Greedy Approach
demo-unit-testingFrontend-only demo — nothing is graded for real

Your first day: finish calculate_sum

A guided tour of the workspace, a quick lesson on unit tests, and your first real change — all without leaving the browser.

This demo works best on a larger screen.

README.md

Preview

Welcome to the team 👋

Your first task at TinyCalc Inc. is small but important.

Our lead engineer left calculate_sum half-finished in calculator.py before going on vacation. It should add two numbers together, but right now it always returns 0.

The good news: our test suite already defines exactly what "done" means. Open test_calculator.py to see the two tests we must satisfy.

Your job:

  1. Finish calculate_sum in calculator.py.
  2. Bonus: add a print(...) so you can see what's happening.
  3. Press Run tests — the tests will confirm your change.

That's the whole idea behind this platform: read the code, make a small, safe change, and let the tests confirm it.