public void TestRemoveRole()
{
_authorizationService = new AbilityAuthorizationService(new UserRepository(), new RoleRepository(), new AbilityRepository());
_authorizationService.AddRole(_role1);
_authorizationService.AddRole(_role2);
IEnumerable<IRole> roles = _authorizationService.GetRoles();
Assert.AreEqual(2, roles.Count());
Assert.AreEqual(_role1, roles.First());
Assert.AreEqual(_role2, roles.Last());
_authorizationService.RemoveRole("Role1");
roles = _authorizationService.GetRoles();
Assert.AreEqual(1, roles.Count());
Assert.AreEqual(_role2, roles.First());
}