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32 lines
854 B
Markdown
32 lines
854 B
Markdown
# Running Tests {#sec-running-nixos-tests}
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You can run tests using `nix-build`. For example, to run the test
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[`login.nix`](https://github.com/NixOS/nixpkgs/blob/master/nixos/tests/login.nix),
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you just do:
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```ShellSession
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$ nix-build '<nixpkgs/nixos/tests/login.nix>'
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```
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or, if you don't want to rely on `NIX_PATH`:
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```ShellSession
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$ cd /my/nixpkgs/nixos/tests
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$ nix-build login.nix
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…
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running the VM test script
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machine: QEMU running (pid 8841)
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…
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6 out of 6 tests succeeded
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```
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After building/downloading all required dependencies, this will perform
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a build that starts a QEMU/KVM virtual machine containing a NixOS
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system. The virtual machine mounts the Nix store of the host; this makes
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VM creation very fast, as no disk image needs to be created. Afterwards,
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you can view a log of the test:
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```ShellSession
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$ nix-store --read-log result
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```
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