+#!perl -T
+
+use strict;
+use warnings;
+
+use Test::More;
+
+use Test::Leaner ();
+
+use lib 't/lib';
+use Test::Leaner::TestHelper;
+
+my $buf;
+capture_to_buffer $buf
+ or plan skip_all =>'perl 5.8 required to test ok() failing';
+
+plan tests => 3 * 5;
+
+reset_buffer {
+ local $@;
+ my $ret = eval { Test::Leaner::ok(0) };
+ is $@, '', 'ok(0) does not croak';
+ ok !$ret, 'ok(0) returns false';
+ is $buf, "not ok 1\n", 'ok(0) produces the correct TAP code';
+};
+
+reset_buffer {
+ local $@;
+ my $ret = eval { Test::Leaner::ok(undef) };
+ is $@, '', 'ok(undef) does not croak';
+ ok !$ret, 'ok(undef) returns false';
+ is $buf, "not ok 2\n", 'ok(undef) produces the correct TAP code';
+};
+
+reset_buffer {
+ local $@;
+ my $ret = eval { Test::Leaner::ok(!1) };
+ is $@, '', 'ok(false) does not croak';
+ ok !$ret, 'ok(false) returns false';
+ is $buf, "not ok 3\n", 'ok(false) produces the correct TAP code';
+};
+
+reset_buffer {
+ local $@;
+ my $ret = eval { Test::Leaner::ok(0, 'this is a comment') };
+ is $@, '', 'ok(0, "comment") does not croak';
+ ok !$ret, 'ok(0, "comment") returns false';
+ is $buf, "not ok 4 - this is a comment\n",
+ 'ok(0, "comment") produces the correct TAP code';
+};
+
+{
+ package Test::Leaner::TestOverload::AlwaysFalse;
+
+ use overload 'bool' => sub { !1 };
+
+ sub new { bless { }, shift }
+}
+
+my $z = Test::Leaner::TestOverload::AlwaysFalse->new;
+
+reset_buffer {
+ local $@;
+ my $ret = eval { Test::Leaner::ok($z) };
+ is $@, '', 'ok($overloaded_false) does not croak';
+ ok !$ret, 'ok($overloaded_false) returns false';
+ is $buf, "not ok 5\n", 'ok($overloaded_false) produces the correct TAP code';
+};
+