shibao
1e55039a67
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72 lines
2.1 KiB
Elixir
72 lines
2.1 KiB
Elixir
defmodule Memex.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 Memex.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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alias Memex.Repo
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import Ecto
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import Ecto.{Changeset, Query}
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import Memex.{DataCase, Fixtures}
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end
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end
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setup tags do
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pid = Sandbox.start_owner!(Memex.Repo, shared: not tags[:async])
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on_exit(fn -> Sandbox.stop_owner(pid) end)
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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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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 _capture, 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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@doc """
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Generates a random string of any length, default of 12
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"""
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@spec random_string(length :: non_neg_integer()) :: String.t()
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def random_string(length \\ 12) do
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:crypto.strong_rand_bytes(length) |> Base.url_encode64() |> binary_part(0, length)
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end
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def unique_user_email, do: "user#{System.unique_integer()}@example.com"
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def valid_user_password, do: "hello world!"
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def random_slug(length \\ 20) do
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symbols = ~c"0123456789abcdef-"
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symbol_count = Enum.count(symbols)
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for _index <- 1..length//1,
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into: "",
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do: <<Enum.at(symbols, :rand.uniform(symbol_count - 1))>>
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end
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end
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