Add entry to @context, tests

Signed-off-by: marcin mikołajczak <git@mkljczk.pl>

test/support/http_request_mock.ex

@@ -1464,6 +1464,24 @@ defmodule HttpRequestMock do
      }}
   end
 
+  def get("https://friends.grishka.me/posts/54642", _, _, _) do
+    {:ok,
+     %Tesla.Env{
+       status: 200,
+       body: File.read!("test/fixtures/tesla_mock/smithereen_non_anonymous_poll.json"),
+       headers: activitypub_object_headers()
+     }}
+  end
+
+  def get("https://friends.grishka.me/users/1", _, _, _) do
+    {:ok,
+     %Tesla.Env{
+       status: 200,
+       body: File.read!("test/fixtures/tesla_mock/smithereen_user.json"),
+       headers: activitypub_object_headers()
+     }}
+  end
+
   def get(url, query, body, headers) do
     {:error,
      "Mock response not implemented for GET #{inspect(url)}, #{query}, #{inspect(body)}, #{inspect(headers)}"}