Reorder tests to not use the same number (#2947)

Distinct numbers make re-running individual tests easier by helping with
tab-completion.

Completeness verified using:
% for i in $(seq 0 600)
do
  files=$(ls testcases/t/$(printf "%03d" $i)-*.t 2>&- | wc -l)
  [ "$files" != "0" ] && [ "$files" != "1" ] && echo "clash: $i"
done

testcases/t/272-regress-focus-assign.t

@@ -0,0 +1,77 @@
+#!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: Checks if focus is stolen when a window is managed which is
+# assigned to an invisible workspace
+#
+use i3test i3_autostart => 0;
+
+sub open_special {
+    my %args = @_;
+    $args{name} //= 'special window';
+
+    # We use dont_map because i3 will not map the window on the current
+    # workspace. Thus, open_window would time out in wait_for_map (2 seconds).
+    my $window = open_window(
+        %args,
+        wm_class => 'special',
+        dont_map => 1,
+    );
+    $window->map;
+    return $window;
+}
+
+#####################################################################
+# start a window and see that it does not get assigned with an empty config
+#####################################################################
+
+my $config = <<EOT;
+# i3 config file (v4)
+font -misc-fixed-medium-r-normal--13-120-75-75-C-70-iso10646-1
+assign [class="special"] targetws
+EOT
+
+my $pid = launch_with_config($config);
+
+my $tmp = fresh_workspace;
+
+ok(@{get_ws_content($tmp)} == 0, 'no containers yet');
+ok(get_ws($tmp)->{focused}, 'current workspace focused');
+
+my $window = open_special;
+sync_with_i3;
+
+ok(@{get_ws_content($tmp)} == 0, 'special window not on current workspace');
+ok(@{get_ws_content('targetws')} == 1, 'special window on targetws');
+ok(get_ws($tmp)->{focused}, 'current workspace still focused');
+
+#####################################################################
+# the same test, but with a floating window
+#####################################################################
+
+$window = open_special(
+    window_type => $x->atom(name => '_NET_WM_WINDOW_TYPE_UTILITY'),
+);
+
+ok(@{get_ws_content($tmp)} == 0, 'special window not on current workspace');
+ok(@{get_ws_content('targetws')} == 1, 'special window on targetws');
+ok(get_ws($tmp)->{focused}, 'current workspace still focused');
+
+exit_gracefully($pid);
+
+$window->destroy;
+
+done_testing;