->method('getUserGroups')
->with('user1')
->will($this->returnValue(null));
-// $backend->expects($this->any())
-// ->method('groupExists')
-// ->with('group1')
-// ->will($this->returnValue(true));
-// $backend->expects($this->once())
-// ->method('implementsActions')
-// ->will($this->returnValue(true));
-// $backend->expects($this->once())
-// ->method('inGroup')
-// ->will($this->returnValue(true));
-// $backend->expects($this->once())
-// ->method('removeFromGroup')
-// ->will($this->returnValue(true));
/**
* @var \OC\User\Manager $userManager