asp.net MVC3 Unit Testing - Role Provider - asp.net-mvc

Question

Unit testing of the role provider to fail.
[TestMethod]
public void FindUsersInRole()
{
Mock<IUsersInRoleRepository> userInRoleMock = new Mock<IUsersInRoleRepository>();
userInRoleMock.Setup(m => m.UsersInRoles).Returns(new UsersInRole[] {
new UsersInRole { UserId = Guid.Parse("aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa"), RoleId = Guid.Parse("aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa") },
new UsersInRole { UserId = Guid.Parse("bbbbbbbb-bbbb-bbbb-bbbb-bbbbbbbbbbbb"), RoleId = Guid.Parse("aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa") },
new UsersInRole { UserId = Guid.Parse("cccccccc-cccc-cccc-cccc-cccccccccccc"), RoleId = Guid.Parse("aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa") },
new UsersInRole { UserId = Guid.Parse("dddddddd-dddd-dddd-dddd-dddddddddddd"), RoleId = Guid.Parse("aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa") },
new UsersInRole { UserId = Guid.Parse("eeeeeeee-eeee-eeee-eeee-eeeeeeeeeeee"), RoleId = Guid.Parse("bbbbbbbb-bbbb-bbbb-bbbb-bbbbbbbbbbbb") }
}.AsQueryable());
Mock<IRoleRepository> roleMock = new Mock<IRoleRepository>();
roleMock.Setup(m => m.Roles).Returns(new Role[] {
new Role { RoleId = Guid.Parse("aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa"), RoleName = "test" },
new Role { RoleId = Guid.Parse("bbbbbbbb-bbbb-bbbb-bbbb-bbbbbbbbbbbb"), RoleName = "admin" }
}.AsQueryable());
Mock<IUserRepository> userMock = new Mock<IUserRepository>();
userMock.Setup(m => m.Users).Returns(new User[] {
new User { UserId = Guid.Parse("aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa"), UserAccount = "abcdef" },
new User { UserId = Guid.Parse("bbbbbbbb-bbbb-bbbb-bbbb-bbbbbbbbbbbb"), UserAccount = "bcdef" },
new User { UserId = Guid.Parse("cccccccc-cccc-cccc-cccc-cccccccccccc"), UserAccount = "cdef" },
new User { UserId = Guid.Parse("dddddddd-dddd-dddd-dddd-dddddddddddd"), UserAccount = "bcdf" },
new User { UserId = Guid.Parse("eeeeeeee-eeee-eeee-eeee-eeeeeeeeeeee"), UserAccount = "abcde" }
}.AsQueryable());
RoleProvider target = new RoleProvider(userMock.Object, roleMock.Object, userInRoleMock.Object);
string[] result = target.FindUsersInRole("test", "cde");
Assert.AreEqual(result[0], "abcdef");
Assert.AreEqual(result[1], "bcdef");
Assert.AreEqual(result[2], "cdef");
}
Unit Test Code
string[] result = target.FindUsersInRole("test", "cde"); <-- error
FindUsersInRole - Gets an array of user names in a role where the user name contains the specified user name to match.
System.NullReferenceException is raised and try to debug.
Why NullReferenceException?
PS - FindUsersInRole (RoleProvider)
public override string[] FindUsersInRole(string roleName, string userAccountToMatch)
{
Guid roleId = roleRepository.GetRole(roleName).RoleId; // RoleId Retrun.. NullReferenceException
var roleInUsers = (from ru in usersInRoleRepository.UsersInRoles
where ru.RoleId == roleId
select ru.UserId).ToArray();
var findUserResult = (from u in userRepository.Users
where roleInUsers.Contains(u.UserId) && u.UserAccount.Contains(userAccountToMatch)
select u.UserAccount).ToArray();
return findUserResult;
}

Answer 1

Your cde is not a fake user in a mackUserAccount . So its return null.
try this below code string[] result = target.FindUsersInRole("test", "abcdef"); instead of
string[] result = target.FindUsersInRole("test", "cde");