Implemented the rest of the User Administration Client and tests, including observable classes.

Octokit.Reactive/Clients/ObservableUserAdministrationClient.cs

@@ -2,30 +2,74 @@
 using System.Reactive;
 using System.Reactive.Threading.Tasks;
 using Octokit.Reactive.Internal;
+using System.Reactive.Linq;
+
 
 namespace Octokit.Reactive
 {
     public class ObservableUserAdministrationClient : IObservableUserAdministrationClient
     {
-        public IObservable<Unit> Demote(string login)
+        readonly IUserAdministrationClient _client;
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="ObservableUserAdministrationClient"/> class.
+        /// </summary>
+        /// <param name="client">An <see cref="IUserAdministrationClient" /> used to make the requests</param>
+        public ObservableUserAdministrationClient(IUserAdministrationClient userAdministrationClient)
         {
-            throw new NotImplementedException();
+            _client = userAdministrationClient;
         }
 
+        /// <summary>
+        /// Promotes ordinary user to a site administrator.
+        /// </summary>
+        /// <remarks>
+        /// https://developer.github.com/v3/users/administration/#promote-an-ordinary-user-to-a-site-administrator
+        /// </remarks>
+        /// <param name="login">The user to promote to administrator.</param>
+        /// <returns></returns>
         public IObservable<Unit> Promote(string login)
         {
-            Ensure.ArgumentNotNullOrEmptyString(login, "login");
-            throw new NotImplementedException();
+            return _client.Promote(login).ToObservable();
         }
 
+        /// <summary>
+        /// Demotes a site administrator to an ordinary user.
+        /// </summary>
+        /// <remarks>
+        /// https://developer.github.com/v3/users/administration/#demote-a-site-administrator-to-an-ordinary-user
+        /// </remarks>
+        /// <param name="login">The user to demote from administrator.</param>
+        /// <returns></returns>
+        public IObservable<Unit> Demote(string login)
+        {
+            return _client.Demote(login).ToObservable();
+        }
+
+        /// <summary>
+        /// Suspends a user.
+        /// </summary>
+        /// <remarks>
+        /// https://developer.github.com/v3/users/administration/#suspend-a-user
+        /// </remarks>
+        /// <param name="login">The user to suspend.</param>
+        /// <returns></returns>
         public IObservable<Unit> Suspend(string login)
         {
-            throw new NotImplementedException();
+            return _client.Suspend(login).ToObservable();
         }
 
+        /// <summary>
+        /// Unsuspends a user.
+        /// </summary>
+        /// <remarks>
+        /// https://developer.github.com/v3/users/administration/#unsuspend-a-user
+        /// </remarks>
+        /// <param name="login">The user to unsuspend.</param>
+        /// <returns></returns>
         public IObservable<Unit> Unsuspend(string login)
         {
-            throw new NotImplementedException();
+            return _client.Unsuspend(login).ToObservable();
         }
     }
 }