Laravel test trait: assert JSON exact

AssertJson.php

<?php

namespace Tests\Traits;

use Illuminate\Testing\TestResponse;
use Illuminate\Support\Arr;
use PHPUnit\Framework\Assert as PHPUnit;

trait AssertJson
{
    /* @before */
    public function setUp(): void
    {
        parent::setUp();
        $this->setUpAssertJson();
    }

    public function setUpAssertJson(): void
    {
        TestResponse::macro('assertJsonStructureExact', function (array $structure = null, $responseData = null) {
            $transformStructure = function ($structure, $prefix = '') use (&$transformStructure) {
                $result = [];
                foreach ($structure as $key => $value) {
                    if (is_array($value) && array_keys($value) !== range(0, count($value) - 1)) {
                        $result = array_merge($result, $transformStructure($value, $prefix . $key . '.'));
                    } elseif (is_array($value)) {
                        foreach ($value as $k) {
                            $result[] = $prefix . $key . '.' . $k;
                        }
                    } else {
                        $result[] = $prefix . $value;
                    }
                }
                return $result;
            };

            $expectedKeys = $transformStructure($structure);
            sort($expectedKeys);

            if ($responseData === null) {
                $responseData = json_decode($this->getContent(), true);
            }

            $responseKeys = Arr::dot($responseData);
            $responseKeys = array_keys($responseKeys);
            sort($responseKeys);

            $missingKeys = array_diff($expectedKeys, $responseKeys);
            $extraKeys = array_diff($responseKeys, $expectedKeys);

            $errorMessage = "";

            if (!empty($extraKeys)) {
                $prettyList = "[\n    '" . implode("',\n    '", $extraKeys) . "'\n]";
                $errorMessage .= "The response had the following unexpected parameters:\n" . $prettyList . ".";
            }

            if (!empty($missingKeys)) {
                $prettyList = "[\n    '" . implode("',\n    '", $missingKeys) . "'\n]";
                $errorMessage .= "The response is missing the following parameters:\n" . $prettyList . ".";
            }
            PHPUnit::assertTrue(empty($missingKeys) && empty($extraKeys), $errorMessage);
            return $this;
        });
    }
}

I have finally taken the time to update this Trait so it works with the lastest version of Laravel (10)

At the same time, I have implemented more meaningful error messages that will be visible in the console.

   FAILED  Tests\Feature\AuthenticationTest > a guest can register                          
  The response had the following unexpected parameters:
[
    'data.token',
    'data.user.created_at',
    'data.user.email_verification_token',
    'data.user.updated_at'
],
The response is missing the following parameters:
[
    'status'
].