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commanded test event handler_init_test.exs
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test/event/handler_init_test.exs

defmodule Commanded.Event.HandlerInitTest do
use Commanded.StorageCase
import Mox
alias Commanded.Event.InitHandler
alias Commanded.Helpers.ProcessHelper
alias Commanded.EventStore.Adapters.Mock, as: MockEventStore
setup do
reply_to = self()
{:ok, agent} = Agent.start_link(fn -> reply_to end, name: {:global, InitHandler})
on_exit(fn ->
ProcessHelper.shutdown(agent)
end)
end
describe "event handler `init/0` callback" do
setup do
{:ok, handler} = InitHandler.start_link()
on_exit(fn ->
ProcessHelper.shutdown(handler)
end)
[handler: handler]
end
test "should be called", %{handler: handler} do
assert_receive {:init, ^handler}
end
end
describe "event handler `init/0` callback after subscribed" do
setup do
set_mox_global()
# use mock event store adapter
default_event_store_adapter = Application.get_env(:commanded, :event_store_adapter)
:ok = Application.put_env(:commanded, :event_store_adapter, MockEventStore)
expect(MockEventStore, :subscribe_to_all_streams, fn _handler_name, handler, _subscribe_from ->
{:ok, handler}
end)
{:ok, handler} = InitHandler.start_link()
on_exit(fn ->
Application.put_env(:commanded, :event_store_adapter, default_event_store_adapter)
ProcessHelper.shutdown(handler)
end)
[handler: handler]
end
test "should be called after subscription subscribed", %{handler: handler} do
refute_receive {:init, ^handler}
simulate_subscribed(handler)
assert_receive {:init, ^handler}
end
defp simulate_subscribed(handler) do
send(handler, {:subscribed, handler})
end
end
end