Sam 8df966e9c5
FEATURE: smooth streaming of AI responses on the client (#413)
This PR introduces 3 things:

1. Fake bot that can be used on local so you can test LLMs, to enable on dev use:

SiteSetting.ai_bot_enabled_chat_bots = "fake"

2. More elegant smooth streaming of progress on LLM completion

This leans on JavaScript to buffer and trickle llm results through. It also amends it so the progress dot is much 
more consistently rendered

3. It fixes the Claude dialect 

Claude needs newlines **exactly** at the right spot, amended so it is happy 

---------

Co-authored-by: Martin Brennan <martin@discourse.org>
2024-01-11 15:56:40 +11:00

97 lines
3.1 KiB
Ruby

# frozen_string_literal: true
RSpec.describe DiscourseAi::Completions::Llm do
subject(:llm) do
described_class.new(
DiscourseAi::Completions::Dialects::OrcaStyle,
canned_response,
"Upstage-Llama-2-*-instruct-v2",
)
end
fab!(:user) { Fabricate(:user) }
describe ".proxy" do
it "raises an exception when we can't proxy the model" do
fake_model = "unknown_v2"
expect { described_class.proxy(fake_model) }.to(
raise_error(DiscourseAi::Completions::Llm::UNKNOWN_MODEL),
)
end
end
describe "#generate with fake model" do
before do
DiscourseAi::Completions::Endpoints::Fake.delays = []
DiscourseAi::Completions::Endpoints::Fake.chunk_count = 10
end
let(:llm) { described_class.proxy("fake") }
it "can generate a response" do
response = llm.generate({ input: "fake prompt" }, user: user)
expect(response).to be_present
end
it "can generate content via a block" do
partials = []
response =
llm.generate({ input: "fake prompt" }, user: user) { |partial| partials << partial }
expect(partials.length).to eq(10)
expect(response).to eq(DiscourseAi::Completions::Endpoints::Fake.fake_content)
expect(partials.join).to eq(response)
end
end
describe "#generate" do
let(:prompt) do
{
insts: <<~TEXT,
I want you to act as a title generator for written pieces. I will provide you with a text,
and you will generate five attention-grabbing titles. Please keep the title concise and under 20 words,
and ensure that the meaning is maintained. Replies will utilize the language type of the topic.
TEXT
input: <<~TEXT,
Here is the text, inside <input></input> XML tags:
<input>
To perfect his horror, Caesar, surrounded at the base of the statue by the impatient daggers of his friends,
discovers among the faces and blades that of Marcus Brutus, his protege, perhaps his son, and he no longer
defends himself, but instead exclaims: 'You too, my son!' Shakespeare and Quevedo capture the pathetic cry.
</input>
TEXT
post_insts:
"Please put the translation between <ai></ai> tags and separate each title with a comma.",
}
end
let(:canned_response) do
DiscourseAi::Completions::Endpoints::CannedResponse.new(
[
"<ai>The solitary horse.,The horse etched in gold.,A horse's infinite journey.,A horse lost in time.,A horse's last ride.</ai>",
],
)
end
context "when getting the full response" do
it "processes the prompt and return the response" do
llm_response = llm.generate(prompt, user: user)
expect(llm_response).to eq(canned_response.responses[0])
end
end
context "when getting a streamed response" do
it "processes the prompt and call the given block with the partial response" do
llm_response = +""
llm.generate(prompt, user: user) { |partial, cancel_fn| llm_response << partial }
expect(llm_response).to eq(canned_response.responses[0])
end
end
end
end