Demo Dancer2 app for PSGI debugging

MyApp.pm

package Local::MyApp;
use Dancer2;
use Feature::Compat::Try;

our $VERSION = '0.1';

get '/say-hello' => sub {
    try {
        no strict 'refs';
        my $method = 'build_frob';
        $method->();
    }
    catch ($e) {
        status 'error';
        send_as JSON => {error => $e};
    }
    send_as JSON => {message => 'Hello world!'};
};

sub build_frob {
    return;
}

true;

test_psgi.t

#!/usr/bin/env perl

use Test::Most;
use Test::WWW::Mechanize::PSGI;
use JSON::MaybeXS;
use Local::MyApp; # name of your app's main module goes here

my $mech = Test::WWW::Mechanize::PSGI->new(
    # a Dancer2 app, so to_app returns a PSGI coderef
    app => Local::MyApp->to_app(),
);
$mech->get_ok('/say-hello');
lives_and {
    my $json = decode_json($mech->content);
    cmp_deeply( $json, {message => 'Hello world!'} );
} 'message is Hello world!';

done_testing;