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# Mock Requests
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For testing purposes, you can use `mock_completion()` to mock calling the completion endpoint.
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For testing purposes, you can use `completion()` with `mock_response` to mock calling the completion endpoint.
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This will return a response object with a default response (works for streaming as well), without calling the LLM APIs.
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## quick start
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```python
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from litellm import mock_completion
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from litellm import completion
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model = "gpt-3.5-turbo"
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messages = [{"role":"user", "content":"This is a test request"}]
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mock_completion(model=model, messages=messages)
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completion(model=model, messages=messages, mock_response="It's simple to use and easy to get started")
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```
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## streaming
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```python
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from litellm import completion
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model = "gpt-3.5-turbo"
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messages = [{"role": "user", "content": "Hey, I'm a mock request"}]
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response = litellm.mock_completion(model=model, messages=messages, stream=True)
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response = completion(model=model, messages=messages, stream=True, mock_response="It's simple to use and easy to get started")
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for chunk in response:
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print(chunk) # {'choices': [{'delta': {'role': 'assistant', 'content': 'Thi'}, 'finish_reason': None}]}
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complete_response += chunk["choices"][0]["delta"]["content"]
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Trying to test making LLM Completion calls without calling the LLM APIs ?
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Pass `mock_response` to `litellm.completion` and litellm will directly return the response without neededing the call the LLM API and spend $$
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## Using `mock_response`
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## Using `completion()` with `mock_response`
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```python
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from litellm import completion
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messages = [{"role":"user", "content":"Why is LiteLLM amazing?"}]
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completion(model=model, messages=messages, mock_response="It's simple to use and easy to get started")
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```
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```
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## Building a pytest function using `completion`
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```python
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from litellm import completion
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import pytest
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def test_completion_openai():
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try:
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response = completion(
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model="gpt-3.5-turbo",
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messages=[{"role":"user", "content":"Why is LiteLLM amazing?"}],
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mock_response="LiteLLM is awesome"
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)
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# Add any assertions here to check the response
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print(response)
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print(response['choices'][0]['finish_reason'])
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except Exception as e:
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pytest.fail(f"Error occurred: {e}")
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```
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