Improve root folder health check

src/NzbDrone.Core.Test/RootFolderTests/GetBestRootFolderPathFixture.cs

@@ -0,0 +1,47 @@
+using System.Linq;
+using FluentAssertions;
+using Moq;
+using NUnit.Framework;
+using NzbDrone.Common.Disk;
+using NzbDrone.Core.RootFolders;
+using NzbDrone.Core.Test.Framework;
+
+namespace NzbDrone.Core.Test.RootFolderTests
+{
+    [TestFixture]
+    public class GetBestRootFolderPathFixture : CoreTest<RootFolderService>
+    {
+        private void GivenRootFolders(params string[] paths)
+        {
+            Mocker.GetMock<IRootFolderRepository>()
+                .Setup(s => s.All())
+                .Returns(paths.Select(p => new RootFolder { Path = p }));
+        }
+
+        [Test]
+        public void should_return_root_folder_that_is_parent_path()
+        {
+            GivenRootFolders(@"C:\Test\TV", @"D:\Test\TV");
+            Subject.GetBestRootFolderPath(@"C:\Test\TV\Series Title").Should().Be(@"C:\Test\TV");
+        }
+
+        [Test]
+        public void should_return_root_folder_that_is_grandparent_path()
+        {
+            GivenRootFolders(@"C:\Test\TV", @"D:\Test\TV");
+            Subject.GetBestRootFolderPath(@"C:\Test\TV\S\Series Title").Should().Be(@"C:\Test\TV");
+        }
+
+        [Test]
+        public void should_get_parent_path_from_diskProvider_if_matching_root_folder_is_not_found()
+        {
+            var seriesPath = @"T:\Test\TV\Series Title";
+
+            GivenRootFolders(@"C:\Test\TV", @"D:\Test\TV");
+            Subject.GetBestRootFolderPath(seriesPath);
+
+            Mocker.GetMock<IDiskProvider>()
+                .Verify(v => v.GetParentFolder(seriesPath), Times.Once);
+        }
+    }
+}

src/NzbDrone.Core.Test/RootFolderTests/RootFolderServiceFixture.cs

@@ -15,7 +15,6 @@ using NzbDrone.Test.Common;
 namespace NzbDrone.Core.Test.RootFolderTests
 {
     [TestFixture]
-
     public class RootFolderServiceFixture : CoreTest<RootFolderService>
     {
         [SetUp]

src/NzbDrone.Core/HealthCheck/Checks/RootFolderCheck.cs

@@ -1,6 +1,7 @@
 using System.Linq;
 using NzbDrone.Common.Disk;
 using NzbDrone.Core.MediaFiles.Events;
+using NzbDrone.Core.RootFolders;
 using NzbDrone.Core.Tv;
 using NzbDrone.Core.Tv.Events;
 
@@ -14,20 +15,23 @@ namespace NzbDrone.Core.HealthCheck.Checks
     {
         private readonly ISeriesService _seriesService;
         private readonly IDiskProvider _diskProvider;
+        private readonly IRootFolderService _rootFolderService;
 
-        public RootFolderCheck(ISeriesService seriesService, IDiskProvider diskProvider)
+        public RootFolderCheck(ISeriesService seriesService, IDiskProvider diskProvider, IRootFolderService rootFolderService)
         {
             _seriesService = seriesService;
             _diskProvider = diskProvider;
+            _rootFolderService = rootFolderService;
         }
 
         public override HealthCheck Check()
         {
-            var missingRootFolders = _seriesService.GetAllSeries()
-                                                   .Select(s => _diskProvider.GetParentFolder(s.Path))
-                                                   .Distinct()
-                                                   .Where(s => !_diskProvider.FolderExists(s))
-                                                   .ToList();
+            var rootFolders = _seriesService.GetAllSeries()
+                                                           .Select(s => _rootFolderService.GetBestRootFolderPath(s.Path))
+                                                           .Distinct();
+
+            var missingRootFolders = rootFolders.Where(s => !_diskProvider.FolderExists(s))
+                                                          .ToList();
 
             if (missingRootFolders.Any())
             {

src/NzbDrone.Core/RootFolders/RootFolderService.cs

@@ -171,7 +171,7 @@ namespace NzbDrone.Core.RootFolders
 
             if (possibleRootFolder == null)
             {
-                return Path.GetDirectoryName(path);
+                return _diskProvider.GetParentFolder(path);
             }
 
             return possibleRootFolder.Path;