adding nix-env -i check in booted system.

It fails because nixbldN don't belong to the nixbld group
Manually removing socket file. Somehow the socket is not always created
when rebooting the second time (?) I have to look into that later.

svn path=/nixos/trunk/; revision=18984

tests/test-nixos-install-from-cd/test.nix

@@ -67,7 +67,6 @@ rec {
 
     # TODO add nix-env -i command and verify that root can install additional
     # tools such as git or sshfs-fuse!
-    # run this test when booting both: the iso and the installed system
     pkgs.runCommand "nixos-installation-test" { inherit systemDerivation; } ''
 
     INFO(){ echo "INFO: " $@; }
@@ -96,7 +95,10 @@ rec {
     # creating shell script for debugging purposes
     cat >> run-kvm.sh << EOF
     #!/bin/sh -e
-    # maybe swap should be used ?
+
+    # don't ask me why I have to remove the socket.. If I don't it won't be
+    # reused by kvm_qemu!
+    rm $SOCKET_NAME || true
     exec qemu-system-x86_64 -m 512 \
         -no-kvm-irqchip \
         -net nic,model=virtio -net user -smb /nix \
@@ -206,6 +208,26 @@ rec {
     INFO "booting installed system"
     RUN_KVM -boot c
     waitForSSHD
+
+
+    INFO "verifying that nix-env -i works"
+
+    SSH_STDIN_E << EOF
+
+      cat >> test.nix << EOF_TEST
+      let pkgs = import /etc/nixos/nixpkgs/pkgs/top-level/all-packages.nix {};
+      in pkgs.stdenv.mkDerivation {
+        name = "test";
+        phases = "create_out";
+        create_out = "mkdir -p $out/ok";
+      }
+    EOF_TEST
+
+      set -x
+      nix-env -i -f test.nix
+      [ -e ~/.nix-profile/ok ]
+    EOF
+
     SHUTDOWN_VM
 
     echo "$(date) success" > $out