[Solved] You want to test a function is_even_sum(a, b) that re... Which @pytest.mark.parametrize setup with a single decorator correctly tests all combinations of a from [1, 2] and b from [3, 4] respectively? | PyTest

PyTest - Parametrize

You want to test a function is_even_sum(a, b) that returns True if the sum of a and b is even. Which @pytest.mark.parametrize setup with a single decorator correctly tests all combinations of a from [1, 2] and b from [3, 4] respectively?

A@pytest.mark.parametrize('a', [1, 2]) @pytest.mark.parametrize('b', [3, 4])

B@pytest.mark.parametrize('a, b', [(1, 2), (3, 4)])

C@pytest.mark.parametrize('a, b', [(1, 3), (1, 4), (2, 3), (2, 4)])

D@pytest.mark.parametrize('a, b', [(1, 3), (2, 4)])

Step-by-Step Solution

Solution:

Step 1: Understand the need to test all combinations
We want to test every pair from a=[1,2] and b=[3,4], so all 4 pairs must be covered.
Step 2: Recognize the benefit of multiple parameters
@pytest.mark.parametrize('a, b', [(1, 3), (1, 4), (2, 3), (2, 4)]) lists all pairs explicitly: (1,3), (1,4), (2,3), (2,4).
Final Answer:
@pytest.mark.parametrize('a, b', [(1, 3), (1, 4), (2, 3), (2, 4)]) -> Option C
Quick Check:
All pairs listed explicitly [OK]

Quick Trick: List all pairs explicitly for full coverage [OK]

Common Mistakes:

MISTAKES

Missing some pairs in the list
Using separate decorators without knowing cartesian product effect
Confusing parameter order or values

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Which @pytest.mark.parametrize setup with a single decorator correctly tests all combinations of a from [1, 2] and b from [3, 4] respectively?

Step 1: Understand the need to test all combinations

Step 2: Recognize the benefit of multiple parameters

Final Answer:

Quick Check:

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