I am writing some tests of a module that fetches a webpage using HTTP::Tiny->get

To test it, I am trying to use Test::Mock::HTTP::Tiny but I've never tried to use a Test::Mock module before. It's been on my radar since kcott mentioned their existence many moons ago. Now I have the need for one...but the documentation is lacking (to put it mildly!)

First I've run this code to get the mock data:

use strict;
use warnings;

use HTTP::Tiny;
use Test::Mock::HTTP::Tiny;
 
my $http = HTTP::Tiny->new;
my $resp = $http->get('http://www.way-finder.uk/');

open my $fh, '>', 'mock_html.dat';
print $fh Test::Mock::HTTP::Tiny->captured_data_dump;
close $fh;
[download]

Then I've renamed all the references to the domain www.way-finder.uk (a real domain) to www.testing.crawl (a mock domain). I've done this because I don't want the tests going out to a live site as it will change over time invalidating the tests.

My test file looks like this:

use strict;
use warnings;
use Test::More;
use Test::Mock::HTTP::Tiny;

use WWW::Crawl;

plan tests => 1;

$/ = undef;
open my $fh, '<', 't/mock_html.dat' or die "Can't open datafile";
my $replay = <$fh>;
close $fh;

die "Nothing to replay" unless $replay;

Test::Mock::HTTP::Tiny->set_mocked_data($replay);

my $crawl = WWW::Crawl->new(
    'timestamp' => 'a',
);

my @links = $crawl->crawl('https://www.testing.crawl', \&link);

cmp_ok ( scalar @links, '==', 8, 'Correct link count');

sub link {
    diag ($_[0]);
}
[download]

The method $crawl->crawl uses HTTP::Tiny->get to get the web address.

My expectation was that Test::Mock::HTTP::Tiny would replay the website to HTTP::Tiny but instead it gives the HTTP error 599 - Internal Exception

Is this the right way to use Test::Mock objects or am I completely off track here?

EDIT:
Corrected typo in title

ANOTHER EDIT:
Corrected module in title!

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