Graham McIntire
b8a255ac91
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- nix/wgrib2.nix: build wgrib2 3.8.0 from source with NCEPLIBS-g2c 2.3.0, matching the Dockerfile.base build. - flake.nix: wire wgrib2 derivation into dev shell so direnv loads it. - DataCase: call Req.Test.set_req_test_from_context/1 in setup so async:false tests get shared Req.Test mode, making stubs visible to Tasks spawned by async_stream_nolink.
113 lines
3.6 KiB
Elixir
113 lines
3.6 KiB
Elixir
defmodule Microwaveprop.DataCase do
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@moduledoc """
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Test case template for tests that need database access.
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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 Microwaveprop.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 Ecto
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import Ecto.Changeset
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import Ecto.Query
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import Microwaveprop.DataCase
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alias Microwaveprop.Repo
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end
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end
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setup tags do
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Microwaveprop.DataCase.setup_sandbox(tags)
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Microwaveprop.DataCase.reset_score_files()
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Microwaveprop.DataCase.stub_nexrad_default()
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# sync tests (async: false) need shared Req.Test mode so stubs
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# are visible to Tasks spawned by async_stream_nolink.
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Req.Test.set_req_test_from_context(tags)
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:ok
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end
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@doc """
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Installs a default 404 stub for the IEM NEXRAD client so tests that
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trigger `CommonVolumeRadarWorker` via `enqueue_for_contact/1` don't
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crash for lack of a Req.Test plug. Individual tests can override with
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their own `Req.Test.stub/2`.
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"""
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@spec stub_nexrad_default :: :ok
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def stub_nexrad_default do
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Req.Test.stub(Microwaveprop.Weather.NexradClient, fn conn ->
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Plug.Conn.send_resp(conn, 404, "not found")
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end)
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end
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@doc """
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Sets up the sandbox based on the test tags. Returns the owner pid so
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callers (e.g. `MicrowavepropWeb.ConnCase`) can build Ecto Sandbox
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metadata for out-of-process access (LiveView's connected mount).
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"""
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@spec setup_sandbox(map()) :: pid()
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def setup_sandbox(tags) do
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shared? = not tags[:async]
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pid = Sandbox.start_owner!(Microwaveprop.Repo, shared: shared?)
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on_exit(fn ->
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Sandbox.stop_owner(pid)
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# Ecto reverts the pool to :manual mode when a `{:shared, pid}`
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# owner terminates (see Ecto.Adapters.SQL.Sandbox docs). Since
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# test_helper.exs relies on global :auto mode so Oban's
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# background plugins (Stager, Peers, Met.Reporter) can
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# auto-checkout, every `async: false` test permanently flips the
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# pool to :manual once it exits — starving those processes of
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# connections and crash-looping Oban until it exceeds its
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# restart intensity and takes the whole app (and Repo) down with
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# it. Restore :auto after any shared owner exits.
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if shared?, do: Sandbox.mode(Microwaveprop.Repo, :auto)
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end)
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pid
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end
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@doc """
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Wipe the propagation ScoresFile tree between tests so files don't
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leak between cases sharing the same tmp dir.
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"""
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@spec reset_score_files :: :ok
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def reset_score_files do
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dir = Application.get_env(:microwaveprop, :propagation_scores_dir)
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if is_binary(dir) do
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File.rm_rf(dir)
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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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@spec errors_on(Ecto.Changeset.t()) :: map()
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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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