[Solved] What will be the result of this pytest code snippet?import warnings import pytest def func(): warnings.warn('Deprecated feature', DeprecationWarning) def test_func(): with pytest.... | PyTest

PyTest - Writing Assertions

What will be the result of this pytest code snippet?

import warnings
import pytest

def func():
    warnings.warn('Deprecated feature', DeprecationWarning)

def test_func():
    with pytest.warns(DeprecationWarning) as record:
        func()
    assert len(record) == 1
    assert record[0].message.args[0] == 'Deprecated feature'

ATest fails because no warning is raised

BTest passes because the warning is correctly caught and message matches

CTest fails due to wrong warning type

DTest raises an exception because record is not iterable

Step-by-Step Solution

Solution:

Step 1: Analyze the warning raised by func()
The function func() raises a DeprecationWarning with message 'Deprecated feature'.
Step 2: Check pytest.warns usage and assertions
The test uses pytest.warns to catch DeprecationWarning and stores it in record. It asserts one warning was caught and the message matches exactly.
Final Answer:
Test passes because the warning is correctly caught and message matches -> Option B
Quick Check:
Warning caught and message correct = A [OK]

Quick Trick: Check warning type and message inside pytest.warns block [OK]

Common Mistakes:

MISTAKES

Assuming warnings.warn does not raise warnings
Confusing warning types
Not using 'as record' to capture warnings

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What will be the result of this pytest code snippet?

Step 1: Analyze the warning raised by func()

Step 2: Check pytest.warns usage and assertions

Final Answer:

Quick Check:

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