931b7b47a2
This fixes some quirks I introduced in previous commits. 1. No need for an extra newline when printing the output of shell commands. 2. 'or die' is what's already used in the NixOS test sources, while 'die unless' has no occurrences.
45 lines
1.3 KiB
XML
45 lines
1.3 KiB
XML
<section xmlns="http://docbook.org/ns/docbook"
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xmlns:xlink="http://www.w3.org/1999/xlink"
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xmlns:xi="http://www.w3.org/2001/XInclude"
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version="5.0"
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xml:id="sec-running-nixos-tests">
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<title>Running Tests interactively</title>
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<para>
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The test itself can be run interactively. This is particularly useful when
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developing or debugging a test:
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<screen>
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$ nix-build nixos/tests/login.nix -A driver
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$ ./result/bin/nixos-test-driver
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starting VDE switch for network 1
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>
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</screen>
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You can then take any Perl statement, e.g.
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<screen>
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> startAll
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> testScript
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> $machine->succeed("touch /tmp/foo")
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> print($machine->succeed("pwd")) # Show stdout of command
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</screen>
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The function <command>testScript</command> executes the entire test script
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and drops you back into the test driver command line upon its completion.
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This allows you to inspect the state of the VMs after the test (e.g. to debug
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the test script).
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</para>
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<para>
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To just start and experiment with the VMs, run:
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<screen>
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$ nix-build nixos/tests/login.nix -A driver
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$ ./result/bin/nixos-run-vms
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</screen>
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The script <command>nixos-run-vms</command> starts the virtual machines
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defined by test.
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</para>
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<para>
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The machine state is kept across VM restarts in
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<filename>/tmp/vm-state-</filename><varname>machinename</varname>.
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</para>
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</section>
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