How it works
Test dependencies as code
No more need for mocks or complicated environment configurations. Define your test dependencies as code, then simply run your tests and containers will be created and then deleted.
With support for many languages and testing frameworks, all you need is Docker.
GenericContainer redis = new GenericContainer("redis:5.0.3-alpine")
.withExposedPorts(6379);
container, err := testcontainers.GenericContainer(ctx, testcontainers.GenericContainerRequest{
ContainerRequest: testcontainers.ContainerRequest{
Image: "redis:5.0.3-alpine",
ExposedPorts: []string{"6379/tcp"},
WaitingFor: wait.ForLog("Ready to accept connections"),
},
Started: true,
})
RedisContainer redisContainer = new RedisBuilder().Build();
await redisContainer.StartAsync();
const redis = await new GenericContainer("redis:5.0.3-alpine")
.withExposedPorts(6379)
.withWaitStrategy(Wait.forLogMessage("Ready to accept connections"))
.start();
redis = (
DockerContainer("redis:5.0.3-alpine")
.with_exposed_ports(6379)
)
redis.start()
wait_for_logs(redis, "Ready to accept connections")
let redis = GenericImage::new("redis", "7.2.4")
.with_exposed_port(6379)
.with_wait_for(WaitFor::message_on_stdout("Ready to accept connections"))
.start();
redis <-
run $
containerRequest (TestContainers.fromTag "redis:5.0.3-alpine")
& setExpose ["6379/tcp"]
& setWaitingFor (waitUntilMappedPortReachable "6379/tcp")
redis = Testcontainers::DockerContainer.new("redis:5.0.3-alpine").with_exposed_port(6379)
redis.start
(def container (-> (tc/create {:image-name "redis:5.0.3-alpine")
:exposed-ports [6379]})
(tc/start!)))
{:ok, _} = Testcontainers.start_link()
config = %Testcontainers.Container{image: "redis:5.0.3-alpine"}
{:ok, container} = Testcontainers.start_container(config)
Modules
Test Anything You Can Containerize: Database, Message Broker, And More
Use cases
How TestcontainersĀ® can help you
Data access layer integration tests
Use a containerized instance of your database to test your data access layer code for complete compatibility, without requiring a complex setup on developer machines. Trust that your tests will always start with a known state.
UI/Acceptance tests
Use containerized web browsers, compatible with Selenium, to run automated UI tests. Each test gets a fresh, clean instance of the browser, without having to worry about variations in plugins or required updates.
Application integration tests
Run your application in a short-lived test mode with dependencies, such as databases, message queues or web servers, to give you a rich interactive and explorative testing environment.
Articles About Testcontainers
engineering.atspotify.com
Announcing the Recipients of the 2023 Spotify FOSS Fund
Testcontainers was also part of last yearās fund, receiving 13,000 EUR. And thereās a good reason why itās back in 2023
devblogs.microsoft.com
Trying out MongoDB with EF Core using Testcontainers
An introduction to the MongoDB database provider for EF Core, including use of Testcontainers
uber.com
Handling Flaky Unit Tests in Java
Building a stable and reliable testing system is often a key requirement for software development organizations
doordash.engineering
How to Boost Code Coverage with Functional Testing
Introducing a non manual functional testing approach that can be run like unit tests locally or in a Continuous Integration (CI) pipeline.
capitalone.com
Testcontainers & LocalStack for Spring Boot functional tests
A guide from Capital One to using Docker and Testcontainers to make functional tests more portable & economical without sacrificing testing quality.
cloud.google.com
Develop and Test Spring Boot Applications Consistently
Learn how to consistently build and test with environment parity from development to production with Emulators and open-source Testcontainers.
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