66 lines
1.8 KiB
Elixir
66 lines
1.8 KiB
Elixir
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defmodule Asciinema.ModelCase do
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@moduledoc """
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This module defines the test case to be used by
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model tests.
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You may define functions here to be used as helpers in
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your model tests. See `errors_on/2`'s definition as reference.
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Finally, if the test case interacts with the database,
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it cannot be async. For this reason, every test runs
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inside a transaction which is reset at the beginning
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of the test unless the test case is marked as async.
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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 Asciinema.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 Asciinema.ModelCase
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end
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end
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setup tags do
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:ok = Ecto.Adapters.SQL.Sandbox.checkout(Asciinema.Repo)
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unless tags[:async] do
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Ecto.Adapters.SQL.Sandbox.mode(Asciinema.Repo, {:shared, self()})
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end
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:ok
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end
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@doc """
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Helper for returning list of errors in a struct when given certain data.
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## Examples
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Given a User schema that lists `:name` as a required field and validates
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`:password` to be safe, it would return:
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iex> errors_on(%User{}, %{password: "password"})
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[password: "is unsafe", name: "is blank"]
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You could then write your assertion like:
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assert {:password, "is unsafe"} in errors_on(%User{}, %{password: "password"})
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You can also create the changeset manually and retrieve the errors
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field directly:
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iex> changeset = User.changeset(%User{}, password: "password")
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iex> {:password, "is unsafe"} in changeset.errors
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true
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"""
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def errors_on(struct, data) do
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struct.__struct__.changeset(struct, data)
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|> Ecto.Changeset.traverse_errors(&Asciinema.ErrorHelpers.translate_error/1)
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|> Enum.flat_map(fn {key, errors} -> for msg <- errors, do: {key, msg} end)
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end
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end
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