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Testcontainers is an Elixir library that supports ExUnit tests, providing lightweight, throwaway instances of common databases, Selenium web browsers, or anything else that can run in a Docker container.
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lib/container/mysql_container.ex
# SPDX-License-Identifier: MIT
# Original by: Marco Dallagiacoma @ 2023 in https://github.com/dallagi/excontainers
# Modified by: Jarl André Hübenthal @ 2023
defmodule Testcontainers.Container.MySqlContainer do
@moduledoc """
Functions to build and interact with MySql containers.
"""
alias Testcontainers.Container
alias Testcontainers.WaitStrategy.CommandWaitStrategy
@mysql_port 3306
@doc """
Builds a MySql container.
Uses MySql 8.0 by default, but a custom image can also be set.
## Options
- `username` sets the username for the user
- `password` sets the password for the user
- `database` sets the name of the database
"""
def new(image \\ "mysql:8.0", opts \\ []) do
username = Keyword.get(opts, :username, "test")
password = Keyword.get(opts, :password, "test")
database = Keyword.get(opts, :database, "test")
Container.new(
image,
exposed_ports: [@mysql_port],
environment: %{
MYSQL_USER: username,
MYSQL_PASSWORD: password,
MYSQL_DATABASE: database,
MYSQL_RANDOM_ROOT_PASSWORD: "yes"
},
wait_strategy: wait_strategy(username, password)
)
end
@doc """
Returns the port on the _host machine_ where the MySql container is listening.
"""
def port(container), do: Container.mapped_port(container, @mysql_port)
@doc """
Returns the connection parameters to connect to the database from the _host machine_.
"""
def connection_parameters(%Container{} = container) do
[
hostname: "localhost",
port: port(container),
username: container.environment[:MYSQL_USER],
password: container.environment[:MYSQL_PASSWORD],
database: container.environment[:MYSQL_DATABASE]
]
end
defp wait_strategy(username, password) do
CommandWaitStrategy.new([
"sh",
"-c",
"mysqladmin ping --user='#{username}' --password='#{password}' -h localhost | grep 'mysqld is alive'"
])
end
end