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import pytest
from llama_index.core.llms import ChatMessage, MessageRole
from private_gpt.components.llm.prompt_helper import (
ChatMLPromptStyle,
DefaultPromptStyle,
Llama2PromptStyle,
MistralPromptStyle,
TagPromptStyle,
get_prompt_style,
)
@pytest.mark.parametrize(
("prompt_style", "expected_prompt_style"),
[
("default", DefaultPromptStyle),
("llama2", Llama2PromptStyle),
("tag", TagPromptStyle),
("mistral", MistralPromptStyle),
("chatml", ChatMLPromptStyle),
],
)
def test_get_prompt_style_success(prompt_style, expected_prompt_style):
assert isinstance(get_prompt_style(prompt_style), expected_prompt_style)
def test_get_prompt_style_failure():
prompt_style = "unknown"
with pytest.raises(ValueError) as exc_info:
get_prompt_style(prompt_style)
assert str(exc_info.value) == f"Unknown prompt_style='{prompt_style}'"
def test_tag_prompt_style_format():
prompt_style = TagPromptStyle()
messages = [
ChatMessage(content="You are an AI assistant.", role=MessageRole.SYSTEM),
ChatMessage(content="Hello, how are you doing?", role=MessageRole.USER),
]
expected_prompt = (
"<|system|>: You are an AI assistant.\n"
"<|user|>: Hello, how are you doing?\n"
"<|assistant|>: "
)
assert prompt_style.messages_to_prompt(messages) == expected_prompt
def test_tag_prompt_style_format_with_system_prompt():
prompt_style = TagPromptStyle()
messages = [
ChatMessage(
content="FOO BAR Custom sys prompt from messages.", role=MessageRole.SYSTEM
),
ChatMessage(content="Hello, how are you doing?", role=MessageRole.USER),
]
expected_prompt = (
"<|system|>: FOO BAR Custom sys prompt from messages.\n"
"<|user|>: Hello, how are you doing?\n"
"<|assistant|>: "
)
assert prompt_style.messages_to_prompt(messages) == expected_prompt
def test_mistral_prompt_style_format():
prompt_style = MistralPromptStyle()
messages = [
ChatMessage(content="You are an AI assistant.", role=MessageRole.SYSTEM),
ChatMessage(content="Hello, how are you doing?", role=MessageRole.USER),
]
expected_prompt = (
"<s>[INST] You are an AI assistant. [/INST]</s>"
"[INST] Hello, how are you doing? [/INST]"
)
assert prompt_style.messages_to_prompt(messages) == expected_prompt
def test_chatml_prompt_style_format():
prompt_style = ChatMLPromptStyle()
messages = [
ChatMessage(content="You are an AI assistant.", role=MessageRole.SYSTEM),
ChatMessage(content="Hello, how are you doing?", role=MessageRole.USER),
]
expected_prompt = (
"<|im_start|>system\n"
"You are an AI assistant.<|im_end|>\n"
"<|im_start|>user\n"
"Hello, how are you doing?<|im_end|>\n"
"<|im_start|>assistant\n"
)
assert prompt_style.messages_to_prompt(messages) == expected_prompt
def test_llama2_prompt_style_format():
prompt_style = Llama2PromptStyle()
messages = [
ChatMessage(content="You are an AI assistant.", role=MessageRole.SYSTEM),
ChatMessage(content="Hello, how are you doing?", role=MessageRole.USER),
]
expected_prompt = (
"<s> [INST] <<SYS>>\n"
" You are an AI assistant. \n"
"<</SYS>>\n"
"\n"
" Hello, how are you doing? [/INST]"
)
assert prompt_style.messages_to_prompt(messages) == expected_prompt
def test_llama2_prompt_style_with_system_prompt():
prompt_style = Llama2PromptStyle()
messages = [
ChatMessage(
content="FOO BAR Custom sys prompt from messages.", role=MessageRole.SYSTEM
),
ChatMessage(content="Hello, how are you doing?", role=MessageRole.USER),
]
expected_prompt = (
"<s> [INST] <<SYS>>\n"
" FOO BAR Custom sys prompt from messages. \n"
"<</SYS>>\n"
"\n"
" Hello, how are you doing? [/INST]"
)
assert prompt_style.messages_to_prompt(messages) == expected_prompt
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