You could override the core exit function with a thin wrapper that executes a callback with the logic you want to test. Something like this: 
use strict;
use warnings;
use Test::More (tests => 1);

my $exit_callback = sub {};

BEGIN {
*CORE::GLOBAL::exit = sub { $exit_callback->(@_) };
}

my $exit_called = 0;
$exit_callback = sub { $exit_called = 1};
exit;
is($exit_called, 1, "exit was called");

[download]
Or you could play with it a bit more and do something like this: 
use strict;
use warnings;
use Test::More (tests => 2);

my $exit_callback = sub {};
BEGIN {
*CORE::GLOBAL::exit = sub { $exit_callback->(@_) };
}



sub exit_ok(&$) {
    my ($code, $message) = @_;
    my $exit_called = 0;

    $exit_callback = sub { $exit_called = 1};
    $code->();
    is($exit_called, 1, $message);
}

sub noexit_ok(&$) {
    my ($code, $message) = @_;
    my $exit_called = 0;

    $exit_callback = sub { $exit_called = 1};
    $code->();
    is($exit_called, 0, $message);
}



exit_ok {
    exit
} "exit called";

noexit_ok {
} "exit not called";

[download]

In reply to Re: How to test exit? - override CORE::GLOBAL::exit by imp
in thread How to test exit? by andreas1234567

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