Quick'n dirty. Uses the fact, that Test::More::builder() is not overridden. 

use strict;
use warnings;

use Test::More;


#-- builder() does not exist in Test::More, just intercept call hierar
+chy...

sub Test::More::builder {
  my $limit  = $Test::More::BAILOUT_LIMIT;
  my $tb     = Test::Builder::Module::builder(@_);
  my @tests  = $tb->summary;
  my $passed = grep { $_ } @tests;
  my $failed = @tests - $passed;

  if ($failed >= $limit) {
    $tb->BAIL_OUT("Limit of $limit errors reached (passed=$passed, fai
+led=$failed)!");
  }

  return $tb;
}

#-- here, we set the limit
$Test::More::BAILOUT_LIMIT = 2;  # or i.e. ... = $ENV{BAILOUT_LIMIT}

ok( 1,    "okay");
is( 1, 2, "oops");
ok( 0,    "test $_/3 will fail..." ) for (1..3);
done_testing;

[download]

Result: 

ok 1 - okay
not ok 2 - oops
#   Failed test 'oops'
#   at ./tm.pl line 29.
#          got: '1'
#     expected: '2'
not ok 3 - test 1/3 will fail...
#   Failed test 'test 1/3 will fail...'
#   at ./tm.pl line 30.
Bail out!  Limit of 2 errors reached (passed=1, failed=2)!

[download]

Can be done properly by deriving your own class, but you get the idea. You need one more test than the limit, though. The interception happens before the next test case is executed. Limit = N demands N+1 tests, but I guess that is acceptable...

Edit: This implements an individual per-test-file-limit. If you want the limit to encompass the whole test session, you'll need to maintain the counter's persistency and life-cycle across all sessions (i.e. using Storable).

In reply to Re: Bailing out from Test::More after 'some' failures by Perlbotics
in thread Bailing out from Test::More after 'some' failures by talexb

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.