Add testcases :-)

testcases/t/01-tile.t

@@ -0,0 +1,33 @@
+#!perl
+
+use Test::More tests => 4;
+use Test::Deep;
+use X11::XCB qw(:all);
+use Data::Dumper;
+
+BEGIN {
+	use_ok('X11::XCB::Window');
+}
+
+X11::XCB::Connection->connect(':0');
+
+my $original_rect = X11::XCB::Rect->new(x => 0, y => 0, width => 30, height => 30);
+
+my $window = X11::XCB::Window->new(
+                class => WINDOW_CLASS_INPUT_OUTPUT,
+		rect => $original_rect,
+		#override_redirect => 1,
+		background_color => 12632256
+);
+
+isa_ok($window, 'X11::XCB::Window');
+
+is_deeply($window->rect, $original_rect, "rect unmodified before mapping");
+
+$window->create;
+$window->map;
+
+my $new_rect = $window->rect;
+ok(!eq_deeply($new_rect, $original_rect), "Window got repositioned");
+
+diag( "Testing i3, Perl $], $^X" );