test(test_caching.py): add disk cache test when using completion

litellm/tests/test_caching.py

@@ -875,6 +875,66 @@ async def test_redis_cache_acompletion_stream_bedrock():
         print(e)
         raise e
 
+def test_disk_cache_completion():
+    litellm.set_verbose = False
+
+    random_number = random.randint(
+        1, 100000
+    )  # add a random number to ensure it's always adding / reading from cache
+    messages = [
+        {"role": "user", "content": f"write a one sentence poem about: {random_number}"}
+    ]
+    litellm.cache = Cache(
+        type="disk",
+    )
+    print("test2 for Redis Caching - non streaming")
+    response1 = completion(
+        model="gpt-3.5-turbo", messages=messages, caching=True, max_tokens=20
+    )
+    response2 = completion(
+        model="gpt-3.5-turbo", messages=messages, caching=True, max_tokens=20
+    )
+    response3 = completion(
+        model="gpt-3.5-turbo", messages=messages, caching=True, temperature=0.5
+    )
+
+    print("\nresponse 1", response1)
+    print("\nresponse 2", response2)
+    print("\nresponse 3", response3)
+    # print("\nresponse 4", response4)
+    litellm.cache = None
+    litellm.success_callback = []
+    litellm._async_success_callback = []
+
+    """
+    1 & 2 should be exactly the same 
+    1 & 3 should be different, since input params are diff
+    1 & 4 should be diff, since models are diff
+    """
+    if (
+        response1["choices"][0]["message"]["content"]
+        != response2["choices"][0]["message"]["content"]
+    ):  # 1 and 2 should be the same
+        # 1&2 have the exact same input params. This MUST Be a CACHE HIT
+        print(f"response1: {response1}")
+        print(f"response2: {response2}")
+        pytest.fail(f"Error occurred:")
+    if (
+        response1["choices"][0]["message"]["content"]
+        == response3["choices"][0]["message"]["content"]
+    ):
+        # if input params like seed, max_tokens are diff it should NOT be a cache hit
+        print(f"response1: {response1}")
+        print(f"response3: {response3}")
+        pytest.fail(
+            f"Response 1 == response 3. Same model, diff params shoudl not cache Error"
+            f" occurred:"
+        )
+
+    assert response1.id == response2.id
+    assert response1.created == response2.created
+    assert response1.choices[0].message.content == response2.choices[0].message.content
+
 
 @pytest.mark.skip(reason="AWS Suspended Account")
 @pytest.mark.asyncio