Marc Philipp
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Marc Philipp
@marcphilipp.de
130 followers 94 following 20 posts
Software engineer and @junit.org team lead, Java Champion and open source enthusiast, father, husband & family person (he/him)

Website: https://marcphilipp.de
Mastodon: https://chaos.social/@marcphilipp
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marcphilipp.de
✨ New blog post: "STF Milestone 6: Improved Kotlin support"

#JUnit 6.0.0-RC1 improves JUnit's #Kotlin story by adding support for suspending functions, sequences, contracts and nullness annotations.

👉 marcphilipp.de/blog/2025/08...

Thanks to the @sovereign.tech fund for their support!
object ImprovedKotlinSupportTests { val data = sequenceOf( // Sequence<T> support arguments(1, Month.JANUARY), arguments(12, Month.DECEMBER) ) @ParameterizedTest @FieldSource("data") // suspending function support for coroutine testing suspend fun test(value: Int, month: Month?) { assertNotNull(month) // contracts to support... assertEquals(value, month.value) // smart casts! } }
August 21, 2025 at 10:38 AM
marcphilipp.de
✨ New blog post: "STF Milestone 5: Discovery issues"

Ever written a test that wasn't being executed? 😱

#JUnit 5.13 introduced a mechanism for reporting such issues found during test discovery.

👉 marcphilipp.de/blog/2025/08...

Thanks to the @sovereign.tech fund for their support!
@Test // Java int test() { return 42; } // Not executed!!! 😱😱😱
August 16, 2025 at 3:31 PM
marcphilipp.de
✨ New blog post: "STF Milestone 4: Parameterized test classes"

JUnit 5.13 introduced parameterized test classes (in addition to methods). They are a powerful testing tool that has long been missing from JUnit Jupiter...

👉 marcphilipp.de/blog/2025/06...
@ParameterizedClass @ValueSource(strings = {"foo", "bar"}) class SomeTests { @Parameter String value; @Test void shouldNotBeNull() { assertNotNull(value); } @Test void lengthShouldBeThree() { assertEquals(3, value.length()); } }
June 7, 2025 at 11:52 AM
marcphilipp.de
✨ New blog post: "STF Milestone 3: Release verification and automation"

A major goal of the Sovereign Tech Fund is to help projects become more sustainable. For #JUnit, one activity in desperate need of improvement in this area was performing a release.

marcphilipp.de/blog/2025/04...
screenshot of GitHub Actions workflow chart
April 1, 2025 at 11:28 AM
marcphilipp.de
Together with @[email protected], I will be hosting a workshop at @[email protected] in Cologne on May 12. As you might have guessed, it's about "Catching up with #JUnit 5". See you there?
schedule.jcon.one/session/837895

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Promotional image for "Catching up with JUnit 5" workshop by Marc Philipp and Christian Stein at JCON 2025 featuring their avatars and a bunch of logos.
March 25, 2025 at 3:06 PM