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nixos/tests: fix docker test

The docker service is socket activated by default; thus,
`waitForUnit("docker.service")` before any docker command causes the
unit test to time out.

Instead, do `waitForUnit("sockets.target")` to ensure that sockets are
setup before running docker commands.

Joachim Fasting ece457c6 7e48d80b

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unified split
Changed files
+1 -1
nixos
tests
docker.nix
+1 -1
nixos/tests/docker.nix 
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  testScript = ''


     

       
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    startAll;


     

       
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-

       
    $docker->waitForUnit("docker.service");


     

       

       
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+

       
    $docker->waitForUnit("sockets.target");


     

       
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    $docker->succeed("tar cv --files-from /dev/null | docker import - scratchimg");


     

       
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    $docker->succeed("docker run -d --name=sleeping -v /nix/store:/nix/store -v /run/current-system/sw/bin:/bin scratchimg /bin/sleep 10");


     

       
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    $docker->succeed("docker ps | grep sleeping");