How to run the NixOS VM tests from nixpkgs?

1

I’m looking at https://nixcademy.com/2023/10/24/nixos-integration-tests/ and want to run some of the tests (just for playing around). That article mentions that I can nix-build -A nixosTests.bittorrent, but then I get

this path will be fetched (0.00 MiB download, 0.00 MiB unpacked):
  /nix/store/v0y1prljam02d73anilynp36gadqd8rc-vm-test-run-bittorrent
copying path '/nix/store/v0y1prljam02d73anilynp36gadqd8rc-vm-test-run-bittorrent' from 'https://cache.nixos.org'...
/nix/store/v0y1prljam02d73anilynp36gadqd8rc-vm-test-run-bittorrent

and a result symlink to that folder. The folder is empty, and the log output and the duration of the command execution suggest that the tests haven’t run yet.

2

That means the test result is cached. Try nix-build -A nixosTests.bittorrent --check to return them.

2 Likes
3

Thanks! With --check it looks good.