Chronicle.Testing.Case (cratis_chronicle v3.16.1)

ExUnit.CaseTemplate that starts an isolated Chronicle.Testing.start_supervised_client/1 before each test, puts it in the test context as :chronicle, and stops it in on_exit. Safe under async: true — every test gets its own in-memory kernel and client, and start_supervised_client/1 always generates a unique event store name, so tests never see one another's events.

defmodule MyApp.AccountTest do
  use Chronicle.Testing.Case,
    event_types: [MyApp.Events.AccountOpened],
    reducers: [MyApp.Reducers.AccountReducer]

  import Chronicle.Testing.Assertions

  test "opening an account appends AccountOpened", %{chronicle: client} do
    :ok =
      Chronicle.EventSequences.EventLog.append(
        "account-1",
        %MyApp.Events.AccountOpened{},
        client: client
      )

    assert_appended(client, MyApp.Events.AccountOpened, event_source_id: "account-1")
  end
end

Accepts the same options as Chronicle.Testing.start_supervised_client/1.