add test for previous commit

testcases/t/508-move-workspace-focus.t

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+#!perl
+# vim:ts=4:sw=4:expandtab
+#
+# Please read the following documents before working on tests:
+# • http://build.i3wm.org/docs/testsuite.html
+#   (or docs/testsuite)
+#
+# • http://build.i3wm.org/docs/lib-i3test.html
+#   (alternatively: perldoc ./testcases/lib/i3test.pm)
+#
+# • http://build.i3wm.org/docs/ipc.html
+#   (or docs/ipc)
+#
+# • http://onyxneon.com/books/modern_perl/modern_perl_a4.pdf
+#   (unless you are already familiar with Perl)
+#
+# Regression test: Verify that focus is correct after moving a floating window
+# to a workspace on a different visible output.
+# Bug still in: 4.3-83-ge89a25f
+use i3test i3_autostart => 0;
+
+# Ensure the pointer is at (0, 0) so that we really start on the first
+# (the left) workspace.
+$x->root->warp_pointer(0, 0);
+
+my $config = <<EOT;
+# i3 config file (v4)
+font -misc-fixed-medium-r-normal--13-120-75-75-C-70-iso10646-1
+
+fake-outputs 1024x768+0+0,1024x768+1024+0
+EOT
+my $pid = launch_with_config($config);
+
+my $left_ws = fresh_workspace(output => 0);
+open_window;
+
+my $right_ws = fresh_workspace(output => 1);
+open_window;
+my $right_float = open_floating_window;
+
+cmd "move workspace $left_ws";
+is($x->input_focus, $right_float->id, 'floating window still focused');
+
+exit_gracefully($pid);
+
+done_testing;