Fixed: Ignore free space check before grabbing if directory is missing

Closes #7273

src/NzbDrone.Core.Test/DecisionEngineTests/FreeSpaceSpecificationFixture.cs

@@ -1,3 +1,4 @@
+using System.IO;
 using FluentAssertions;
 using Moq;
 using NUnit.Framework;
@@ -90,5 +91,16 @@ namespace NzbDrone.Core.Test.DecisionEngineTests
 
             Subject.IsSatisfiedBy(_remoteEpisode, null).Accepted.Should().BeTrue();
         }
+
+        [Test]
+        public void should_return_true_if_root_folder_is_not_available()
+        {
+            WithMinimumFreeSpace(150);
+            WithSize(100);
+
+            Mocker.GetMock<IDiskProvider>().Setup(s => s.GetAvailableSpace(It.IsAny<string>())).Throws<DirectoryNotFoundException>();
+
+            Subject.IsSatisfiedBy(_remoteEpisode, null).Accepted.Should().BeTrue();
+        }
     }
 }

src/NzbDrone.Core/DecisionEngine/Specifications/FreeSpaceSpecification.cs

@@ -1,3 +1,4 @@
+using System.IO;
 using NLog;
 using NzbDrone.Common.Disk;
 using NzbDrone.Common.Extensions;
@@ -32,11 +33,21 @@ namespace NzbDrone.Core.DecisionEngine.Specifications
             }
 
             var size = subject.Release.Size;
-            var freeSpace = _diskProvider.GetAvailableSpace(subject.Series.Path);
+            var path = subject.Series.Path;
+            long? freeSpace = null;
+
+            try
+            {
+                freeSpace = _diskProvider.GetAvailableSpace(path);
+            }
+            catch (DirectoryNotFoundException)
+            {
+                // Ignore so it'll be skipped in the following checks
+            }
 
             if (!freeSpace.HasValue)
             {
-                _logger.Debug("Unable to get available space for {0}. Skipping", subject.Series.Path);
+                _logger.Debug("Unable to get available space for {0}. Skipping", path);
 
                 return Decision.Accept();
             }