@pytest.mark.parametrize
Run the same test with multiple input sets using parametrize. Each combination becomes a separate test case.
Python
Intermediate
4 min read
Parametrized Tests
Example
import pytest
@pytest.mark.parametrize("a,b,expected", [
(2, 3, 5),
(0, 0, 0),
(-1, 1, 0),
(100, -50, 50),
])
def test_add(a, b, expected):
assert a + b == expected
@pytest.mark.parametrize("email", ["notanemail", "@bad.com", ""])
def test_invalid_emails(email):
with pytest.raises(ValueError):
validate_email(email) Pro Tip
Add an id to each tuple for readable test names: (2, 3, 5, id="positive").