phpunit testing, check the arguments passed to function

I need to test my class, and the class make an Curl request.

I want to check the data passed to the curl request, so this is the code:

class SendCurl {

    /** @var GuzzleHttp\Client */
    protected $client;

    public function __construct(\GuzzleHttp\Client $client) {
         $this->client = $client;
    }

    public function send() {
        $this->curl();
    }

    protected function curl() {
        $this->client->get(
            $this->statHatUrl, [
                'headers'         => ['Content-Type' => 'application/json'],
                'body'            => $this->getValidJson(),
            ]
        );
    }

}

now as you can see here, I call this class like this:

$api = new SendCurl($client);
$api->send();

now I want to check the data send to the curl get request so what I did till now is to use mockery

  $client = Mockery::mock('GuzzleHttp\Client');
  $client->shouldReceive('get')
         ->once()
         ->with(Mockery::type('string'), Mockery::type('array'));

  $obj = new SendCurl($client);
  $obj->send();

so I successfully check that the first parameter to the "get" method of the client is a string, and that the second parameter is an array.

BUT how do I compare them to an exact value.

something like:

 ->with(Mockery::type('string') && equalsTo('www.WhatEver.com'))

dont mind the syntax, only the idea.