{:ok, bookmark} = Bookmark.create(user.id, activity.id)
assert bookmark.user_id == user.id
assert bookmark.activity_id == activity.id
{:ok, bookmark} = Bookmark.create(user.id, activity.id)
assert bookmark.user_id == user.id
assert bookmark.activity_id == activity.id
{:ok, _bookmark} = Bookmark.create(user.id, activity.id)
{:ok, _deleted_bookmark} = Bookmark.destroy(user.id, activity.id)
{:ok, _bookmark} = Bookmark.create(user.id, activity.id)
{:ok, _deleted_bookmark} = Bookmark.destroy(user.id, activity.id)