#Testcontainers

[smarttechie]

Using Testcontainers for Spring Boot Integration Testing

Photo by ThisisEngineering on Unsplash In this blog post, I will walk you through on how to write integration tests by using Testcontainers when we are building a Spring Boot application that integrates Apache Kafka as a message broker, PostgreSQL for database persistence. Spring Boot introduced great support for Testcontainers, making integration testing simpler and enhancing the ease of local…

[yanashin-blog]

It is no exaggeration to say that the history of software development is the history of software testing.

Since the advent of software, I am sure you are aware that we, the human race, have been working to improve quality in an effort to make things better.

By the way, when we look back on the history of mankind, we sometimes see the appearance of something that is a paradigm shift. For example, fire, and for example, electricity.

It is clear from history that the level of human culture changed dramatically before and after people learned how to use fire and electricity.

So what exactly is the paradigm shift in software development? What exactly is it that will be the fire and electricity for developers?

That is exactly what a Testcontainers is.

Software testing has long sought to improve efficiency in a variety of ways, and automation efforts have been encouraged. However, software is often affected by external factors, such as services external to the software, such as databases, message broker and etc.

In the past, software developers would work with infrastructure engineers to streamline the preparation of the development environment, for example.

Container technology and Testcontainers have created a paradigm shift that has changed the way software development and testing is done. Software developers themselves can now use databases and other environments as containers from the source code. It creates the environment on demand, when it is needed, and disposes of it neatly when it is no longer needed.

It is truly a Developer Experience itself, isn't it?

I would like to thank you for this wonderful project. I would also like to send my encouragement and support for the further development of this project.

And I am honored to have been chosen as a champion.

[ericvanderburg]

Configure Testcontainers in Spring Boot 3.x, 2.x, and Reactive

http://securitytc.com/TJR8Y8

[hackernewsrobot]

Testcontainers

https://testcontainers.com/

[takachan]

Docker社がTestcontainersの開発元AtomicJar社の買収を発表。Dockerでの統合テスト環境を強化

Docker社がTestcontainersの��発元であるAtomicJar社の買収を発表しました。 Big news! @AtomicJarInc is now part of @Docker! Together, we will con... https://www.publickey1.jp/blog/23/dockertestcontainersatomicjardocker.html?utm_source=dlvr.it&utm_medium=tumblr Publickey

[inextures]

Exploring the Exciting Features of Spring Boot 3.1

Spring Boot is a popular Java framework that is used to build robust and scalable applications. With each new release, Spring Boot introduces new features and enhancements to improve the developer experience and make it easier to build production-ready applications. The latest release, Spring Boot 3.1, is no exception to this trend.

In this blog post, we will dive into the exciting new features offered in Spring Boot 3.1, as documented in the official Spring Boot 3.1 Release Notes. These new features and enhancements are designed to help developers build better applications with Spring Boot. By taking advantage of these new features, developers can build applications that are more robust, scalable, and efficient.

So, if you’re a developer looking to build applications with Spring Boot, keep reading to learn more about the exciting new features offered in Spring Boot 3.1!

Feature List:

         1. Dependency Management for Apache HttpClient 4:

Spring Boot 3.0 includes dependency management for both HttpClient 4 and 5.

Spring Boot 3.1 removes dependency management for HttpClient 4 to encourage users to move to HttpClient 5.2. Servlet and Filter Registrations:

The ServletRegistrationBean and FilterRegistrationBean classes will now throw an IllegalStateException if registration fails instead of logging a warning.

To retain the old behaviour, you can call setIgnoreRegistrationFailure(true) on your registration bean.3. Git Commit ID Maven Plugin Version Property:

The property used to override the version of io.github.git-commit-id:git-commit-id-maven-plugin has been updated.

Replace git-commit-id-plugin.version with git-commit-id-maven-plugin.version in your pom.xml.4. Dependency Management for Testcontainers:

Spring Boot’s dependency management now includes Testcontainers.

You can override the version managed by Spring Boot Development using the testcontainers.version property.5. Hibernate 6.2:

Spring Boot 3.1 upgrades to Hibernate 6.2.

Refer to the Hibernate 6.2 migration guide to understand how it may affect your application.6. Jackson 2.15:

TestContainers

The Testcontainers library is a tool that helps manage services running inside Docker containers. It works with testing frameworks such as JUnit and Spock, allowing you to write a test class that starts up a container before any of the tests run. Testcontainers are particularly useful for writing integration tests that interact with a real backend service such as MySQL, MongoDB, Cassandra, and others.

Integration tests with Testcontainers take it to the next level, meaning we will run the tests against the actual versions of databases and other dependencies our application needs to work with executing the actual code paths without relying on mocked objects to cut the corners of functionality.

<dependency>   <groupId>org.springframework.boot</groupId>   <artifactId>spring-boot-testcontainers</artifactId>   <scope>test</scope> </dependency> <dependency>   <groupId>org.testcontainers</groupId>   <artifactId>junit-jupiter</artifactId>   <scope>test</scope> </dependency>

Add this dependency and add @Testcontainers in SpringTestApplicationTests class and run the test case

@SpringBootTest @Testcontainers class SpringTestApplicationTests {   @Container   GenericContainer<?> container = new GenericContainer<>("postgres:9");   @Test   void myTest(){       System.out.println(container.getContainerId()+ "  "+container.getContainerName());       assert (1 == 1);   } }

This will start the docker container for Postgres with version 9

We can define connection details to containers using “@ServiceConnection” and “@DynamicPropertySource”.

a. ConnectionService

@SpringBootTest @Testcontainers class SpringTestApplicationTests {   @Container   @ServiceConnection   static MongoDBContainer container = new MongoDBContainer("mongo:4.4"); }

Thanks to @ServiceConnection, the above configuration allows Mongo-related beans in the application to communicate with Mongo running inside the Testcontainers-managed Docker container. This is done by automatically defining a MongoConnectionDetails bean which is then used by the Mongo auto-configuration, overriding any connection-related configuration properties.

b. Dynamic Properties

A slightly more verbose but also more flexible alternative to service connections is @DynamicPropertySource. A static @DynamicPropertySource method allows adding dynamic property values to the Spring Environment.

@SpringBootTest @Testcontainers class SpringTestApplicationTests {   @Container   @ServiceConnection   static MongoDBContainer container = new MongoDBContainer("mongo:4.4");   @DynamicPropertySource   static void registerMongoProperties(DynamicPropertyRegistry registry) {       String uri = container.getConnectionString() + "/test";       registry.add("spring.data.mongodb.uri", () -> uri);   } }

c. Using Testcontainers at Development Time

Test the application at development time, first we start the Mongo database our app won’t be able to connect to it. If we use Docker, we first need to execute the docker run command that runs MongoDB and exposes it on the local port.

Fortunately, with Spring Boot 3.1 we can simplify that process. We don’t have to Mongo before starting the app. What we need to do – is to enable development mode with Testcontainers.

<dependency>   <groupId>org.springframework.boot</groupId>   <artifactId>spring-boot-testcontainers</artifactId>   <scope>test</scope> </dependency>

Then we need to prepare the @TestConfiguration class with the definition of containers we want to start together with the app. For me, it is just a single MongoDB container as shown below:

public class MongoDBContainerDevMode {   @Bean   @ServiceConnection   MongoDBContainer mongoDBContainer() {       return new MongoDBContainer("mongo:5.0");   } }

2. Docker Compose

If you’re using Docker to containerize your application, you may have heard of Docker Compose, a tool for defining and running multi-container Docker applications. Docker Compose is a popular choice for developers as it enables them to define a set of containers and their dependencies in a single file, making it easy to manage and deploy the application.

Fortunately, Spring Boot 3.1 provides a new module called spring-boot-docker-compose that provides seamless integration with Docker Compose. This integration makes it even easier to deploy your Java Spring Boot application with Docker Compose. Maven dependency for this is given below:

The spring-boot-docker-compose module automatically looks for a Docker Compose configuration file in the current working directory during startup. By default, the module supports four file types: compose.yaml, compose.yml, docker-compose.yaml, and docker-compose.yml. However, if you have a non-standard file type, don’t worry – you can easily set the spring.docker.compose.file property to specify which configuration file you want to use.

When your application starts up, the services you’ve declared in your Docker Compose configuration file will be automatically started up using the docker compose up command. This means that you don’t have to worry about manually starting and stopping each service. Additionally, connection details beans for those services will be added to the application context so that the services can be used without any further configuration.

When the application stops, the services will then be shut down using the docker compose down command.

This module also supports custom images too. You can use any custom image as long as it behaves in the same way as the standard image. Specifically, any environment variables that the standard image supports must also be used in your custom image.

Overall, the spring-boot-docker-compose module is a powerful and user-friendly tool that simplifies the process of deploying your Spring Boot application with Docker Compose. With this module, you can focus on writing code and building your application, while the module takes care of the deployment process for you.

Conclusion

Overall, Spring Boot 3.1 brings several valuable features and improvements, making it easier for developers to build production-ready applications. Consider exploring these new features and enhancements to take advantage of the latest capabilities offered by Spring Boot.

Originally published by: Exploring the Exciting Features of Spring Boot 3.1

[devsnews]

Spring Boot 3.1 RC1 just dropped, with it, the long-anticipated support for container lifecycle management at development time! This Livestream will explore how to use Docker Compose and Testcontainers both.

[reportwire]

Component Tests for Spring Cloud Microservices

Component Tests for Spring Cloud Microservices

Introduction The shift towards microservices has a direct impact on the testing strategies applied and has introduced a number of complexities that need to be addressed. In fact, microservices require additional levels of testing since we have to deal with multiple independently deployable components. An excellent explanation of these concepts and the various levels of microservices testing is…

[sybrenbolandit]

Are you struggling finding the right strategy for your integration tests? Mocking does not cover everything and relying on all external services to be present also gives you a headache. What if there was a way to start the real service in your integration tests? In comes testcontainers.

[holytheoristtastemaker]

Digital Tutorials: Quarkus tests with Testcontainers and PostgreSQL https://t.co/3DIfwN0jcB

Digital Tutorials: Quarkus tests with Testcontainers and PostgreSQL https://t.co/3DIfwN0jcB

— Damian Fallon (@DamianFallon2) March 13, 2020

from Twitter https://twitter.com/DamianFallon2

[vewordude]

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[ericvanderburg]

Configure Testcontainers in Spring Boot 3.x, 2.x, and Reactive

http://securitytc.com/TJR7BX

[releaseteam]

via Twitter https://twitter.com/releaseteam

[devsnews]

TestContainers provides an isolated environment for each test and can be configured to spin up and tear down quickly. This helps to improve the speed and reliability of tests. Furthermore, TestContainers allows you to quickly set up databases and other services within the same test suite, such as Kafka, RabbitMQ, and Selenium. This helps to ensure that tests can run against multiple databases and environments. In addition, TestContainers improves debugging, troubleshooting, readability, and maintainability. This article will show us how to use this powerful test library in .Net projects.