Ensure Accounts is not null

src/GitHub.App/ViewModels/RepositoryCreationViewModel.cs

@@ -29,6 +29,8 @@ namespace GitHub.ViewModels
         {
             this.operatingSystem = operatingSystem;
 
+            Accounts = new ReactiveList<IAccount>();
+
             safeRepositoryName = this.WhenAny(x => x.RepositoryName, x => x.Value)
                 .Select(x => x != null ? GetSafeRepositoryName(x) : null)
                 .ToProperty(this, x => x.SafeRepositoryName);

src/UnitTests/GitHub.App/ViewModels/RepositoryCreationViewModelTests.cs

@@ -72,4 +72,14 @@ public class RepositoryCreationViewModelTests
             Assert.Equal(@"c:\fake\dev", vm.BaseRepositoryPath);
         }
     }
+
+    public class TheAccountsProperty
+    {
+        [Fact]
+        public void StartsOffEmpty()
+        {
+            var vm = new RepositoryCreationViewModel(Substitute.For<IOperatingSystem>());
+            Assert.Empty(vm.Accounts);
+        }
+    }
 }