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add VM test for nix upgrade-nix

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This commit adds a new NixOS VM test, which tests that `nix upgrade-nix`
works on both kinds of profiles (manifest.nix and manifest.json).

Done as a separate commit from 831d18a13, since it relies on the
--store-path argument from 026c90e5f as well.

Change-Id: I5fc94b751d252862cb6cffb541a4c072faad9f3b
This commit is contained in:
Qyriad 2024-04-28 17:23:31 -06:00
parent ee5a1b5a4c
commit e2ab89a74b
2 changed files with 82 additions and 0 deletions
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2
tests/nixos/default.nix
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@ -141,6 +141,8 @@ in
nix-copy = runNixOSTestFor "x86_64-linux" ./nix-copy.nix;
nix-upgrade-nix = runNixOSTestFor "x86_64-linux" ./nix-upgrade-nix.nix;
nssPreload = runNixOSTestFor "x86_64-linux" ./nss-preload.nix;
githubFlakes = runNixOSTestFor "x86_64-linux" ./github-flakes.nix;

80
tests/nixos/nix-upgrade-nix.nix Normal file
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@ -0,0 +1,80 @@
{ lib, config, ... }:
/**
* Test that nix upgrade-nix works regardless of whether /nix/var/nix/profiles/default
* is a nix-env style profile or a nix profile style profile.
*/
let
pkgs = config.nodes.machine.nixpkgs.pkgs;
lix = pkgs.nix;
lixVersion = lib.getVersion lix;
newNix = pkgs.nixVersions.unstable;
newNixVersion = lib.getVersion newNix;
in {
name = "nix-upgrade-nix";
nodes = {
machine = { config, lib, pkgs, ... }: {
virtualisation.writableStore = true;
virtualisation.additionalPaths = [ pkgs.hello.drvPath ];
nix.settings.substituters = lib.mkForce [ ];
nix.settings.experimental-features = [ "nix-command" "flakes" ];
services.getty.autologinUser = "root";
};
};
testScript = { nodes }: ''
# fmt: off
start_all()
machine.succeed("nix --version >&2")
# Install Lix into the default profile, overriding /run/current-system/sw/bin/nix,
# and thus making Lix think we're not on NixOS.
machine.succeed("nix-env --install '${lib.getBin lix}' --profile /nix/var/nix/profiles/default >&2")
# Make sure that correctly got inserted into our PATH.
default_profile_nix_path = machine.succeed("command -v nix")
print(default_profile_nix_path)
assert default_profile_nix_path.strip() == "/nix/var/nix/profiles/default/bin/nix", \
f"{default_profile_nix_path.strip()=} != /nix/var/nix/profiles/default/bin/nix"
# And that it's the Nix we specified.
default_profile_version = machine.succeed("nix --version")
assert "${lixVersion}" in default_profile_version, f"${lixVersion} not in {default_profile_version}"
# Upgrade to a different version of Nix, and make sure that also worked.
machine.succeed("nix upgrade-nix --store-path ${newNix} >&2")
default_profile_version = machine.succeed("nix --version")
print(default_profile_version)
assert "${newNixVersion}" in default_profile_version, f"${newNixVersion} not in {default_profile_version}"
# Now 'break' this profile -- use nix profile on it so nix-env will no longer work on it.
machine.succeed(
"nix profile install --profile /nix/var/nix/profiles/default '${pkgs.hello.drvPath}^*' >&2"
)
# Confirm that nix-env is broken.
machine.fail(
"nix-env --query --installed --profile /nix/var/nix/profiles/default >&2"
)
# And use nix upgrade-nix one more time, on the `nix profile` style profile.
# (Specifying Lix by full path so we can use --store-path.)
machine.succeed(
"${lib.getBin lix}/bin/nix upgrade-nix --store-path '${lix}' >&2"
)
default_profile_version = machine.succeed("nix --version")
print(default_profile_version)
assert "${lixVersion}" in default_profile_version, f"${lixVersion} not in {default_profile_version}"
'';
}