add testcase for 'focus output'

testcases/t/502-focus-output.t

@@ -0,0 +1,50 @@
+#!perl
+# vim:ts=4:sw=4:expandtab
+#
+# Verifies the 'focus output' command works properly.
+
+use i3test;
+use List::Util qw(first);
+
+my $tmp = fresh_workspace;
+my $i3 = i3(get_socket_path());
+
+################################################################################
+# use 'focus output' and verify that focus gets changed appropriately
+################################################################################
+
+sub focused_output {
+    my $tree = $i3->get_tree->recv;
+    my $focused = $tree->{focus}->[0];
+    my $output = first { $_->{id} == $focused } @{$tree->{nodes}};
+    return $output->{name};
+}
+
+is(focused_output, 'xinerama-0', 'focus on first output');
+
+cmd 'focus output right';
+is(focused_output, 'xinerama-1', 'focus on second output');
+
+# focus should wrap when we focus to the right again.
+cmd 'focus output right';
+is(focused_output, 'xinerama-0', 'focus on first output again');
+
+cmd 'focus output left';
+is(focused_output, 'xinerama-1', 'focus back on second output');
+
+cmd 'focus output left';
+is(focused_output, 'xinerama-0', 'focus on first output again');
+
+cmd 'focus output up';
+is(focused_output, 'xinerama-0', 'focus still on first output');
+
+cmd 'focus output down';
+is(focused_output, 'xinerama-0', 'focus still on first output');
+
+cmd 'focus output xinerama-1';
+is(focused_output, 'xinerama-1', 'focus on second output');
+
+cmd 'focus output xinerama-0';
+is(focused_output, 'xinerama-0', 'focus on first output');
+
+done_testing;