add a regression test for the floating move thing

testcases/t/47-regress-floatingmove.t

@@ -0,0 +1,39 @@
+#!perl
+# vim:ts=4:sw=4:expandtab
+#
+# Regression test for moving a con outside of a floating con when there are no
+# tiling cons on a workspace
+#
+use X11::XCB qw(:all);
+use Time::HiRes qw(sleep);
+use i3test tests => 2;
+
+BEGIN {
+    use_ok('X11::XCB::Window');
+}
+
+my $x = X11::XCB::Connection->new;
+
+my $tmp = get_unused_workspace;
+cmd "workspace $tmp";
+
+my $left = open_standard_window($x);
+sleep 0.25;
+my $mid = open_standard_window($x);
+sleep 0.25;
+
+# go to workspace level
+cmd 'level up';
+sleep 0.25;
+
+# make it floating
+cmd 'mode toggle';
+sleep 0.25;
+
+# move the con outside the floating con
+cmd 'move before v';
+sleep 0.25;
+
+my $tree = i3('/tmp/nestedcons')->get_tree->recv;
+my @nodes = @{$tree->{nodes}};
+ok(@nodes > 0, 'i3 still lives');