fix: scope Index::refresh() to the target index (#2313)

CHANGELOG.md

@@ -16,6 +16,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Deprecated
 ### Removed
 ### Fixed
+* `Elastica\Index::refresh()` now refreshes only the targeted index instead of the entire cluster (previously it issued `POST /_refresh`, now it issues `POST /{index}/_refresh`) [#2313](https://github.com/ruflin/Elastica/issues/2313)
 ### Security
 
 

src/Index.php

@@ -470,7 +470,7 @@ public function forcemerge($args = []): Response
     public function refresh(): Response
     {
         return $this->_client->toElasticaResponse(
-            $this->_client->indices()->refresh()
+            $this->_client->indices()->refresh(['index' => $this->getName()])
         );
     }
 

tests/IndexTest.php

@@ -18,6 +18,7 @@
 use Elastica\Status;
 use Elastica\Test\Base as BaseTest;
 use PHPUnit\Framework\Attributes\Group;
+use Psr\Http\Message\RequestInterface;
 
 /**
  * @internal
@@ -1028,4 +1029,23 @@ public function testAddDocumentWithStaleIfSeqNoFailsWithVersionConflict(): void
         $this->expectException(ClientResponseException::class);
         $index->addDocument($second);
     }
+
+    #[Group('functional')]
+    public function testRefreshTargetsIndexAndNotCluster(): void
+    {
+        $index = $this->_createIndex();
+        $client = $index->getClient();
+
+        $response = $index->refresh();
+
+        $this->assertTrue($response->isOk());
+
+        $lastRequest = $client->getLastRequest();
+        $this->assertInstanceOf(RequestInterface::class, $lastRequest);
+        $this->assertSame(
+            \sprintf('/%s/_refresh', $index->getName()),
+            $lastRequest->getUri()->getPath(),
+            'Index::refresh() must target the specific index, not the whole cluster'
+        );
+    }
 }