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+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.MastodonAPI.ConversationViewTest do
+  use Pleroma.DataCase
+
+  alias Pleroma.Conversation.Participation
+  alias Pleroma.Web.CommonAPI
+  alias Pleroma.Web.MastodonAPI.ConversationView
+
+  import Pleroma.Factory
+
+  test "represents a Mastodon Conversation entity" do
+    user = insert(:user)
+    other_user = insert(:user)
+
+    {:ok, parent} = CommonAPI.post(user, %{status: "parent"})
+
+    {:ok, activity} =
+      CommonAPI.post(user, %{
+        status: "hey @#{other_user.nickname}",
+        visibility: "direct",
+        in_reply_to_id: parent.id
+      })
+
+    {:ok, _reply_activity} =
+      CommonAPI.post(user, %{status: "hu", visibility: "public", in_reply_to_id: parent.id})
+
+    [participation] = Participation.for_user_with_last_activity_id(user)
+
+    assert participation
+
+    conversation =
+      ConversationView.render("participation.json", %{participation: participation, for: user})
+
+    assert conversation.id == participation.id |> to_string()
+    assert conversation.last_status.id == activity.id
+
+    assert [account] = conversation.accounts
+    assert account.id == other_user.id
+    assert conversation.last_status.pleroma.direct_conversation_id == participation.id
+  end
+end