78 lines
2.2 KiB
Elixir
78 lines
2.2 KiB
Elixir
defmodule Aprsme.DataCase do
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@moduledoc """
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This module defines the test case to be used by
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data tests.
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You may define functions here to be used as helpers in
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your data tests. See `errors_on/2`'s definition as an example.
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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 use PostgreSQL, you
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can even run database tests asynchronously by setting
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`use Aprsme.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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alias Ecto.Adapters.SQL.Sandbox
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using do
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quote do
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import Aprsme.DataCase
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# Import conveniences for testing with connections
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import Ecto
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import Ecto.Changeset
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import Ecto.Query
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# and other functionality to make calls such as:
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# import Aprsme.DataCase
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# Aprsme.DataCase.errors_on(MySchema.changeset(%MySchema{}, %{}))
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# The default import for Repo
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alias Aprsme.Repo
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end
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end
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setup tags do
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Aprsme.DataCase.setup_sandbox(tags)
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Aprsme.DevicesSeeder.seed_from_json()
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:ok
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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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iex> errors_on(MySchema.changeset(%MySchema{}, %{field: bad_value}))
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%{field: ["has invalid value"]}
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"""
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def errors_on(changeset) do
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Ecto.Changeset.traverse_errors(changeset, &translate_error/1)
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end
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@doc """
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Sets up the sandbox and allows the test case
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to be run asynchronously.
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"""
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def setup_sandbox(tags) do
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pid = Sandbox.start_owner!(Aprsme.Repo, shared: not tags[:async])
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on_exit(fn -> Sandbox.stop_owner(pid) end)
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end
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defp translate_error({msg, opts}) do
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# You can make use of gettext to translate error messages by
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# uncommenting and adjusting the following code:
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# if count = opts[:count] do
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# Gettext.dngettext(AprsmeWeb.Gettext, "errors", msg, msg, count, opts)
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# else
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# Gettext.dgettext(AprsmeWeb.Gettext, "errors", msg, opts)
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# end
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Enum.reduce(opts, msg, fn {key, value}, acc ->
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String.replace(acc, "%{#{key}}", fn _ -> to_string(value) end)
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end)
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end
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end
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