PredisCheck

src/Check/PredisCheck.php

@@ -0,0 +1,64 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SymfonyHealthCheckBundle\Check;
+
+use Symfony\Component\DependencyInjection\ContainerInterface;
+use SymfonyHealthCheckBundle\Dto\Response;
+use Throwable;
+
+class PredisCheck implements CheckInterface
+{
+    public const PREDIS_CLIENT_CLASS = 'Predis\ClientInterface';
+
+    private const NAME = 'predis';
+
+    private ContainerInterface $container;
+
+    public function __construct(ContainerInterface $container)
+    {
+        $this->container = $container;
+    }
+
+    public function check(): Response
+    {
+        if (!$client = $this->getPredisClient()) {
+            return new Response(self::NAME, false, 'Predis Client not found');
+        }
+
+        $key = 'test-' . time() . random_int(0, 1000);
+        try {
+            if ($client->get($key) !== null) {
+                return new Response(self::NAME, false, 'Unable to check predis status');
+            }
+
+            $value = '1';
+            $client->set($key, $value);
+            if ($client->get($key) === $value) {
+                $client->del($key);
+                return new Response(self::NAME, true, 'ok');
+            } else {
+                return new Response(self::NAME, false, 'Predis is not functional');
+            }
+        } catch (Throwable $throwable) {
+            return new Response(self::NAME, false, 'Could not check predis status: ' . $throwable->getMessage());
+        }
+    }
+
+    private function getPredisClient(): ?object
+    {
+        foreach (
+            [
+                self::PREDIS_CLIENT_CLASS,
+                'SymfonyBundles\RedisBundle\Redis\ClientInterface',
+            ] as $class
+        ) {
+            if ($this->container->has($class)) {
+                return $this->container->get($class);
+            }
+        }
+
+        return null;
+    }
+}

src/Resources/config/health_checks.xml

@@ -12,5 +12,8 @@
             <argument type="service" id="service_container"/>
         </service>
         <service id="symfony_health_check.status_up_check" class="SymfonyHealthCheckBundle\Check\StatusUpCheck"/>
+        <service id="symfony_health_check.predis_check" class="SymfonyHealthCheckBundle\Check\PredisCheck">
+            <argument type="service" id="service_container"/>
+        </service>
     </services>
 </container>

tests/Integration/Controller/HealthControllerTest.php

@@ -8,6 +8,7 @@
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use SymfonyHealthCheckBundle\Check\DoctrineCheck;
 use SymfonyHealthCheckBundle\Check\EnvironmentCheck;
+use SymfonyHealthCheckBundle\Check\PredisCheck;
 use SymfonyHealthCheckBundle\Check\StatusUpCheck;
 use SymfonyHealthCheckBundle\Controller\HealthController;
 use TypeError;
@@ -77,6 +78,24 @@ public function testDoctrineCheckServiceNotFoundException(): void
         );
     }
 
+    public function testPredisCheckServiceNotFoundException(): void
+    {
+        $healthController = new HealthController();
+        $healthController->addHealthCheck(new PredisCheck(new ContainerBuilder()));
+
+        $response = $healthController->check();
+        self::assertSame(200, $response->getStatusCode());
+        self::assertSame(
+            json_encode([[
+                'name' => 'predis',
+                'result' => false,
+                'message' => 'Predis Client not found',
+                'params' => [],
+            ]]),
+            $response->getContent()
+        );
+    }
+
     public function testTwoCheckSuccess(): void
     {
         $healthController = new HealthController();

tests/Integration/Controller/PingControllerTest.php

@@ -8,6 +8,7 @@
 use Symfony\Component\DependencyInjection\ContainerBuilder;
 use SymfonyHealthCheckBundle\Check\DoctrineCheck;
 use SymfonyHealthCheckBundle\Check\EnvironmentCheck;
+use SymfonyHealthCheckBundle\Check\PredisCheck;
 use SymfonyHealthCheckBundle\Check\StatusUpCheck;
 use SymfonyHealthCheckBundle\Controller\PingController;
 use TypeError;
@@ -77,6 +78,24 @@ public function testDoctrineCheckServiceNotFoundException(): void
         );
     }
 
+    public function testPredisCheckServiceNotFoundException(): void
+    {
+        $healthController = new PingController();
+        $healthController->addHealthCheck(new PredisCheck(new ContainerBuilder()));
+
+        $response = $healthController->check();
+        self::assertSame(200, $response->getStatusCode());
+        self::assertSame(
+            json_encode([[
+                'name' => 'predis',
+                'result' => false,
+                'message' => 'Predis Client not found',
+                'params' => [],
+            ]]),
+            $response->getContent()
+        );
+    }
+
     public function testTwoCheckSuccess(): void
     {
         $pingController = new PingController();

tests/Integration/DependencyInjection/SymfonyHealthCheckExtensionTest.php

@@ -50,12 +50,18 @@ public function testWithFullConfig(): void
     {
         $container = $this->createContainerFromFixture('filled_bundle_config');
 
-        self::assertCount(6, $container->getDefinitions());
-        self::assertArrayHasKey(HealthController::class, $container->getDefinitions());
-        self::assertArrayHasKey(PingController::class, $container->getDefinitions());
-        self::assertArrayHasKey('symfony_health_check.doctrine_check', $container->getDefinitions());
-        self::assertArrayHasKey('symfony_health_check.environment_check', $container->getDefinitions());
-        self::assertArrayHasKey('symfony_health_check.status_up_check', $container->getDefinitions());
+        self::assertSame(
+            [
+                'service_container',
+                HealthController::class,
+                PingController::class,
+                'symfony_health_check.doctrine_check',
+                'symfony_health_check.environment_check',
+                'symfony_health_check.status_up_check',
+                'symfony_health_check.predis_check',
+            ],
+            array_keys($container->getDefinitions()),
+        );
     }
 
     private function createContainerFromFixture(string $fixtureFile): ContainerBuilder

tests/Unit/Check/PredisCheckTest.php

@@ -0,0 +1,98 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SymfonyHealthCheckBundle\Tests\Unit\Check;
+
+use Exception;
+use PHPUnit\Framework\TestCase;
+use Symfony\Component\DependencyInjection\Container;
+use SymfonyHealthCheckBundle\Check\PredisCheck;
+use SymfonyHealthCheckBundle\Dto\Response;
+
+class PredisCheckTest extends TestCase
+{
+    /**
+     * @return array{
+     *     predisClient:     ?object,
+     *     expectedResponse: Response,
+     * }[]
+     */
+    public static function dataProvider(): array
+    {
+        return [
+            'no client' => [
+                'predisClient' => null,
+                'expectedResponse' => new Response('predis', false, 'Predis Client not found'),
+            ],
+            'incorrectly initialized client' => [
+                'predisClient' => new class {
+                    public function get(): string
+                    {
+                        return 'abracadabra';
+                    }
+                },
+                'expectedResponse' => new Response('predis', false, 'Unable to check predis status'),
+            ],
+            'exception' => [
+                'predisClient' => new class {
+                    public function __call(string $name, array $args): string
+                    {
+                        throw new Exception('test');
+                    }
+                },
+                'expectedResponse' => new Response('predis', false, 'Could not check predis status: test'),
+            ],
+            'non-working client' => [
+                'predisClient' => new class {
+                    public function set(): void
+                    {
+                    }
+
+                    public function get(): ?string
+                    {
+                        return null;
+                    }
+                },
+                'expectedResponse' => new Response('predis', false, 'Predis is not functional'),
+            ],
+            'success' => [
+                'predisClient' => new class {
+                    private array $data = [];
+
+                    public function set(string $key, string $value): void
+                    {
+                        $this->data[$key] = $value;
+                    }
+
+                    public function get(string $key): ?string
+                    {
+                        return $this->data[$key] ?? null;
+                    }
+
+                    public function del(string $key): void
+                    {
+                        unset($this->data[$key]);
+                    }
+                },
+                'expectedResponse' => new Response('predis', true, 'ok'),
+            ],
+        ];
+    }
+
+    /**
+     * @dataProvider dataProvider
+     */
+    public function test(?object $predisClient, Response $expectedResponse): void
+    {
+        $container = new Container();
+        if ($predisClient) {
+            $container->set(PredisCheck::PREDIS_CLIENT_CLASS, $predisClient);
+        }
+
+        self::assertEquals(
+            $expectedResponse,
+            (new PredisCheck($container))->check(),
+        );
+    }
+}