class MyClass

{

    public function processRequest($request)

    {

        $queryParams = $request->getQueryParams();

        // Your processing logic based on query parameters

        return $queryParams;

    }

}

use PHPUnit\Framework\TestCase;

class MyClassTest extends TestCase

{

    public function testProcessRequestWithOverride()

    {

        // Create an instance of your class

        $myClass = new MyClass();

        // Create a mock request object

        $requestMock = $this->getMockBuilder(Request::class)

            ->getMock();

        // Override query parameters

        $queryParams = ['param1' => 'value1', 'param2' => 'value2'];

        $requestMock->expects($this->once())

            ->method('getQueryParams')

            ->willReturn($queryParams);

        // Call the method with the overridden request

        $result = $myClass->processRequest($requestMock);

        // Assert that the method processes the overridden query parameters correctly

        $this->assertEquals($queryParams, $result);

    }

}