How do I implement parameterized tests in my code?

How do I implement parameterized tests in my code?

You can implement parameterized tests using testing frameworks like JUnit in Java or pytest in Python. Would you like an example?

Yes, please provide an example in Python.

Sure! In pytest, you can use the @pytest.mark.parametrize decorator. Here's a simple example:

import pytest

def add(a, b):
    return a + b

@pytest.mark.parametrize('a, b, expected', [
    (1, 2, 3),
    (2, 3, 5),
    (5, 5, 10)
])
def test_add(a, b, expected):
    assert add(a, b) == expected

What if I want to use it in Java with JUnit?

In JUnit, you can use the @ParameterizedTest annotation along with @MethodSource or @CsvSource. Here's an example:

import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.CsvSource;
import static org.junit.jupiter.api.Assertions.assertEquals;

public class CalculatorTest {
    @ParameterizedTest
    @CsvSource({"1, 2, 3", "2, 3, 5", "5, 5, 10"})
    void testAdd(int a, int b, int expected) {
        assertEquals(expected, add(a, b));
    }

    int add(int a, int b) {
        return a + b;
    }
}