From 955dbebc03cf9b5d9ae0d6b2af1f8c277db0649f Mon Sep 17 00:00:00 2001
From: Serge <8523760+sergethedev17@users.noreply.github.com>
Date: Tue, 1 Jun 2021 02:51:42 +1000
Subject: Check contents of written test file

Before performing test write, reset stream Position to 0, otherwise test performs zero-byte write.
When performing test read, verify that file was written correctly.
---
 Duplicati/Library/Backend/AlternativeFTP/AlternativeFTPBackend.cs | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/Duplicati/Library/Backend/AlternativeFTP/AlternativeFTPBackend.cs b/Duplicati/Library/Backend/AlternativeFTP/AlternativeFTPBackend.cs
index 0e027df83..28f9c0403 100644
--- a/Duplicati/Library/Backend/AlternativeFTP/AlternativeFTPBackend.cs
+++ b/Duplicati/Library/Backend/AlternativeFTP/AlternativeFTPBackend.cs
@@ -451,6 +451,7 @@ namespace Duplicati.Library.Backend.AlternativeFTP
             var stream = new MemoryStream();
             var writer = new StreamWriter(stream) { AutoFlush = true };
             writer.Write(str);
+            stream.Position = 0;
             return stream;
         }
 
@@ -488,11 +489,14 @@ namespace Duplicati.Library.Backend.AlternativeFTP
             }
 
             // Test read permissions
-            using (var stream = new MemoryStream())
+            using (var testStream = new MemoryStream())
             {
                 try
                 {
-                    Get(TEST_FILE_NAME, stream);
+                    Get(TEST_FILE_NAME, testStream);
+                    var readValue = System.Text.Encoding.Default.GetString(testStream.ToArray());
+                    if (readValue != TEST_FILE_CONTENT)
+                        throw new Exception("Test file corrupted.");
                 }
                 catch (Exception e)
                 {
-- 
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