[Solved] Identify the error in this regression test code snippet for a Langchain chain my_chain:input_data = {"query": "Hello"} expected = {"answer": "Hi"} result = my_chain.... | LangChain

LangChain - Evaluation and Testing

Identify the error in this regression test code snippet for a Langchain chain my_chain:

input_data = {"query": "Hello"}
expected = {"answer": "Hi"}
result = my_chain.invoke(input_data) == expected
print(result)

Assuming my_chain.invoke returns {"response": "Hi"}, what is the problem?

AThe print statement syntax is wrong

BThe input_data dictionary is missing required keys

CThe invoke method is called incorrectly

DThe expected output keys do not match the actual output keys

Step-by-Step Solution

Solution:

Step 1: Compare expected and actual output keys
Expected output has key "answer" but actual output has key "response".
Step 2: Understand impact on regression test
Mismatch in keys causes the equality check to fail, so test result is False.
Final Answer:
The expected output keys do not match the actual output keys -> Option D
Quick Check:
Output keys mismatch causes test failure [OK]

Quick Trick: Check keys in expected vs actual output carefully [OK]

Common Mistakes:

MISTAKES

Master "Evaluation and Testing" in LangChain

9 interactive learning modes - each teaches the same concept differently

More LangChain Quizzes

Identify the error in this regression test code snippet for a Langchain chain my_chain: