lib/baz/test_support/factories/collection_factory.ex
defmodule Baz.TestSupport.Factories.CollectionFactory do
@spec create_collection(map) :: {:ok, Ecto.Schema.t()} | {:error, Ecto.Changeset.t()}
def create_collection(attrs) do
%Baz.Collections.Collection{}
|> Baz.Collections.Collection.changeset(attrs)
|> Baz.Repo.insert()
end
end