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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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Files
lib/connection/docker_host_strategy/docker_host_from_properties.ex
# SPDX-License-Identifier: MIT
defmodule Testcontainers.DockerHostFromPropertiesStrategy do
@moduledoc false
@enforce_keys [:key]
defstruct key: nil, filename: "~/.testcontainers.properties"
defimpl Testcontainers.DockerHostStrategy do
alias Testcontainers.DockerUrl
def execute(strategy, _input) do
with {:ok, properties} <- read_property_file(expand_path(strategy.filename)),
docker_host <- Map.fetch(properties, strategy.key),
do: handle_docker_host(docker_host)
end
defp read_property_file(filepath) do
if File.exists?(filepath) do
with {:ok, content} <- File.read(filepath),
properties <- parse_properties(content) do
{:ok, properties}
else
error ->
{:error, testcontainer_host_from_properties: error}
end
else
{:error, testcontainer_host_from_properties: :file_does_not_exist}
end
end
defp parse_properties(content) do
content
|> String.split("\n")
|> Enum.map(&String.trim/1)
|> Enum.reject(&(&1 == "" or String.starts_with?(&1, "#")))
|> Enum.flat_map(&extract_key_value_pair/1)
|> Enum.into(%{})
end
defp extract_key_value_pair(line) do
case String.split(line, "=", parts: 2) do
[key, value] when is_binary(value) ->
[{String.trim(key), String.trim(value)}]
_other ->
[]
end
end
defp handle_docker_host({:ok, docker_host}) when is_binary(docker_host) do
case DockerUrl.test_docker_host(docker_host) do
:ok ->
{:ok, docker_host}
{:error, reason} ->
{:error, testcontainer_host_from_properties: reason}
end
end
defp handle_docker_host(:error),
do: {:error, testcontainer_host_from_properties: :property_not_found}
defp expand_path(path), do: Path.expand(path)
end
end