1 files changed, 473 insertions, 0 deletions
diff --git a/t/001-deb-systemd-helper.t b/t/001-deb-systemd-helper.t
new file mode 100644
index 0000000..c78ad53
--- /dev/null
+++ b/t/001-deb-systemd-helper.t
@@ -0,0 +1,473 @@
+#!perl
+# vim:ts=4:sw=4:et
+
+use strict;
+use warnings;
+use Test::More;
+use File::Temp qw(tempfile tempdir); # in core since perl 5.6.1
+use File::Path qw(make_path); # in core since Perl 5.001
+use File::Basename; # in core since Perl 5
+use FindBin; # in core since Perl 5.00307
+
+use lib "$FindBin::Bin/.";
+use helpers;
+
+test_setup();
+
+my $dpkg_root = $ENV{DPKG_ROOT} // '';
+
+# ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
+# ┃ Verify “is-enabled” is not true for a random, non-existing unit file.     ┃
+# ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
+
+my ($fh, $random_unit) = tempfile('unit\x2dXXXXX',
+    SUFFIX => '.service',
+    TMPDIR => 1,
+    UNLINK => 1);
+close($fh);
+$random_unit = basename($random_unit);
+
+isnt_enabled($random_unit);
+isnt_debian_installed($random_unit);
+
+# ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
+# ┃ Verify “is-enabled” is not true for a random, existing unit file.         ┃
+# ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
+
+my $servicefile_path = "$dpkg_root/lib/systemd/system/$random_unit";
+make_path("$dpkg_root/lib/systemd/system");
+open($fh, '>', $servicefile_path);
+print $fh <<'EOT';
+[Unit]
+Description=test unit
+
+[Service]
+ExecStart=/bin/sleep 1
+
+[Install]
+WantedBy=multi-user.target
+EOT
+close($fh);
+
+isnt_enabled($random_unit);
+isnt_debian_installed($random_unit);
+
+# ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
+# ┃ Verify “enable” creates the requested symlinks.                           ┃
+# ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
+
+unless ($ENV{'TEST_ON_REAL_SYSTEM'}) {
+    # This might exist if we don't start from a fresh directory
+    ok(! -d "$dpkg_root/etc/systemd/system/multi-user.target.wants",
+       'multi-user.target.wants does not exist yet');
+}
+
+my $retval = dsh('enable', $random_unit);
+is($retval, 0, "enable command succeeded");
+my $symlink_path = "$dpkg_root/etc/systemd/system/multi-user.target.wants/$random_unit";
+ok(-l $symlink_path, "$random_unit was enabled");
+is($dpkg_root . readlink($symlink_path), $servicefile_path,
+    "symlink points to $servicefile_path");
+
+# ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
+# ┃ Verify “is-enabled” now returns true.                                     ┃
+# ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
+
+is_enabled($random_unit);
+is_debian_installed($random_unit);
+
+# ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
+# ┃ Verify deleting the symlinks and running “enable” again does not          ┃
+# ┃ re-create the symlinks.                                                   ┃
+# ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
+
+unlink($symlink_path);
+ok(! -l $symlink_path, 'symlink deleted');
+isnt_enabled($random_unit);
+is_debian_installed($random_unit);
+
+$retval = dsh('enable', $random_unit);
+is($retval, 0, "enable command succeeded");
+
+isnt_enabled($random_unit);
+
+# ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
+# ┃ Verify “disable” when purging deletes the statefile.                      ┃
+# ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
+
+my $statefile = "$dpkg_root/var/lib/systemd/deb-systemd-helper-enabled/$random_unit.dsh-also";
+
+ok(-f $statefile, 'state file exists');
+
+$ENV{'_DEB_SYSTEMD_HELPER_PURGE'} = '1';
+$retval = dsh('disable', $random_unit);
+delete $ENV{'_DEB_SYSTEMD_HELPER_PURGE'};
+is($retval, 0, "disable command succeeded");
+ok(! -f $statefile, 'state file does not exist anymore after purging');
+isnt_debian_installed($random_unit);
+
+# ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
+# ┃ Verify “enable” after purging does re-create the symlinks.                ┃
+# ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
+
+ok(! -l $symlink_path, 'symlink does not exist yet');
+isnt_enabled($random_unit);
+
+$retval = dsh('enable', $random_unit);
+is($retval, 0, "enable command succeeded");
+
+is_enabled($random_unit);
+is_debian_installed($random_unit);
+
+# ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
+# ┃ Verify “disable” removes the symlinks.                                    ┃
+# ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
+
+$ENV{'_DEB_SYSTEMD_HELPER_PURGE'} = '1';
+$retval = dsh('disable', $random_unit);
+delete $ENV{'_DEB_SYSTEMD_HELPER_PURGE'};
+is($retval, 0, "disable command succeeded");
+
+isnt_enabled($random_unit);
+
+# ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
+# ┃ Verify “enable” after purging does re-create the symlinks.                ┃
+# ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
+
+ok(! -l $symlink_path, 'symlink does not exist yet');
+isnt_enabled($random_unit);
+
+$retval = dsh('enable', $random_unit);
+is($retval, 0, "enable command succeeded");
+
+is_enabled($random_unit);
+is_debian_installed($random_unit);
+
+# ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
+# ┃ Verify the “purge” verb works.                                            ┃
+# ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
+
+$retval = dsh('purge', $random_unit);
+is($retval, 0, "purge command succeeded");
+
+isnt_enabled($random_unit);
+isnt_debian_installed($random_unit);
+
+# ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
+# ┃ Verify “enable” after purging does re-create the symlinks.                ┃
+# ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
+
+ok(! -l $symlink_path, 'symlink does not exist yet');
+isnt_enabled($random_unit);
+
+$retval = dsh('enable', $random_unit);
+is($retval, 0, "enable command succeeded");
+
+is_enabled($random_unit);
+is_debian_installed($random_unit);
+
+# ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
+# ┃ Verify “mask” (when enabled) results in the symlink pointing to /dev/null ┃
+# ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
+
+my $mask_path = "$dpkg_root/etc/systemd/system/$random_unit";
+ok(! -l $mask_path, 'mask link does not exist yet');
+
+$retval = dsh('mask', $random_unit);
+is($retval, 0, "mask command succeeded");
+ok(-l $mask_path, 'mask link exists');
+is(readlink($mask_path), '/dev/null', 'service masked');
+
+$retval = dsh('unmask', $random_unit);
+is($retval, 0, "unmask command succeeded");
+ok(! -e $mask_path, 'mask link does not exist anymore');
+
+# ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
+# ┃ Verify “mask” (when disabled) works the same way                          ┃
+# ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
+
+$retval = dsh('disable', $random_unit);
+is($retval, 0, "disable command succeeded");
+ok(! -e $symlink_path, 'symlink no longer exists');
+
+$retval = dsh('mask', $random_unit);
+is($retval, 0, "mask command succeeded");
+ok(-l $mask_path, 'mask link exists');
+is(readlink($mask_path), '/dev/null', 'service masked');
+
+$retval = dsh('unmask', $random_unit);
+is($retval, 0, "unmask command succeeded");
+ok(! -e $mask_path, 'symlink no longer exists');
+
+# ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
+# ┃ Verify “mask”/unmask don’t do anything when the user already masked.      ┃
+# ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
+
+ok(! -l $mask_path, 'mask link does not exist yet');
+symlink('/dev/null', $mask_path);
+ok(-l $mask_path, 'mask link exists');
+is(readlink($mask_path), '/dev/null', 'service masked');
+
+$retval = dsh('mask', $random_unit);
+is($retval, 0, "mask command succeeded");
+ok(-l $mask_path, 'mask link exists');
+is(readlink($mask_path), '/dev/null', 'service still masked');
+
+$retval = dsh('unmask', $random_unit);
+is($retval, 0, "unmask command succeeded");
+ok(-l $mask_path, 'mask link exists');
+is(readlink($mask_path), '/dev/null', 'service still masked');
+
+# ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
+# ┃ Verify “mask”/unmask don’t do anything when the user copied the .service. ┃
+# ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
+
+unlink($mask_path);
+
+open($fh, '>', $mask_path);
+print $fh <<'EOT';
+[Unit]
+Description=test unit
+
+[Service]
+ExecStart=/bin/sleep 1
+
+[Install]
+WantedBy=multi-user.target
+EOT
+close($fh);
+
+ok(-e $mask_path, 'local service file exists');
+ok(! -l $mask_path, 'local service file is not a symlink');
+
+$retval = dsh('mask', $random_unit);
+isnt($retval, -1, 'deb-systemd-helper could be executed');
+ok(!($retval & 127), 'deb-systemd-helper did not exit due to a signal');
+is($retval >> 8, 0, 'deb-systemd-helper exited with exit code 0');
+ok(-e $mask_path, 'local service file still exists');
+ok(! -l $mask_path, 'local service file is still not a symlink');
+
+$retval = dsh('unmask', $random_unit);
+isnt($retval, -1, 'deb-systemd-helper could be executed');
+ok(!($retval & 127), 'deb-systemd-helper did not exit due to a signal');
+is($retval >> 8, 0, 'deb-systemd-helper exited with exit code 0');
+ok(-e $mask_path, 'local service file still exists');
+ok(! -l $mask_path, 'local service file is still not a symlink');
+
+unlink($mask_path);
+
+# ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
+# ┃ Verify Alias= handling.                                                   ┃
+# ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
+
+$retval = dsh('purge', $random_unit);
+is($retval, 0, "purge command succeeded");
+
+open($fh, '>', $servicefile_path);
+print $fh <<'EOT';
+[Unit]
+Description=test unit
+
+[Service]
+ExecStart=/bin/sleep 1
+
+[Install]
+WantedBy=multi-user.target
+Alias=foo\x2dtest.service
+EOT
+close($fh);
+
+isnt_enabled($random_unit);
+isnt_enabled('foo\x2dtest.service');
+my $alias_path = $dpkg_root . '/etc/systemd/system/foo\x2dtest.service';
+ok(! -l $alias_path, 'alias link does not exist yet');
+$retval = dsh('enable', $random_unit);
+is($retval, 0, "enable command succeeded");
+is($dpkg_root . readlink($alias_path), $servicefile_path, 'correct alias link');
+is_enabled($random_unit);
+ok(! -l $mask_path, 'mask link does not exist yet');
+
+$retval = dsh('mask', $random_unit);
+is($retval, 0, "mask command succeeded");
+is($dpkg_root . readlink($alias_path), $servicefile_path, 'correct alias link');
+is(readlink($mask_path), '/dev/null', 'service masked');
+
+$retval = dsh('unmask', $random_unit);
+is($retval, 0, "unmask command succeeded");
+is($dpkg_root . readlink($alias_path), $servicefile_path, 'correct alias link');
+ok(! -l $mask_path, 'mask link does not exist any more');
+
+$retval = dsh('disable', $random_unit);
+isnt_enabled($random_unit);
+ok(! -l $alias_path, 'alias link does not exist any more');
+
+# ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
+# ┃ Verify Alias/mask with removed package (as in postrm)                     ┃
+# ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
+
+$retval = dsh('purge', $random_unit);
+is($retval, 0, "purge command succeeded");
+$retval = dsh('enable', $random_unit);
+is($retval, 0, "enable command succeeded");
+is($dpkg_root . readlink($alias_path), $servicefile_path, 'correct alias link');
+
+unlink($servicefile_path);
+
+$retval = dsh('mask', $random_unit);
+is($retval, 0, "mask command succeeded with uninstalled unit");
+is($dpkg_root . readlink($alias_path), $servicefile_path, 'correct alias link');
+is(readlink($mask_path), '/dev/null', 'service masked');
+
+$retval = dsh('purge', $random_unit);
+is($retval, 0, "purge command succeeded with uninstalled unit");
+ok(! -l $alias_path, 'alias link does not exist any more');
+is(readlink($mask_path), '/dev/null', 'service masked');
+
+$retval = dsh('unmask', $random_unit);
+is($retval, 0, "unmask command succeeded with uninstalled unit");
+ok(! -l $mask_path, 'mask link does not exist any more');
+
+# ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
+# ┃ Verify Alias= to the same unit name                                       ┃
+# ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
+
+open($fh, '>', $servicefile_path);
+print $fh <<"EOT";
+[Unit]
+Description=test unit
+
+[Service]
+ExecStart=/bin/sleep 1
+
+[Install]
+WantedBy=multi-user.target
+Alias=$random_unit
+EOT
+close($fh);
+
+isnt_enabled($random_unit);
+isnt_enabled('foo\x2dtest.service');
+# note that in this case $alias_path and $mask_path are identical
+$retval = dsh('enable', $random_unit);
+is($retval, 0, "enable command succeeded");
+is_enabled($random_unit);
+# systemctl enable does create the alias link even if it's not needed
+#ok(! -l $mask_path, 'mask link does not exist yet');
+
+unlink($servicefile_path);
+
+$retval = dsh('mask', $random_unit);
+is($retval, 0, "mask command succeeded");
+is(readlink($mask_path), '/dev/null', 'service masked');
+
+$retval = dsh('unmask', $random_unit);
+is($retval, 0, "unmask command succeeded");
+ok(! -l $mask_path, 'mask link does not exist any more');
+
+$retval = dsh('purge', $random_unit);
+isnt_enabled($random_unit);
+ok(! -l $mask_path, 'mask link does not exist any more');
+
+# ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
+# ┃ Verify WantedBy and Alias with template unit with DefaultInstance.        ┃
+# ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
+
+($fh, $servicefile_path) = tempfile('unit\x2dXXXXX',
+    DIR    => "$dpkg_root/lib/systemd/system",
+    SUFFIX => '@.service',
+    UNLINK => 1);
+print $fh <<'EOT';
+[Unit]
+Description=template test unit
+
+[Service]
+ExecStart=/bin/sleep 1
+
+[Install]
+Alias=foo\x2dtest@.service
+Alias=foo\x2dbar@baz.service
+WantedBy=multi-user.target
+DefaultInstance=instance\x2d
+EOT
+close($fh);
+
+$random_unit = basename($servicefile_path);
+my $random_instance = $random_unit;
+$random_instance =~ s/^(.*\@)(\.\w+)$/$1instance\\x2d$2/;
+
+isnt_enabled($random_unit);
+isnt_enabled('foo\x2dtest@.service');
+isnt_enabled('foo\x2dtest@instance\x2d.service');
+isnt_enabled('foo\x2dbar@baz.service');
+isnt_enabled('foo\x2dbar@instance\x2d.service');
+
+my $template_alias_path = $dpkg_root . '/etc/systemd/system/foo\x2dtest@.service';
+my $instance_alias_path = $dpkg_root . '/etc/systemd/system/foo\x2dbar@baz.service';
+my $template_wanted_path = "$dpkg_root/etc/systemd/system/multi-user.target.wants/$random_unit";
+my $instance_wanted_path = "$dpkg_root/etc/systemd/system/multi-user.target.wants/$random_instance";
+ok(! -l $template_alias_path, 'template alias link does not exist yet');
+ok(! -l $instance_alias_path, 'instance alias link does not exist yet');
+ok(! -l $template_wanted_path, 'template wanted link does not exist yet');
+ok(! -l $instance_wanted_path, 'instance wanted link does not exist yet');
+$retval = dsh('enable', $random_unit);
+is($retval, 0, "enable command succeeded");
+is($dpkg_root . readlink($template_alias_path), $servicefile_path, 'correct template alias link');
+is($dpkg_root . readlink($instance_alias_path), $servicefile_path, 'correct instance alias link');
+ok(! -l $template_wanted_path, 'template wanted link does still not exist');
+is($dpkg_root . readlink($instance_wanted_path), $servicefile_path, 'correct instance wanted link');
+is_enabled($random_unit);
+
+$retval = dsh('disable', $random_unit);
+isnt_enabled($random_unit);
+ok(! -l $template_alias_path, 'template alias link does not exist anymore');
+ok(! -l $instance_alias_path, 'instance alias link does not exist anymore');
+ok(! -l $template_wanted_path, 'template wanted link does still not exist');
+ok(! -l $instance_wanted_path, 'instance wanted link does not exist anymore');
+
+# ┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
+# ┃ Verify WantedBy and Alias with template unit without DefaultInstance.     ┃
+# ┗━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┛
+
+open($fh, '>', $servicefile_path);
+print $fh <<'EOT';
+[Unit]
+Description=template test unit
+
+[Service]
+ExecStart=/bin/sleep 1
+
+[Install]
+Alias=foo\x2dtest@.service
+Alias=foo\x2dbar@baz.service
+RequiredBy=foo\x2ddepender@.service
+EOT
+close($fh);
+
+isnt_enabled($random_unit);
+isnt_enabled('foo\x2dtest@.service');
+isnt_enabled('foo\x2dbar@baz.service');
+
+$template_alias_path = $dpkg_root . '/etc/systemd/system/foo\x2dtest@.service';
+$instance_alias_path = $dpkg_root . '/etc/systemd/system/foo\x2dbar@baz.service';
+$template_wanted_path = $dpkg_root . '/etc/systemd/system/foo\x2ddepender@.service.requires/' . $random_unit;
+$instance_wanted_path = $dpkg_root . '/etc/systemd/system/foo\x2ddepender@.service.requires/' . $random_instance;
+ok(! -l $template_alias_path, 'template alias link does not exist yet');
+ok(! -l $instance_alias_path, 'instance alias link does not exist yet');
+ok(! -l $template_wanted_path, 'template wanted link does not exist yet');
+ok(! -l $instance_wanted_path, 'instance wanted link does not exist yet');
+$retval = dsh('enable', $random_unit);
+is($retval, 0, "enable command succeeded");
+is($dpkg_root . readlink($template_alias_path), $servicefile_path, 'correct template alias link');
+is($dpkg_root . readlink($instance_alias_path), $servicefile_path, 'correct instance alias link');
+is($dpkg_root . readlink($template_wanted_path), $servicefile_path, 'correct template wanted link');
+ok(! -l $instance_wanted_path, 'instance wanted link does still not exist');
+is_enabled($random_unit);
+
+$retval = dsh('disable', $random_unit);
+isnt_enabled($random_unit);
+ok(! -l $template_alias_path, 'template alias link does not exist anymore');
+ok(! -l $instance_alias_path, 'instance alias link does not exist anymore');
+ok(! -l $template_wanted_path, 'template wanted link does still not exist');
+ok(! -l $instance_wanted_path, 'instance wanted link does not exist anymore');
+
+done_testing;