Fixed adding of Newznab provider.

NzbDrone.Core.Test/ProviderTests/NewznabProviderTest.cs

@@ -56,6 +56,46 @@ namespace NzbDrone.Core.Test.ProviderTests
             db.Single<NewznabDefinition>(result).Url.Should().Be(expectedUrl);
         }
 
+        [Test]
+        public void Save_should_clean_url_before_inserting_when_url_is_not_empty()
+        {
+            //Setup
+            var newznab = new NewznabDefinition { Name = "Newznab Provider", Enable = true, Url = "" };
+            var expectedUrl = "";
+
+            var mocker = new AutoMoqer();
+            var db = MockLib.GetEmptyDatabase();
+            mocker.SetConstant(db);
+
+            //Act
+            var result = mocker.Resolve<NewznabProvider>().Save(newznab);
+
+            //Assert
+            db.Single<NewznabDefinition>(result).Url.Should().Be(expectedUrl);
+        }
+
+        [Test]
+        public void Save_should_clean_url_before_updating_when_url_is_not_empty()
+        {
+            //Setup
+            var newznab = new NewznabDefinition { Name = "Newznab Provider", Enable = true, Url = "http://www.nzbdrone.com" };
+            var expectedUrl = "";
+            var newUrl = "";
+
+            var mocker = new AutoMoqer();
+            var db = MockLib.GetEmptyDatabase();
+            mocker.SetConstant(db);
+
+            newznab.Id = Convert.ToInt32(db.Insert(newznab));
+            newznab.Url = newUrl;
+
+            //Act
+            var result = mocker.Resolve<NewznabProvider>().Save(newznab);
+
+            //Assert
+            db.Single<NewznabDefinition>(result).Url.Should().Be(expectedUrl);
+        }
+
         [Test]
         public void SaveAll_should_clean_urls_before_updating()
         {

NzbDrone.Core/Providers/NewznzbProvider.cs

@@ -37,7 +37,8 @@ namespace NzbDrone.Core.Providers
 
         public virtual int Save(NewznabDefinition definition)
         {
-            //Cleanup the URL
+            //Cleanup the URL if it is not null or whitespace
+            if (!String.IsNullOrWhiteSpace(definition.Url))
                 definition.Url = (new Uri(definition.Url).ParentUriString());
 
             if (definition.Id == 0)

NzbDrone.Web/Controllers/SettingsController.cs

@@ -299,7 +299,7 @@ namespace NzbDrone.Web.Controllers
             return new JsonResult { Data = "ok" };
         }
 
-        public ViewResult AddNewznabProvider()
+        public PartialViewResult AddNewznabProvider()
         {
             var newznab = new NewznabDefinition
             {
@@ -312,7 +312,7 @@ namespace NzbDrone.Web.Controllers
 
             ViewData["ProviderId"] = id;
 
-            return View("NewznabProvider", newznab);
+            return PartialView("NewznabProvider", newznab);
         }
 
         public ActionResult GetNewznabProviderView(NewznabDefinition provider)