compose

Testcontainers module for Docker Compose

Installation

Add the library to the test section in your application's Gemfile:

group :test do
  gem 'testcontainers-compose'
end

And then execute:

$ bundle install

Or install it yourself as:

$ gem install testcontainers-compose

Usage

To use the library, you first need to require it:

require "testcontainers/compose"

Creating a Compose Container

Create a new instance of the Testcontainers::ComposeContainer class:

compose = Testcontainer::ComposeContainer.new(filepath: Dir.getwd)

The instance creates a set of containers defined on the .yml file, the 'compose.start' wakes up all containers as service

Start the services on the compose file.

compose.start

Stop the services:

compose.stop

Connecting to services

Once the service is running, you can obtain the mapped port to connect to it:

compose.service_port(service: "hub", port: 4444)

You can inspect the logs of for the services also:

puts compose.logs

You can use wait_for_logs, wait_for_http and wait_for_tcp_port to wait for the services to start:

compose.wait_for_logs(/Service started/)
compose.wait_for_http(url: "http://localhost:4444/hub")
compose.wait_for_tcp_port(host: "localhost", port: 3306)

Configuration of services

This example initialize docker compose with two services described in the YML file located in the current directory:

services = ["hub","firefox"]
compose = Testcontainers::ComposeContainer.new(filepath: Dir.getwd, services: services)

You can specify the name of different docker-compose files also:

compose_filenames = ["docker-compose.dbs.yml", "docker-compose.web.yml"]
compose = Testcontainer::ComposeContainer.new(filepath: Dir.getwd, compose_filenames: compose_filenames)
compose.start

An env file can be specified when starting the services:

compose_filename = ["docker-compose.test.yml"]
compose = Testcontainers::ComposeContainer.new(filepath: Dir.getwd, env_file: ".env.test")

Executing commands in the container for a service

compose.exec(service_name: "hub", command: "echo test")

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/testcontainers/testcontainers-ruby. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the code of conduct.

License

The gem is available as open source under the terms of the MIT License.

Code of Conduct

Everyone interacting in the Testcontainers project's codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.