From @MARTIMM

Hi,

Since I found the Test module in the rakudo project I file the bug here.

When the diag() sub is called before any tests are done the message will
not be printed when prove is run without the verbose option.

Small test file;

use v6.c;
use Test;

diag 'test message';
ok True, 'ok';

done-testing;

Test command with verbose on

prove -e perl6 -v Tests.t
Tests.t ..
# test message
ok 1 - ok
1..1
ok
All tests successful.
Files=1, Tests=1, 0 wallclock secs ( 0.02 usr 0.00 sys + 0.24 cusr
0.02 csys = 0.28 CPU)Result​: PASS

Test command with verbose off

prove -e perl6 Tests.t
Tests.t .. ok
All tests successful.
Files=1, Tests=1, 0 wallclock secs ( 0.02 usr 0.00 sys + 0.27 cusr
0.02 csys = 0.31 CPU)
Result​: PASS

Adding a test before the diag line like another "ok True, 'ok';" and
test again with verbose off

prove -e perl6 Tests.t
Tests.t .. 1/? # test message
Tests.t .. ok
All tests successful.
Files=1, Tests=2, 1 wallclock secs ( 0.02 usr 0.00 sys + 0.29 cusr
0.03 csys = 0.34 CPU)
Result​: PASS

This is Rakudo version 2016.04-7-g331e79f built on MoarVM version 2016.04
implementing Perl 6.c.

Greetings,
Marcel

From @zoffixznet

Thanks for reporting.

Fixed in rakudo/rakudo@68b66c2f71

Tests added into Rakudo's test suite in the same commit.

The RT System itself - Status changed from 'new' to 'open'

@zoffixznet - Status changed from 'open' to 'resolved'