function test_getSessionId()
 {
     session_destroy();
     $tester = new FunctionalTester();
     $tester->setSession(['hoge' => 'fuga']);
     $this->assertEquals(26, strlen($tester->getSessionId()));
 }
 function testInitializeSession()
 {
     $tester = new FunctionalTester();
     $tester->setSession(['test' => 'hoge'], 'test');
     $tester->initializeSession('test');
     session_name('test');
     session_start();
     $this->assertEmpty($_SESSION);
 }