Refactor as per Rin's suggestions, add endpoint tests

test/web/common_api/common_api_test.exs

@@ -164,4 +164,30 @@ defmodule Pleroma.Web.CommonAPI.Test do
       assert %User{info: %{pinned_activities: []}} = user
     end
   end
+
+  describe "mute tests" do
+    setup do
+      user = insert(:user)
+
+      activity = insert(:note_activity)
+
+      [user: user, activity: activity]
+    end
+
+    test "add mute", %{user: user, activity: activity} do
+      {:ok, _} = CommonAPI.add_mute(user, activity)
+      assert CommonAPI.thread_muted?(user, activity)
+    end
+
+    test "remove mute", %{user: user, activity: activity} do
+      CommonAPI.add_mute(user, activity)
+      {:ok, _} = CommonAPI.remove_mute(user, activity)
+      refute CommonAPI.thread_muted?(user, activity)
+    end
+
+    test "check that mutes can't be duplicate", %{user: user, activity: activity} do
+      CommonAPI.add_mute(user, activity)
+      {:error, _} = CommonAPI.add_mute(user, activity)
+    end
+  end
 end