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tests: add inject_randr15 (#2573)

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This tool is similar to xtrace in usage in that it intercepts traffic to
the X server. The motivating feature for writing the tool is its ability
to inject prepared reply messages instead of the server’s reply. In
this particular case, we’ll inject a RRGetMonitors reply to test i3’s
RandR 1.5 code paths.

The added testcase is a noop for now, but with the code that’s lingering
in the randr15 branch, i3 does actually detect monitors as per the
injected reply:

    2016-11-20 21:10:05 - randr.c:__randr_query_outputs:618 -
      RandR 1.5 available, querying monitors
    2016-11-20 21:10:05 - randr.c:__randr_query_outputs:628 -
      1 RandR monitors found (timestamp 0)
    2016-11-20 21:10:05 - randr.c:__randr_query_outputs:646 -
      name DP3, x 0, y 0, width 3840 px, height 2160 px, width 520 mm,
      height 290 mm, primary 1, automatic 1

This is preparation work for issue #1799
This commit is contained in:
Michael Stapelberg
2016-11-20 23:20:14 -08:00
committed by GitHub
parent aa20c416c3
commit 3e7a07e48d
5 changed files with 543 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

73
testcases/t/533-randr15.t Normal file
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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)
#
# TODO: Description of this file.
# Ticket: #999
# Bug still in: 4.13-12-g2ff3d9d
use File::Temp qw(tempfile);
use i3test i3_autostart => 0;
my $config = <<EOT;
# i3 config file (v4)
font -misc-fixed-medium-r-normal--13-120-75-75-C-70-iso10646-1
EOT
my ($outfh, $outname) = tempfile('i3-randr15reply-XXXXXX', UNLINK => 1);
# Prepare a RRGetMonitors reply, see A.2.4 in
# https://cgit.freedesktop.org/xorg/proto/randrproto/tree/randrproto.txt
my $reply = pack('cxSLLLLx[LLL]',
1, # reply
0, # sequence (will be filled in by inject_randr15)
# 56 = length($reply) + length($monitor1)
# 32 = minimum X11 reply length
(56-32) / 4, # length in words
0, # timestamp TODO
1, # nmonitors
0); # noutputs
# Manually intern _NET_CURRENT_DESKTOP as $x->atom will not create atoms if
# they are not yet interned.
my $atom_cookie = $x->intern_atom(0, length("DP3"), "DP3");
my $DP3 = $x->intern_atom_reply($atom_cookie->{sequence})->{atom};
# MONITORINFO is defined in A.1.1 in
# https://cgit.freedesktop.org/xorg/proto/randrproto/tree/randrproto.txt
my $monitor1 = pack('LccSssSSLL',
$DP3, # name (ATOM)
1, # primary
1, # automatic
0, # ncrtcs
0, # x
0, # y
3840, # width in pixels
2160, # height in pixels
520, # width in millimeters
290); # height in millimeters
print $outfh $reply;
print $outfh $monitor1;
close($outfh);
my $pid = launch_with_config($config, inject_randr15 => $outname);
cmd 'nop';
exit_gracefully($pid);
done_testing;