System Rules vs Testcontainers

System Rules

A collection of JUnit rules for testing code which uses java.lang.System. (by stefanbirkner)

stefanbirkner.github.io

Testcontainers is a Java library that supports JUnit tests, providing lightweight, throwaway instances of common databases, Selenium web browsers, or anything else that can run in a Docker container. (by testcontainers)

Testing Java Docker docker-compose Junit test-automation Jvm HacktoberFest

Source Code

testcontainers.org

Docs

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System Rules		Testcontainers
	Project
-	Mentions	11
543	Stars	7,760
-	Growth	1.3%
0.0	Activity	9.7
about 1 year ago	Latest Commit	3 days ago
Java	Language	Java
GNU General Public License v3.0 or later	License	MIT License

The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.

System Rules

Posts with mentions or reviews of System Rules. We have used some of these posts to build our list of alternatives and similar projects.

We haven't tracked posts mentioning System Rules yet.
Tracking mentions began in Dec 2020.

Testcontainers

Posts with mentions or reviews of Testcontainers. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2024-02-27.

Testcontainers
16 projects | news.ycombinator.com | 27 Feb 2024

except the parent is wrong (at least the Java impl). see:
https://github.com/testcontainers/testcontainers-java/blob/m...
https://github.com/testcontainers/testcontainers-java/blob/m...
Reasons to Drop Docker for Podman
6 projects | news.ycombinator.com | 6 Aug 2023

> I wonder if Rancher Desktop, et al, works with testcontainers.org?
I don't use testcontainers myself, but it looks like as long as you are using Rancher Desktop >= 1.0.1 you should be just fine.[1]
[1] https://github.com/testcontainers/testcontainers-java/issues...
K1s.me - Simplifying Kubernetes Journey for newbie’s
1 project | /r/kubernetes | 12 Jul 2023

Thanks for the feedback. You are right, and there are some other mock-up alternatives as well, a good one for developers https://testcontainers.com/
Database Testing with Testcontainers and Kotlin Exposed ORM
3 projects | dev.to | 29 Jun 2023

In this article, we will explore how to use Testcontainers and Exposed, a lightweight ORM framework for Kotlin, to create a controlled environment for testing MySQL Database operations.
Spring Boot 3.1 RC1 is here - with support for Testcontainers and docker compose
2 projects | /r/java | 23 Apr 2023

Unfortunately, it still remains hard to use Testcontainers because of how wedded it is to junit4, five years after the release of junit 5. https://github.com/testcontainers/testcontainers-java/issues/970
Spring, SchemaSpy DB docs, and GitHub Pages
8 projects | dev.to | 12 Mar 2023

Finally, we put the directory with generated contents (HTML, CSS, JS) into a tarball. Testcontainers library allows to copy files from a container to the OS but not directories. That’s why we need an archive inside the SchemaSpy container.
Spring Cloud Gateway 4.0.0-RC2 native example with Testcontainers
7 projects | dev.to | 8 Dec 2022

This repository provides a BuildImageTest that uses the buildpack to create a native image. It then tests the native image, using Testcontainers and JUnit. Building the native image with AOT processing, as part of a test, takes minutes not seconds, and should not be part of normal "inner loop" development. So the BuildImageTest is in a separate sourceSet and can be executed independently. This is a very powerful pattern, that I'm just getting started with. I would love to hear your thoughts on this pattern or other alternatives to it.
Testcontainers for Hashicorp Consul and Vault
5 projects | dev.to | 16 Feb 2022

The list goes on. Check out the full list of Testcontainer modules.
Testcontainers with Spring Boot and Java 11/17
1 project | dev.to | 8 Dec 2021

Test-Container Java
Testing integration of multiple images?
3 projects | /r/docker | 19 Sep 2021

TestContainers looks Java specific... or are you talking about something else?

What are some alternatives?

When comparing System Rules and Testcontainers you can also consider the following projects:

Awaitility - Awaitility is a small Java DSL for synchronizing asynchronous operations

WireMock - A tool for mocking HTTP services

Truth - Fluent assertions for Java and Android

GreenMail - Official master for the Greenmail project

Cukes-REST - Cucumber DSL for testing RESTful Web Services

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

ConcurrentUnit - Toolkit for testing multi-threaded and asynchronous applications

Cucumber - Cucumber for the JVM

TestNG - TestNG testing framework

MockServer - MockServer enables easy mocking of any system you integrate with via HTTP or HTTPS with clients written in Java, JavaScript and Ruby. MockServer also includes a proxy that introspects all proxied traffic including encrypted SSL traffic and supports Port Forwarding, Web Proxying (i.e. HTTP proxy), HTTPS Tunneling Proxying (using HTTP CONNECT) and SOCKS Proxying (i.e. dynamic port forwarding).

Pact JVM - JVM version of Pact. Enables consumer driven contract testing, providing a mock service and DSL for the consumer project, and interaction playback and verification for the service provider project.

REST Assured - Java DSL for easy testing of REST services