testing acts_as_chat

[dmlond]

What do you recommend for an rspec/models spec of the chat model that I generate for my rails application. I would like to test that it calls acts_as_chat with the expected messages and message_class, so that future me or other devs do not remove this from the model.

[github-actions[bot]]

Test the public result of the declaration rather than expecting the macro call itself. For example, assert the configured association’s reflection.klass equals your message class and that a new record responds to ask; for custom mappings, assert the configured association and class similarly. The persistence guide documents messages: and message_class: mappings the guide.

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[ninza-innovates]

acts_as_chat stores its config in class attributes and defines a normal has_many, so you can assert those directly instead of expecting the macro call:

RSpec.describe Chat, type: :model do
  it "is a RubyLLM chat" do
    expect(Chat.ancestors).to include(RubyLLM::ActiveRecord::ChatMethods)
    expect(Chat.messages_association_name).to eq(:messages)
    expect(Chat.message_class).to eq("Message")
  end

  it "has the messages association" do
    reflection = Chat.reflect_on_association(:messages)
    expect(reflection.macro).to eq(:has_many)
    expect(reflection.klass).to eq(Message)
  end

  it { expect(Chat.new).to respond_to(:ask) }
end

If you pass custom options (acts_as_chat messages: :chat_messages, message_class: "ChatMessage"), assert those values. Message can be checked the same way: Message.chat_class and Message.ancestors.include?(RubyLLM::ActiveRecord::MessageMethods). With shoulda-matchers you can also write it { is_expected.to have_many(:messages) }.