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11 best Java Assertion libraries in 2022

by Open Weaver kits ✔ Updated: Apr 6, 2022

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 star image 2427 Version:release_1_1_3

License: Permissive (Apache-2.0)

Fluent assertions for Java and Android

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truthby google

Java star image 2427 Version:release_1_1_3 License: Permissive (Apache-2.0)

Fluent assertions for Java and Android
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assertj-coreby assertj

Java star image 2134 Version:Current

License: Permissive (Apache-2.0)

AssertJ is a library providing easy to use rich typed assertions

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assertj-coreby assertj

Java star image 2134 Version:Current License: Permissive (Apache-2.0)

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

Java star image 2129 Version:v0.23.1

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 star image 2129 Version:v0.23.1 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 star image 401 Version:Current

License: Permissive (Apache-2.0)

FEST Fluent Assertions 2.x

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fest-assert-2.xby alexruiz

Java star image 401 Version:Current License: Permissive (Apache-2.0)

FEST Fluent Assertions 2.x
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livedata-testingby jraska

Java star image 388 Version:1.2.0

License: Permissive (Apache-2.0)

TestObserver to easily test LiveData and make assertions on them.

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livedata-testingby jraska

Java star image 388 Version:1.2.0 License: Permissive (Apache-2.0)

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

Java star image 225 Version:v1.0.0.Alpha2

License: Permissive (Apache-2.0)

A JUnit extension for asserting JDK Flight Recorder events

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jfrunitby moditect

Java star image 225 Version:v1.0.0.Alpha2 License: Permissive (Apache-2.0)

A JUnit extension for asserting JDK Flight Recorder events
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scottby dodie

Java star image 125 Version:3.6.0

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 star image 125 Version:3.6.0 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 star image 97 Version:assertj-db-2.0.2

License: Others (Non-SPDX)

Assertions for database

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assertj-dbby assertj

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

Assertions for database
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jplusoneby adgadev

Java star image 94 Version:Current

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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jplusoneby adgadev

Java star image 94 Version:Current 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 star image 87 Version:3.17.1

License: Others (Non-SPDX)

Fluent assertions for Swing apps

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assertj-swingby assertj

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

Fluent assertions for Swing apps
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kubernetes-assertionsby fabric8io

Java star image 8 Version:v4.0.0

License: Permissive (Apache-2.0)

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

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kubernetes-assertionsby fabric8io

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

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