refactor: move all testing to top-level of repo

Closes https://github.com/BerriAI/litellm/issues/486

tests/local_testing/test_mock_request.py

@@ -0,0 +1,94 @@
+#### What this tests ####
+#    This tests mock request calls to litellm
+
+import os
+import sys
+import traceback
+
+import pytest
+
+sys.path.insert(
+    0, os.path.abspath("../..")
+)  # Adds the parent directory to the system path
+import litellm
+
+
+def test_mock_request():
+    try:
+        model = "gpt-3.5-turbo"
+        messages = [{"role": "user", "content": "Hey, I'm a mock request"}]
+        response = litellm.mock_completion(model=model, messages=messages, stream=False)
+        print(response)
+        print(type(response))
+    except:
+        traceback.print_exc()
+
+
+# test_mock_request()
+def test_streaming_mock_request():
+    try:
+        model = "gpt-3.5-turbo"
+        messages = [{"role": "user", "content": "Hey, I'm a mock request"}]
+        response = litellm.mock_completion(model=model, messages=messages, stream=True)
+        complete_response = ""
+        for chunk in response:
+            complete_response += chunk["choices"][0]["delta"]["content"] or ""
+        if complete_response == "":
+            raise Exception("Empty response received")
+    except:
+        traceback.print_exc()
+
+
+# test_streaming_mock_request()
+
+
+@pytest.mark.asyncio()
+async def test_async_mock_streaming_request():
+    generator = await litellm.acompletion(
+        messages=[{"role": "user", "content": "Why is LiteLLM amazing?"}],
+        mock_response="LiteLLM is awesome",
+        stream=True,
+        model="gpt-3.5-turbo",
+    )
+    complete_response = ""
+    async for chunk in generator:
+        print(chunk)
+        complete_response += chunk["choices"][0]["delta"]["content"] or ""
+
+    assert (
+        complete_response == "LiteLLM is awesome"
+    ), f"Unexpected response got {complete_response}"
+
+
+def test_mock_request_n_greater_than_1():
+    try:
+        model = "gpt-3.5-turbo"
+        messages = [{"role": "user", "content": "Hey, I'm a mock request"}]
+        response = litellm.mock_completion(model=model, messages=messages, n=5)
+        print("response: ", response)
+
+        assert len(response.choices) == 5
+        for choice in response.choices:
+            assert choice.message.content == "This is a mock request"
+
+    except:
+        traceback.print_exc()
+
+
+@pytest.mark.asyncio()
+async def test_async_mock_streaming_request_n_greater_than_1():
+    generator = await litellm.acompletion(
+        messages=[{"role": "user", "content": "Why is LiteLLM amazing?"}],
+        mock_response="LiteLLM is awesome",
+        stream=True,
+        model="gpt-3.5-turbo",
+        n=5,
+    )
+    complete_response = ""
+    async for chunk in generator:
+        print(chunk)
+        # complete_response += chunk["choices"][0]["delta"]["content"] or ""
+
+    # assert (
+    #     complete_response == "LiteLLM is awesome"
+    # ), f"Unexpected response got {complete_response}"