Support writing bytes

system_test/e2e/auto_backup.py

@@ -96,7 +96,7 @@ class TestAutoBackupS3(unittest.TestCase):
     os.environ['AWS_SECRET_ACCESS_KEY'] = os.environ['RQLITE_S3_SECRET_ACCESS_KEY']
 
     backupData = download_s3_object('rqlite-testing-circleci', path)
-    backupFile = write_random_file(backupData)
+    backupFile = write_random_file(backupData, mode='wb')
     conn = sqlite3.connect(backupFile)
     c = conn.cursor()
     c.execute('SELECT * FROM foo')

system_test/e2e/helpers.py

@@ -29,8 +29,8 @@ def random_string(n):
   letters = string.ascii_lowercase
   return ''.join(random.choice(letters) for i in range(n))
 
-def write_random_file(data):
-  f = tempfile.NamedTemporaryFile('w', delete=False)
+def write_random_file(data, mode='w'):
+  f = tempfile.NamedTemporaryFile(mode, delete=False)
   f.write(data)
   f.close()
   return f.name