Fix #20226: Revert all PR for "Data providers perform unnecessary COUNT queries that negatively affect performance"

tests/framework/rest/SerializerTest.php

@@ -10,7 +10,6 @@ namespace yiiunit\framework\rest;
 use yii\base\Model;
 use yii\data\ArrayDataProvider;
 use yii\rest\Serializer;
-use yii\web\Request;
 use yiiunit\TestCase;
 
 /**
@@ -416,56 +415,6 @@ class SerializerTest extends TestCase
         $this->assertEquals($expectedResult, $serializer->serialize($dataProvider));
     }
 
-    /**
-     * @dataProvider dataProviderSerializeDataProvider
-     *
-     * @param \yii\data\DataProviderInterface $dataProvider
-     * @param array $expectedResult
-     * @param bool $saveKeys
-     */
-    public function testHeadSerializeDataProvider($dataProvider, $expectedResult, $saveKeys = false)
-    {
-        $serializer = new Serializer();
-        $serializer->preserveKeys = $saveKeys;
-        $serializer->collectionEnvelope = 'data';
-
-        $this->assertEquals($expectedResult, $serializer->serialize($dataProvider)['data']);
-
-        $_SERVER['REQUEST_METHOD'] = 'HEAD';
-        $request = new Request();
-        $_POST[$request->methodParam] = 'HEAD';
-        $serializer = new Serializer([
-            'request' => $request
-        ]);
-        $serializer->preserveKeys = $saveKeys;
-        $this->assertEmpty($serializer->serialize($dataProvider));
-        $this->assertNotEmpty($serializer->response->getHeaders()->get($serializer->totalCountHeader));
-
-        $arrayDataProviderMock = $this->getMockBuilder(ArrayDataProvider::className())
-            ->disableOriginalConstructor()
-            ->getMock();
-
-        // stub getModels to prevent empty
-        $arrayDataProviderMock
-            ->method('getModels')
-            ->willReturn($expectedResult);
-
-        // stub getPagination for header
-        $arrayDataProviderMock
-            ->method('getPagination')
-            ->willReturn($dataProvider->getPagination());
-
-        // assert normal HEAD is empty response
-        $this->assertEmpty($serializer->serialize($arrayDataProviderMock));
-
-        // Test #20002:  Set up the expectation for the getModels method
-        $arrayDataProviderMock->expects($this->never())
-            ->method('getModels');
-
-        // reset Method
-        unset($_POST[$request->methodParam], $_SERVER['REQUEST_METHOD']);
-    }
-
     /**
      * @see https://github.com/yiisoft/yii2/issues/16334
      */