Fix test test_arhive_push_file_exists

Author: CherkashinSergey

src/data.c

@@ -1124,7 +1124,7 @@ push_wal_file(const char *from_path, const char *to_path, bool is_compress,
 			return;
 			/* Do not copy and do not rise error. Just quit as normal. */
 		else if (!overwrite)
-			elog(ERROR, "WAL segment \"%s\" already exists.", to_path);
+			elog(ERROR, "WAL segment \"%s\" already exists.", to_path_p);
 	}
 
 	/* open backup file for write  */

tests/archive.py

@@ -1,6 +1,6 @@
 import os
 import shutil
-import zlib
+import gzip
 import unittest
 from .helpers.ptrack_helpers import ProbackupTest, ProbackupException, archive_script
 from datetime import datetime, timedelta
@@ -329,13 +329,11 @@ def test_arhive_push_file_exists(self):
 
         wal_src = os.path.join(node.data_dir, 'pg_wal', '000000010000000000000001')
         if self.archive_compress:
-            with open(wal_src, 'rb') as f_in, open(file, 'wb') as f_out:
-                original_wal = f_in.read()
-                compressed_wal = zlib.compress(original_wal, 1)
-                f_out.write(compressed_wal)
+            with open(wal_src, 'rb') as f_in, gzip.open(file, 'wb', compresslevel=1) as f_out:
+                shutil.copyfileobj(f_in, f_out)
         else:
             shutil.copyfile(wal_src, file)
-        
+
         self.switch_wal_segment(node)
         sleep(5)