Add test for mastodon API /favourites endpoint

test/web/mastodon_api/mastodon_api_controller_test.exs

@@ -1349,13 +1349,42 @@ defmodule Pleroma.Web.MastodonAPI.MastodonAPIControllerTest do
 
     {:ok, _, _} = CommonAPI.favorite(activity.id, user)
 
-    conn =
+    first_conn =
       conn
       |> assign(:user, user)
       |> get("/api/v1/favourites")
 
-    assert [status] = json_response(conn, 200)
+    assert [status] = json_response(first_conn, 200)
     assert status["id"] == to_string(activity.id)
+
+    assert [{"link", link_header}] =
+             Enum.filter(first_conn.resp_headers, fn element -> match?({"link", _}, element) end)
+
+    # Honours query params
+    {:ok, second_activity} =
+      CommonAPI.post(other_user, %{
+        "status" =>
+          "Trees Are Never Sad Look At Them Every Once In Awhile They're Quite Beautiful."
+      })
+
+    {:ok, _, _} = CommonAPI.favorite(second_activity.id, user)
+
+    last_like = status["id"]
+
+    second_conn =
+      conn
+      |> assign(:user, user)
+      |> get("/api/v1/favourites?since_id=#{last_like}")
+
+    assert [second_status] = json_response(second_conn, 200)
+    assert second_status["id"] == to_string(second_activity.id)
+
+    third_conn =
+      conn
+      |> assign(:user, user)
+      |> get("/api/v1/favourites?limit=0")
+
+    assert [] = json_response(third_conn, 200)
   end
 
   describe "updating credentials" do