Unit testing a controller

We might have a simple project with a User model and UserRepo, defined as follows:

case class User(id: Option[Long], loginId: String, name: Option[String],
  contactNo: Option[String], dob: Option[Long], address: Option[String])
 
object User{
  implicit val userWrites = Json.writes[User]
}

trait UserRepo {
  def authenticate(loginId: String, password: String): Boolean

  def create(u: User, host: String, password: String): Option[Long]

  def update(u: User): Boolean

  def findByLogin(loginId: String): Option[User]

  def delete(userId: Long): Boolean

  def find(userId: Long): Option[User]

  def getAll: Seq[User]

  def updateStatus(userId: Long, isActive: Boolean): Int

  def updatePassword(userId: Long, password: String): Int
}

In this project, we need to test a getUser method of UserController—a controller that is defined to access user details, which are handled by the user model, where UserController is defined as follows:

object UserController extends Controller...