/**
* @dataProvider encodingProvider
*/
public function testPrepareHeadersWithJsonHeader($encoding, $header)
{
$this->_object->setEncoding($encoding);
$this->assertInstanceOf($this->_instanceOf, $this->_object->prepareHeaders());
$headers = $this->_object->getHeaders();
$this->assertEquals($header, "Content-Type: " . $headers['Content-Type']);
}