ldc-arcadia-api/tests/Feature/Api/V1/Health/HealthCheckTest.php

<?php

declare(strict_types=1);

namespace Tests\Feature\Api\V1\Health;

use Illuminate\Support\Facades\Config;
use Tests\TestCase;

describe('Health Check API (GET /api/v1/health)', function (): void {
    $originalDbDefault = null;
    $originalArcadiaDb = null;
    $originalCache     = null;
    $originalMail      = null;
    $originalMailer    = null;

    beforeEach(function () use (&$originalDbDefault, &$originalArcadiaDb, &$originalCache, &$originalMail, &$originalMailer): void {
        $originalDbDefault = Config::get('database.default');
        $originalArcadiaDb = Config::get('database.arcadia_meta_model');
        $originalCache     = Config::get('cache.default');
        $originalMail      = Config::get('mail.default');
        $originalMailer    = Config::get('mail.mailers.smtp');
    });

    afterEach(function () use (&$originalDbDefault, &$originalArcadiaDb, &$originalCache, &$originalMail, &$originalMailer): void {
        Config::set('database.default', $originalDbDefault);
        Config::set('database.arcadia_meta_model', $originalArcadiaDb);
        Config::set('cache.default', $originalCache);
        Config::set('mail.default', $originalMail);
        Config::set('mail.mailers.smtp', $originalMailer);
    });

    it('returns 200 healthy when all infrastructure components are operational', function (): void {
        // GIVEN
        /** @var TestCase $this */

        // WHEN
        $response = $this->getJson('/api/v1/health');

        // THEN
        $response->assertStatus(200)
            ->assertJsonStructure([
                'status',
                'timestamp',
                'checks' => [
                    'database_default' => ['status', 'connection'],
                    'database_arcadia' => ['status', 'connection'],
                    'cache'            => ['status', 'store'],
                    'mail_smtp'        => ['status', 'transport'],
                ],
            ])
            ->assertJson([
                'status' => 'healthy',
                'checks' => [
                    'database_default' => ['status' => 'up'],
                    'database_arcadia' => ['status' => 'up'],
                    'cache'            => ['status' => 'up'],
                    'mail_smtp'        => ['status' => 'up'],
                ],
            ]);
    });

    it('returns 503 unhealthy when default database connection fails', function () use (&$originalDbDefault): void {
        // GIVEN
        /** @var TestCase $this */
        Config::set('database.default', 'invalid_connection');

        try {
            // WHEN
            $response = $this->getJson('/api/v1/health');

            // THEN
            $response->assertStatus(503)
                ->assertJson([
                    'status' => 'unhealthy',
                    'checks' => [
                        'database_default' => ['status' => 'down'],
                    ],
                ]);
        } finally {
            Config::set('database.default', $originalDbDefault);
        }
    });

    it('returns 503 unhealthy when arcadia database connection fails', function () use (&$originalArcadiaDb): void {
        // GIVEN
        /** @var TestCase $this */
        Config::set('database.connections.invalid_arcadia_connection', [
            'driver'   => 'mysql',
            'host'     => '127.0.0.1',
            'port'     => 65433,
            'database' => 'invalid_arcadia_db',
        ]);
        Config::set('database.arcadia_meta_model', 'invalid_arcadia_connection');

        try {
            // WHEN
            $response = $this->getJson('/api/v1/health');

            // THEN
            $response->assertStatus(503)
                ->assertJson([
                    'status' => 'unhealthy',
                    'checks' => [
                        'database_arcadia' => ['status' => 'down'],
                    ],
                ]);
        } finally {
            Config::set('database.arcadia_meta_model', $originalArcadiaDb);
        }
    });

    it('returns 503 unhealthy when cache store fails', function () use (&$originalCache): void {
        // GIVEN
        /** @var TestCase $this */
        Config::set('cache.default', 'invalid_cache_store');

        try {
            // WHEN
            $response = $this->getJson('/api/v1/health');

            // THEN
            $response->assertStatus(503)
                ->assertJson([
                    'status' => 'unhealthy',
                    'checks' => [
                        'cache' => ['status' => 'down'],
                    ],
                ]);
        } finally {
            Config::set('cache.default', $originalCache);
        }
    });

    it('returns 503 unhealthy when smtp server connection fails', function () use (&$originalMail, &$originalMailer): void {
        // GIVEN
        /** @var TestCase $this */
        Config::set('mail.default', 'smtp');
        Config::set('mail.mailers.smtp', [
            'transport' => 'smtp',
            'host'      => '127.0.0.1',
            'port'      => 65432, // Non-existent port
            'timeout'   => 0.1,
        ]);

        try {
            // WHEN
            $response = $this->getJson('/api/v1/health');

            // THEN
            $response->assertStatus(503)
                ->assertJson([
                    'status' => 'unhealthy',
                    'checks' => [
                        'mail_smtp' => ['status' => 'down'],
                    ],
                ]);
        } finally {
            Config::set('mail.default', $originalMail);
            Config::set('mail.mailers.smtp', $originalMailer);
        }
    });
});