Added testcase for the no_focus directive (#1416)

testcases/t/242-no-focus.t

@@ -0,0 +1,66 @@
+#!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)
+#
+# Test the 'no_focus' directive.
+# Ticket: #1416
+use i3test i3_autostart => 0;
+
+#####################################################################
+# 1: open a window and check that it takes focus
+#####################################################################
+
+my $config = <<EOT;
+# i3 config file (v4)
+font -misc-fixed-medium-r-normal--13-120-75-75-C-70-iso10646-1
+EOT
+
+my $pid = launch_with_config($config);
+ 
+my $ws = fresh_workspace;
+my $first = open_window;
+my $focused = get_focused($ws);
+my $second = open_window;
+
+isnt(get_focused($ws), $focused, 'focus has changed');
+
+exit_gracefully($pid);
+
+#####################################################################
+# 2: open a window matched by a no_focus directive and check that
+#    it doesn't take focus
+#####################################################################
+
+my $config = <<EOT;
+# i3 config file (v4)
+font -misc-fixed-medium-r-normal--13-120-75-75-C-70-iso10646-1
+
+no_focus [instance=notme]
+EOT
+
+my $pid = launch_with_config($config);
+ 
+my $ws = fresh_workspace;
+my $first = open_window;
+my $focused = get_focused($ws);
+my $second = open_window(wm_class => 'notme');
+
+is(get_focused($ws), $focused, 'focus has not changed');
+
+exit_gracefully($pid);
+
+#####################################################################
+
+done_testing;