You want to test a function that returns a list of even numbers from 1 to 5. Which assert statement with a message best helps debug if the test fails?

hard🚀 Application Q15 of 15

PyTest - Writing Assertions

def get_evens():
    return [2, 4]

def test_evens():
    result = get_evens()
    # Choose the best assert with message

Aassert result == [2, 4], "Check the function"

Bassert result == [2, 4], "Test failed"

Cassert result == [2, 4], f"Expected [2, 4], got {result}"

Dassert result == [2, 4], f"Result is {result}"

Step-by-Step Solution

Solution:

Step 1: Understand the purpose of assert messages
Good messages explain exactly what was expected and what was received to help debugging.
Step 2: Compare options for clarity
assert result == [2, 4], f"Expected [2, 4], got {result}" uses an f-string to show both expected and actual results clearly, aiding quick diagnosis.
Final Answer:
assert result == [2, 4], f"Expected [2, 4], got {result}" -> Option C
Quick Check:
Clear message shows expected vs actual [OK]

Quick Trick: Show expected and actual values in assert message [OK]

Common Mistakes:

MISTAKES

Using vague messages without details
Not showing actual result in message
Ignoring helpful f-string formatting

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More PyTest Quizzes

You want to test a function that returns a list of even numbers from 1 to 5. Which assert statement with a message best helps debug if the test fails?

Step 1: Understand the purpose of assert messages

Step 2: Compare options for clarity

Final Answer:

Quick Check:

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