PHP code example of jonpurvis / fuzz

1. Go to this page and download the library: Download jonpurvis/fuzz library. Choose the download type require.

2. Extract the ZIP file and open the index.php.

3. Add this code to the index.php.

    
        
<?php
require_once('vendor/autoload.php');

/* Start to develop here. Best regards https://php-download.com/ */

jonpurvis / fuzz example snippets


namespace App\Webhooks;

final class PayloadParser
{
    public static function eventName(string $json): string
    {
        $data = json_decode($json, true);

        // Assumes an object with a string "event" — fine for happy paths…
        return $data['event'];
    }
}


it('parses known webhook payloads', function (string $json, string $expected): void {
    expect(PayloadParser::eventName($json))->toBe($expected);
})->with([
    'checkout' => ['{"event":"checkout.session.completed"}', 'checkout.session.completed'],
    'invoice' => ['{"event":"invoice.paid"}', 'invoice.paid'],
]);

it('rejects known bad webhook payloads', function (string $json): void {
    expect(fn () => PayloadParser::eventName($json))->toThrow(TypeError::class);
})->with([
    'empty object' => ['{}'],
    'null json' => ['null'],
]);


use function Fuzz\fuzz;

test('webhook parser never fatals on hostile JSON', function (): void {
    fuzz(Closure::fromCallable([PayloadParser::class, 'eventName']))
        ->seed([
            '{"event":"checkout.session.completed"}',
            '{"event":"invoice.paid","id":"in_123"}',
        ])
        ->withDictionary(['{', '}', '[', ']', 'null', 'event', ':', ','])
        ->runs(2000)
        ->maxLen(64)
        ->saveCrashes()
        ->run();
});