[Solved] You want to run a test with parameters mode set to 'fast', 'slow', and 'medium'.... Which is the correct way to write this conditional parametrize in pytest? | PyTest

PyTest - Parametrize

You want to run a test with parameters mode set to 'fast', 'slow', and 'medium'. However, you want to skip the 'slow' mode test only if an environment variable SKIP_SLOW is set to '1'. Which is the correct way to write this conditional parametrize in pytest?

Aimport os @pytest.mark.parametrize('mode', [ 'fast', pytest.param('slow', marks=pytest.mark.skipif('os.getenv("SKIP_SLOW") == "1"')), 'medium' ])

Bimport os @pytest.mark.parametrize('mode', [ 'fast', pytest.param('slow', skipif=os.getenv('SKIP_SLOW') == '1'), 'medium' ])

Cimport os @pytest.mark.parametrize('mode', [ 'fast', pytest.param('slow', marks=pytest.skipif(os.getenv('SKIP_SLOW') == '1')), 'medium' ])

Dimport os @pytest.mark.parametrize('mode', [ 'fast', pytest.param('slow', marks=pytest.mark.skipif(os.getenv('SKIP_SLOW') == '1', reason='Skip slow mode')), 'medium' ])

Step-by-Step Solution

Solution:

Step 1: Use os.getenv to check environment variable
os.getenv('SKIP_SLOW') returns the value of the environment variable as a string.
Step 2: Apply skipif mark correctly
Use pytest.mark.skipif with a boolean condition and a reason inside marks parameter of pytest.param.
Step 3: Verify syntax correctness
import os @pytest.mark.parametrize('mode', [ 'fast', pytest.param('slow', marks=pytest.mark.skipif(os.getenv('SKIP_SLOW') == '1', reason='Skip slow mode')), 'medium' ]) correctly uses marks=pytest.mark.skipif(condition, reason='...') and imports os.
Final Answer:
import os @pytest.mark.parametrize('mode', [ 'fast', pytest.param('slow', marks=pytest.mark.skipif(os.getenv('SKIP_SLOW') == '1', reason='Skip slow mode')), 'medium' ]) -> Option D
Quick Check:
Use marks=pytest.mark.skipif with env check and reason [OK]

Quick Trick: Use os.getenv and marks=pytest.mark.skipif with reason to skip params [OK]

Common Mistakes:

MISTAKES

Passing skipif as direct argument instead of marks
Using string condition instead of boolean
Omitting reason in skipif mark

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Which is the correct way to write this conditional parametrize in pytest?

Step 1: Use os.getenv to check environment variable

Step 2: Apply skipif mark correctly

Step 3: Verify syntax correctness

Final Answer:

Quick Check:

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