@ c4


Our next meetup will be all around testing. You can enjoy some drinks, meet nice people and collaboratively solve simple programming problems in rust.

All you need is:

  • some programming skills
  • interest in pair programming
  • if possible: your own notebook with Rust and your favourite editor (because shortcuts, keyboard layouts etc. can differ a lot)
  • and since this is a social event (not a competition): good manners as in the Rust Code of Conduct ;-)

Detailed Schedule

  • Introducing everyone
  • Short talk about testing in Rust
  • Forming pairs & Assigning problems
  • Round 1 (pairs): Writing test cases for the problem
  • Presentation of test cases to the group for feedback on clarity
  • (Optional: Switch problems between pairs, to make it more interesting)
  • Round 2 (pairs): Writing implementations, which satisfy the tests
  • Presentation and discussion of results


  • We will try to select easy problems, supposed to be solvable in roughly 15-30 minutes by novices with only basic Rust experience.
  • Some experienced Rust programmers will act as mentors during the two pair programming rounds. These mentors will not participate in pairs themselves, but answer questions and provide tips.
  • If you like to join this meetup, please let us know at meetup.com. We are looking forward to see you. :-)
  • The meetup will likely be held in German, we will however reevaluate this at the meetup and may switch to English if needed.
  1. Testing with Rust

Location: Chaos Computer Club Cologne (c4) e.V.

Heliosstr. 6a


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  • Via subway lines 3, 4, or 13 to “Venloer Straße/Gürtel” (exit the station towards “Heliosstr./Bezirksverwaltung”)
  • Via bus lines 141, 142, or 143 to “Venloer Straße/Gürtel”
  • Via train to “Köln-Ehrenfeld” (exit the station towards “Venloer Straße”)

Cross Venloer Straße and go into Heliosstraße. After 2–3min you arrive at the last building before a construction site (on the right side). Entrance is next to the parking spots.