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11 best Java Assertion libraries in 2022

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by Open Weaver kits ✔ dot icon Updated: Apr 6, 2022

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Java Assertion is a mechanism to indicate that the programmer thinks that something unexpected has happened. It is like a sanity check in a code and should be used to ensure that the code works as expected. Assertion statements are available since Java 1.4 and can be enabled or disabled as per requirement. Assertions should not be used for user input validation, the normal flow of program execution, or any exception handling. Java Assertion Libraries is one of the most popular open-source libraries for assertion in Java. These libraries are useful to check whether the actual result and expected result are equal or not. Let's take a look at some of the most popular and useful assertion open source libraries in 2022 truth - Fluent assertions for Java and Android; assertj-core - library providing easy to use rich typed assertions; ArchUnit - Java architecture test library.

truthby google

Java doticonstar image 2576 doticonVersion:release_1_1_3doticon
License: Permissive (Apache-2.0)

Fluent assertions for Java and Android

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            truthby google

            Java doticon star image 2576 doticonVersion:release_1_1_3doticon License: Permissive (Apache-2.0)

            Fluent assertions for Java and Android
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                      assertj-coreby assertj

                      Java doticonstar image 2134 doticonVersion:Currentdoticon
                      License: Permissive (Apache-2.0)

                      AssertJ is a library providing easy to use rich typed assertions

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                                assertj-coreby assertj

                                Java doticon star image 2134 doticonVersion:Currentdoticon License: Permissive (Apache-2.0)

                                AssertJ is a library providing easy to use rich typed assertions
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                                          ArchUnitby TNG

                                          Java doticonstar image 2615 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 2615 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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                                                              fest-assert-2.xby alexruiz

                                                              Java doticonstar image 401 doticonVersion:Currentdoticon
                                                              License: Permissive (Apache-2.0)

                                                              FEST Fluent Assertions 2.x

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                                                                        fest-assert-2.xby alexruiz

                                                                        Java doticon star image 401 doticonVersion:Currentdoticon License: Permissive (Apache-2.0)

                                                                        FEST Fluent Assertions 2.x
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                                                                                  Java doticonstar image 396 doticonVersion:1.3.0doticon
                                                                                  License: Permissive (Apache-2.0)

                                                                                  TestObserver to easily test LiveData and make assertions on them.

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                                                                                            livedata-testingby jraska

                                                                                            Java doticon star image 396 doticonVersion:1.3.0doticon License: Permissive (Apache-2.0)

                                                                                            TestObserver to easily test LiveData and make assertions on them.
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                                                                                                      jfrunitby moditect

                                                                                                      Java doticonstar image 225 doticonVersion:v1.0.0.Alpha2doticon
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                                                                                                      A JUnit extension for asserting JDK Flight Recorder events

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                                                                                                                jfrunitby moditect

                                                                                                                Java doticon star image 225 doticonVersion:v1.0.0.Alpha2doticon License: Permissive (Apache-2.0)

                                                                                                                A JUnit extension for asserting JDK Flight Recorder events
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                                                                                                                          scottby dodie

                                                                                                                          Java doticonstar image 125 doticonVersion:3.6.0doticon
                                                                                                                          License: Permissive (MIT)

                                                                                                                          Never debug a test again: Detailed failure reports and hassle free assertions for Java tests - Power Asserts for Java

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                                                                                                                                    scottby dodie

                                                                                                                                    Java doticon star image 125 doticonVersion:3.6.0doticon License: Permissive (MIT)

                                                                                                                                    Never debug a test again: Detailed failure reports and hassle free assertions for Java tests - Power Asserts for Java
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                                                                                                                                              assertj-dbby assertj

                                                                                                                                              Java doticonstar image 97 doticonVersion:assertj-db-2.0.2doticon
                                                                                                                                              License: Others (Non-SPDX)

                                                                                                                                              Assertions for database

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                                                                                                                                                        assertj-dbby assertj

                                                                                                                                                        Java doticon star image 97 doticonVersion:assertj-db-2.0.2doticon License: Others (Non-SPDX)

                                                                                                                                                        Assertions for database
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                                                                                                                                                                  jplusoneby adgadev

                                                                                                                                                                  Java doticonstar image 94 doticonVersion:Currentdoticon
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                                                                                                                                                                  Tool for automatic detection and asserting "N+1 SELECT problem" occurences in JPA based Spring Boot Java applications and finding origin of JPA issued SQL statements in general

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                                                                                                                                                                            jplusoneby adgadev

                                                                                                                                                                            Java doticon star image 94 doticonVersion:Currentdoticon License: Permissive (Apache-2.0)

                                                                                                                                                                            Tool for automatic detection and asserting "N+1 SELECT problem" occurences in JPA based Spring Boot Java applications and finding origin of JPA issued SQL statements in general
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                                                                                                                                                                                      assertj-swingby assertj

                                                                                                                                                                                      Java doticonstar image 87 doticonVersion:3.17.1doticon
                                                                                                                                                                                      License: Others (Non-SPDX)

                                                                                                                                                                                      Fluent assertions for Swing apps

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                                                                                                                                                                                                assertj-swingby assertj

                                                                                                                                                                                                Java doticon star image 87 doticonVersion:3.17.1doticon License: Others (Non-SPDX)

                                                                                                                                                                                                Fluent assertions for Swing apps
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                                                                                                                                                                                                          Java doticonstar image 8 doticonVersion:v4.0.0doticon
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                                                                                                                                                                                                          This library provides a bunch of helpful assertj assertions for working with the kubernetes-api

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                                                                                                                                                                                                                    kubernetes-assertionsby fabric8io

                                                                                                                                                                                                                    Java doticon star image 8 doticonVersion:v4.0.0doticon License: Permissive (Apache-2.0)

                                                                                                                                                                                                                    This library provides a bunch of helpful assertj assertions for working with the kubernetes-api
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