Merge pull request #6652 from abathur/doc_install_tests
This commit is contained in:
Valentin Gagarin
GitHub
commit
ac0fb38e8a
1 changed files with 70 additions and 3 deletions
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@ -86,9 +86,7 @@ by:
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$ nix develop
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```
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## Testing
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Nix comes with three different flavors of tests: unit, functional and integration.
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## Running tests
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### Unit-tests
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@ -111,3 +109,72 @@ These tests include everything that needs to interact with external services or
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Because these tests are expensive and require more than what the standard github-actions setup provides, they only run on the master branch (on <https://hydra.nixos.org/jobset/nix/master>).
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You can run them manually with `nix build .#hydraJobs.tests.{testName}` or `nix-build -A hydraJobs.tests.{testName}`
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### Installer tests
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After a one-time setup, the Nix repository's GitHub Actions continuous integration (CI) workflow can test the installer each time you push to a branch.
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Creating a Cachix cache for your installer tests and adding its authorization token to GitHub enables [two installer-specific jobs in the CI workflow](https://github.com/NixOS/nix/blob/88a45d6149c0e304f6eb2efcc2d7a4d0d569f8af/.github/workflows/ci.yml#L50-L91):
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- The `installer` job generates installers for the platforms below and uploads them to your Cachix cache:
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- `x86_64-linux`
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- `armv6l-linux`
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- `armv7l-linux`
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- `x86_64-darwin`
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- The `installer_test` job (which runs on `ubuntu-latest` and `macos-latest`) will try to install Nix with the cached installer and run a trivial Nix command.
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#### One-time setup
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1. Have a GitHub account with a fork of the [Nix repository](https://github.com/NixOS/nix).
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2. At cachix.org:
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- Create or log in to an account.
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- Create a Cachix cache using the format `<github-username>-nix-install-tests`.
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- Navigate to the new cache > Settings > Auth Tokens.
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- Generate a new Cachix auth token and copy the generated value.
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3. At github.com:
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- Navigate to your Nix fork > Settings > Secrets > Actions > New repository secret.
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- Name the secret `CACHIX_AUTH_TOKEN`.
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- Paste the copied value of the Cachix cache auth token.
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#### Using the CI-generated installer for manual testing
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After the CI run completes, you can check the output to extract the installer URL:
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1. Click into the detailed view of the CI run.
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2. Click into any `installer_test` run (the URL you're here to extract will be the same in all of them).
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3. Click into the `Run cachix/install-nix-action@v...` step and click the detail triangle next to the first log line (it will also be `Run cachix/install-nix-action@v...`)
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4. Copy the value of `install_url`
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5. To generate an install command, plug this `install_url` and your GitHub username into this template:
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```console
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sh <(curl -L <install_url>) --tarball-url-prefix https://<github-username>-nix-install-tests.cachix.org/serve
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```
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<!-- #### Manually generating test installers
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There's obviously a manual way to do this, and it's still the only way for
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platforms that lack GA runners.
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I did do this back in Fall 2020 (before the GA approach encouraged here). I'll
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sketch what I recall in case it encourages someone to fill in detail, but: I
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didn't know what I was doing at the time and had to fumble/ask around a lot--
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so I don't want to uphold any of it as "right". It may have been dumb or
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the _hard_ way from the getgo. Fundamentals may have changed since.
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Here's the build command I used to do this on and for x86_64-darwin:
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nix build --out-link /tmp/foo ".#checks.x86_64-darwin.binaryTarball"
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I used the stable out-link to make it easier to script the next steps:
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link=$(readlink /tmp/foo)
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cp $link/*-darwin.tar.xz ~/somewheres
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I've lost the last steps and am just going from memory:
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From here, I think I had to extract and modify the `install` script to point
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it at this tarball (which I scped to my own site, but it might make more sense
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to just share them locally). I extracted this script once and then just
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search/replaced in it for each new build.
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The installer now supports a `--tarball-url-prefix` flag which _may_ have
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solved this need?
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-->
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