Fix up docstring of test_create_backup_index_max_file_length()

diff --git a/testing/test_deltatar.py b/testing/test_deltatar.py
index 75e53c2..2350e7c 100644 (file)
--- a/testing/test_deltatar.py
+++ b/testing/test_deltatar.py
@@ -223,12 +223,11 @@ class DeltaTarTest(BaseTest):
 
     def test_create_backup_index_max_file_length (self):
         """
-        Creates a full backup including one file that exceeds the (purposely
-        lowered) upper bound on GCM encrypted objects. This will yield two
-        encrypted objects for one plaintext file.
+        Creates a full backup with a too large index file for the upper bound
+        of the GCM encryption. Since the index file has a fixed IV file counter
+        of AES_GCM_IV_CNT_INDEX, we expect the crypto layer to abort.
 
-        Success is verified by splitting the archive at object boundaries and
-        counting the parts.
+        60+ GB of (potentially compressed) index file should last for a while...
         """
         if self.MODE_COMPRESSES is True:
             raise SkipTest ("GCM file length test not meaningful with compression.")