Add request_cache support

Author: babenkoivan

README.md

@@ -468,6 +468,9 @@ $searchParameters->explain(true);
 // set maximum number of documents to collect for each shard
 $searchParameters->terminateAfter(10);
 
+// enable caching
+$searchParameters->requestCache(true);
+
 // perform the search and get the result
 $searchResult = $documentManager->search($searchParameters);
 

src/Search/SearchParameters.php

@@ -158,6 +158,12 @@ public function terminateAfter(int $terminateAfter): self
         return $this;
     }
 
+    public function requestCache(bool $requestCache): self
+    {
+        $this->params['request_cache'] = $requestCache;
+        return $this;
+    }
+
     public function toArray(): array
     {
         return $this->params;

tests/Unit/Search/SearchParametersTest.php

@@ -400,4 +400,10 @@ public function test_array_casting_with_terminate_after(): void
         $searchParameters = (new SearchParameters())->terminateAfter(10);
         $this->assertSame(['terminate_after' => 10], $searchParameters->toArray());
     }
+
+    public function test_array_casting_with_request_cache(): void
+    {
+        $searchParameters = (new SearchParameters())->requestCache(true);
+        $this->assertSame(['request_cache' => true], $searchParameters->toArray());
+    }
 }