Add tests

Octokit.Tests.Integration/Reactive/ObservableRepositoriesClientTests.cs

@@ -1,4 +1,5 @@
-using System.Reactive.Linq;
+using System.Linq;
+using System.Reactive.Linq;
 using System.Threading.Tasks;
 using Octokit.Reactive;
 using Xunit;
@@ -27,5 +28,26 @@ namespace Octokit.Tests.Integration
                 Assert.False(repository2.Fork);
             }
         }
+
+        public class TheGetAllPublicSinceMethod
+        {
+            [IntegrationTest]
+            public async Task ReturnsAllPublicReposSinceLastSeen()
+            {
+                var github = Helper.GetAuthenticatedClient();
+
+                var client = new ObservableRepositoriesClient(github);
+                var request = new PublicRepositoryRequest
+                {
+                    Since = 32732250
+                };
+                var repositories = await client.GetAllPublic(request).ToArray();
+                Assert.NotNull(repositories);
+                Assert.True(repositories.Any());
+                Assert.Equal(32732252, repositories[0].Id);
+                Assert.False(repositories[0].Private);
+                Assert.Equal("zad19", repositories[0].Name);
+            }
+        }
     }
 }