use two tests instead of one

tests/lib/user/session.php

@@ -39,7 +39,7 @@ class Session extends \Test\TestCase {
 		$session->expects($this->once())
 			->method('get')
 			->with('user_id')
-			->will($this->returnValue(null));
+			->will($this->returnValue('foo'));
 
 		$backend = $this->getMock('OC_User_Dummy');
 		$backend->expects($this->once())
@@ -52,14 +52,28 @@ class Session extends \Test\TestCase {
 
 		$userSession = new \OC\User\Session($manager, $session);
 		$isLoggedIn = $userSession->isLoggedIn();
-		$this->assertFalse($isLoggedIn);
+		$this->assertTrue($isLoggedIn);
+	}
 
+	public function testNotLoggedIn() {
+		$session = $this->getMock('\OC\Session\Memory', array(), array(''));
 		$session->expects($this->once())
 			->method('get')
 			->with('user_id')
-			->will($this->returnValue('foo'));
+			->will($this->returnValue(null));
+
+		$backend = $this->getMock('OC_User_Dummy');
+		$backend->expects($this->once())
+			->method('userExists')
+			->with('foo')
+			->will($this->returnValue(true));
+
+		$manager = new \OC\User\Manager();
+		$manager->registerBackend($backend);
+
+		$userSession = new \OC\User\Session($manager, $session);
 		$isLoggedIn = $userSession->isLoggedIn();
-		$this->assertTrue($isLoggedIn);
+		$this->assertFalse($isLoggedIn);
 	}
 
 	public function testSetUser() {