tests: rename files (00x-*.t is basic stuff, >=100-*.t are tests using IPC)

testcases/t/145-flattening.t

@@ -0,0 +1,31 @@
+#!perl
+# vim:ts=4:sw=4:expandtab
+#
+# by moving the window in the opposite orientation that its parent has, we
+# force i3 to create a new split container with the appropriate orientation.
+# However, when doing that two times in a row, we end up with two split
+# containers which are then redundant (workspace is horizontal, then v-split,
+# then h-split – we could just append the children of the latest h-split to the
+# workspace itself).
+#
+# This testcase checks that the tree is properly flattened after moving.
+#
+use X11::XCB qw(:all);
+use i3test;
+
+my $x = X11::XCB::Connection->new;
+
+my $tmp = fresh_workspace;
+
+my $left = open_window($x);
+my $mid = open_window($x);
+my $right = open_window($x);
+
+cmd 'move before v';
+cmd 'move after h';
+my $ws = get_ws($tmp);
+
+is($ws->{orientation}, 'horizontal', 'workspace orientation is horizontal');
+is(@{$ws->{nodes}}, 3, 'all three windows on workspace level');
+
+done_testing;