bc14696f57
Goal: have a personal blog, and try out another point in the 'modular app design with elixir' space. Designing OTP systems with elixir had some interesting ideas.
59 lines
1.6 KiB
Elixir
59 lines
1.6 KiB
Elixir
defmodule Firehose.DataCase do
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@moduledoc """
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This module defines the setup for tests requiring
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access to the application's data layer.
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You may define functions here to be used as helpers in
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your tests.
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Finally, if the test case interacts with the database,
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we enable the SQL sandbox, so changes done to the database
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are reverted at the end of every test. If you are using
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PostgreSQL, you can even run database tests asynchronously
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by setting `use Firehose.DataCase, async: true`, although
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this option is not recommended for other databases.
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"""
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use ExUnit.CaseTemplate
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using do
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quote do
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alias Firehose.Repo
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import Ecto
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import Ecto.Changeset
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import Ecto.Query
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import Firehose.DataCase
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end
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end
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setup tags do
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Firehose.DataCase.setup_sandbox(tags)
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:ok
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end
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@doc """
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Sets up the sandbox based on the test tags.
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"""
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def setup_sandbox(tags) do
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pid = Ecto.Adapters.SQL.Sandbox.start_owner!(Firehose.Repo, shared: not tags[:async])
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on_exit(fn -> Ecto.Adapters.SQL.Sandbox.stop_owner(pid) end)
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end
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@doc """
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A helper that transforms changeset errors into a map of messages.
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assert {:error, changeset} = Accounts.create_user(%{password: "short"})
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assert "password is too short" in errors_on(changeset).password
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assert %{password: ["password is too short"]} = errors_on(changeset)
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"""
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def errors_on(changeset) do
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Ecto.Changeset.traverse_errors(changeset, fn {message, opts} ->
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Regex.replace(~r"%{(\w+)}", message, fn _, key ->
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opts |> Keyword.get(String.to_existing_atom(key), key) |> to_string()
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end)
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end)
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end
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end
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