                                        A Java architecture test library, to specify and assert architecture rules in plain Java
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                                                                                  equalsverifierby jqno

                                                                                  Java doticonstar image 620 doticonVersion:equalsverifier-3.14.1doticon
                                                                                  License: Permissive (Apache-2.0)

                                                                                  EqualsVerifier can be used in Java unit tests to verify whether the contract for the equals and hashCode methods is met.

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                                                                                            equalsverifierby jqno

                                                                                            Java doticon star image 620 doticonVersion:equalsverifier-3.14.1doticon License: Permissive (Apache-2.0)

                                                                                            EqualsVerifier can be used in Java unit tests to verify whether the contract for the equals and hashCode methods is met.
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                                                                                                      groovykoansby nadavc

                                                                                                      Groovy doticonstar image 255 doticonVersion:Currentdoticon
                                                                                                      License: Permissive (WTFPL)

                                                                                                      A collection of small exercises in the form of unit tests, designed to get Java developers up to speed on Groovy

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                                                                                                                groovykoansby nadavc

                                                                                                                Groovy doticon star image 255 doticonVersion:Currentdoticon License: Permissive (WTFPL)

                                                                                                                A collection of small exercises in the form of unit tests, designed to get Java developers up to speed on Groovy
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                                                                                                                          webtauby testingisdocumenting

                                                                                                                          Java doticonstar image 307 doticonVersion:1.53doticon
                                                                                                                          License: Permissive (Apache-2.0)

                                                                                                                          WebTau (web test automation) is a testing API, command line tool and a framework to write unit, integration and end-to-end tests. Test across REST-API, WebSocket, GraphQL, Browser, Database, CLI and Business Logic with a consistent set of matchers and concepts. REPL mode speeds-up tests development. Rich reporting cuts down investigation time.

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                                                                                                                                    webtauby testingisdocumenting

                                                                                                                                    Java doticon star image 307 doticonVersion:1.53doticon License: Permissive (Apache-2.0)

                                                                                                                                    WebTau (web test automation) is a testing API, command line tool and a framework to write unit, integration and end-to-end tests. Test across REST-API, WebSocket, GraphQL, Browser, Database, CLI and Business Logic with a consistent set of matchers and concepts. REPL mode speeds-up tests development. Rich reporting cuts down investigation time.
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                                                                                                                                              log-captorby Hakky54

                                                                                                                                              Java doticonstar image 266 doticonVersion:Currentdoticon
                                                                                                                                              License: Permissive (Apache-2.0)

                                                                                                                                              🎯 LogCaptor captures log entries for unit and integration testing purposes

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                                                                                                                                                        log-captorby Hakky54

                                                                                                                                                        Java doticon star image 266 doticonVersion:Currentdoticon License: Permissive (Apache-2.0)

                                                                                                                                                        🎯 LogCaptor captures log entries for unit and integration testing purposes
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                                                                                                                                                                  robolectric-demoby ChrisZou

                                                                                                                                                                  Java doticonstar image 21 doticonVersion:Currentdoticon
                                                                                                                                                                  License: Permissive (Apache-2.0)

                                                                                                                                                                  A demo of using robolectric to do unit testing

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                                                                                                                                                                            robolectric-demoby ChrisZou

                                                                                                                                                                            Java doticon star image 21 doticonVersion:Currentdoticon License: Permissive (Apache-2.0)

                                                                                                                                                                            A demo of using robolectric to do unit testing
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                                                                                                                                                                                      testing-junit5-mockitoby springframeworkguru

                                                                                                                                                                                      Java doticonstar image 11 doticonVersion:Currentdoticon
                                                                                                                                                                                      License: Permissive (Apache-2.0)

                                                                                                                                                                                      Testing Java JUnit 5 with Mockito

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                                                                                                                                                                                                testing-junit5-mockitoby springframeworkguru

                                                                                                                                                                                                Java doticon star image 11 doticonVersion:Currentdoticon License: Permissive (Apache-2.0)

                                                                                                                                                                                                Testing Java JUnit 5 with Mockito
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                                                                                                                                                                                                          mockito-testngby mockito

                                                                                                                                                                                                          Java doticonstar image 10 doticonVersion:v0.4.31doticon
                                                                                                                                                                                                          License: Permissive (MIT)

                                                                                                                                                                                                          Mockito TestNG support

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                                                                                                                                                                                                                    mockito-testngby mockito

                                                                                                                                                                                                                    Java doticon star image 10 doticonVersion:v0.4.31doticon License: Permissive (MIT)

                                                                                                                                                                                                                    Mockito TestNG support
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                                                                                                                                                                                                                              spring-unit-testing-with-junit-and-mockitoby rajyalakshmithumarada

                                                                                                                                                                                                                              Java doticonstar image 0 doticonVersion:Currentdoticon
                                                                                                                                                                                                                              License: Permissive (MIT License)

                                                                                                                                                                                                                              Spring Unit Testing with JUnit and Mockito

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                                                                                                                                                                                                                                        spring-unit-testing-with-junit-and-mockitoby rajyalakshmithumarada

                                                                                                                                                                                                                                        Java doticon star image 0 doticonVersion:Currentdoticon License: Permissive (MIT License)

                                                                                                                                                                                                                                        Spring Unit Testing with JUnit and Mockito
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