/**
* @covers ::__construct
* @covers ::setOptions
* @covers ::read
* @covers ::write
* @covers ::clear
*/
public function testClear()
{
$session = new Session();
$session->write('key1', 'value1');
$session->write('key2', 'value2');
$session->write('key3', 'value3');
$session->clear('key1');
$this->assertArrayNotHasKey('key1', $_SESSION);
$this->assertArrayHasKey('key2', $_SESSION);
$session->clear();
$this->assertEmpty($_SESSION);
}