Fix for #200

(cherry picked from commit 92f702cf86a9dae1b1b6e90c3152dabc6c21534e)

Author: Jeavon

src/UmbracoFileSystemProviders.Azure.Tests/AzureBlobFileSystemCommonTest.cs

@@ -639,13 +639,17 @@ public void TestGetSubDirectoriesNone()
             // Arrange
             AzureBlobFileSystem provider = this.CreateAzureBlobFileSystem(containerName: "forms-data");
             provider.AddFile("forms/b5e2fab3-040d-4328-ac74-cf7f7ebe3918.json", Stream.Null);
+            provider.AddFile("workflows/b5e2fab3-040d-4328-ac74-cf7f7ebe3918.json", Stream.Null);
 
             // Act
             IEnumerable<string> actual = provider.GetDirectories("forms");
 
             // Assert
             string[] expected = { };
             Assert.IsTrue(expected.SequenceEqual(actual));
+
+            // Tidy up after test
+            provider.DeleteDirectory("forms");
         }
     }
 }

src/UmbracoFileSystemProviders.Azure/AzureFileSystem.cs

@@ -518,12 +518,13 @@ public IEnumerable<string> GetDirectories(string path)
             var directory = this.GetDirectoryReference(path);
 
             var listedBlobs = directory.ListBlobs();
-            var prefixes = listedBlobs.Where(blob => blob.IsPrefix).Select(x=>x.Prefix).ToList();
-            var blobPrefixes = listedBlobs.Where(x => x.IsBlob && x.Blob.Name.LastIndexOf('/') >= 0).Select(x => x.Blob.Name.Substring(0, x.Blob.Name.LastIndexOf('/') + 1));
-
-
+            var prefixes = listedBlobs.Where(blob => blob.IsPrefix).Select(x => x.Prefix).ToList();
+            var blobPrefixes = listedBlobs.Where(x => x.IsBlob && x.Blob.Name.LastIndexOf('/') >= 0)
+                .Select(x => x.Blob.Name.Substring(0, x.Blob.Name.LastIndexOf('/') + 1));
+            
             // Always get last segment for media sub folder simulation. E.g 1001, 1002
-            var all = prefixes.Union(blobPrefixes);
+            var all = prefixes.Union(blobPrefixes).Where(x => !x.Equals(path + "/"));
+
             return all.Select(cd => cd.TrimEnd('/'));
         }
 
@@ -853,7 +854,7 @@ private AzureBlobDirectory GetDirectoryReference(string path)
             Current.Logger.Debug<AzureBlobFileSystem>($"GetDirectoryReference(path) method executed with path:{path}");
 
             string blobPath = this.FixPath(path);
-            return new AzureBlobDirectory(cloudBlobContainer,blobPath);
+            return new AzureBlobDirectory(cloudBlobContainer, blobPath);
         }
 
         /// <summary>