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

testcases/t/140-focus-lost.t

@@ -0,0 +1,45 @@
+#!perl
+# vim:ts=4:sw=4:expandtab
+# Regression: Check if the focus stays the same when switching the layout
+# bug introduced by 77d0d42ed2d7ac8cafe267c92b35a81c1b9491eb
+use i3test;
+use X11::XCB qw(:all);
+
+BEGIN {
+    use_ok('X11::XCB::Window');
+}
+
+my $i3 = i3(get_socket_path());
+my $x = X11::XCB::Connection->new;
+
+sub check_order {
+    my ($msg) = @_;
+
+    my @ws = @{$i3->get_workspaces->recv};
+    my @nums = map { $_->{num} } grep { defined($_->{num}) } @ws;
+    my @sorted = sort @nums;
+
+    cmp_deeply(\@nums, \@sorted, $msg);
+}
+
+my $tmp = fresh_workspace;
+
+my $left = open_window($x);
+my $mid = open_window($x);
+my $right = open_window($x);
+
+sync_with_i3($x);
+
+diag("left = " . $left->id . ", mid = " . $mid->id . ", right = " . $right->id);
+
+is($x->input_focus, $right->id, 'Right window focused');
+
+cmd 'focus left';
+
+is($x->input_focus, $mid->id, 'Mid window focused');
+
+cmd 'layout stacked';
+
+is($x->input_focus, $mid->id, 'Mid window focused');
+
+done_testing;