What are the best practices for parameterized testing?

What are the best practices for parameterized testing?

Parameterized testing allows you to run the same test with different inputs. Best practices include using clear naming conventions, keeping test cases independent, and ensuring that the parameters cover a wide range of scenarios.

Can you give me an example of how to implement parameterized tests?

Sure! In JUnit, you can use the @ParameterizedTest annotation along with @MethodSource to provide parameters. Here's a simple example:

@ParameterizedTest
@MethodSource("provideNumbers")
void testAddition(int a, int b, int expected) {
    assertEquals(expected, a + b);
}

static Stream<Arguments> provideNumbers() {
    return Stream.of(
        Arguments.of(1, 1, 2),
        Arguments.of(2, 3, 5),
        Arguments.of(5, 5, 10)
    );
}

What tools can I use for parameterized testing?

You can use various tools depending on your programming language. For Java, JUnit is popular; for Python, you can use pytest; and for JavaScript, Jest is a great choice.

How do I ensure my parameterized tests are maintainable?

To ensure maintainability, keep your test cases concise, document the purpose of each parameter set, and regularly review and refactor your tests as your codebase evolves.