[Testfix] Fix TypeError for python3

Problem: Test is failing with below traceback
when ran with python3 as default.
`
Traceback (most recent call last):
  File "<string>", line 1, in <module>
TypeError: a bytes-like object is required, not 'str'
`
Solution:
Added ''.encode() which will fix the issue when ran
using both python2 and python3

Added a check for core file on the client node.

Change-Id: I8f800f5fad97c3b7591db79ea51203e5293a1f69
Signed-off-by: Bala Konda Reddy M <bala12352@gmail.com>

1 files changed, 6 insertions, 5 deletions

diff --git a/tests/functional/disperse/test_ec_truncate_file_with_brick_down.py b/tests/functional/disperse/test_ec_truncate_file_with_brick_down.py
index c4daf0a82..c0db19122 100644
--- a/tests/functional/disperse/test_ec_truncate_file_with_brick_down.py
+++ b/tests/functional/disperse/test_ec_truncate_file_with_brick_down.py
@@ -109,8 +109,8 @@ class TestEcTruncateFileWithBrickDown(GlusterBaseClass):
 
         # write data to the file
         cmd = ('''python -c "import os, sys;fd = os.open('{}', os.O_RDWR) ;'''
-               '''os.write(fd, 'This is test after truncate'); os.close(fd)"'''
-               .format(file_name))
+               '''os.write(fd, 'This is test after truncate'.encode());'''
+               ''' os.close(fd)"'''.format(file_name))
         ret, _, err = g.run(self.mounts[0].client_system, cmd)
         self.assertEqual(ret, 0, err)
         g.log.info("Data written successfully on to the file")
@@ -119,6 +119,7 @@ class TestEcTruncateFileWithBrickDown(GlusterBaseClass):
         ret = monitor_heal_completion(self.mnode, self.volname)
         self.assertTrue(ret, "Heal pending for file {}".format(file_name))
 
-        # check for any crashes
-        ret = is_core_file_created(self.servers, test_timestamp)
-        self.assertTrue(ret, "Cores found on the servers")
+        # check for any crashes on servers and client
+        for nodes in (self.servers, [self.clients[0]]):
+            ret = is_core_file_created(nodes, test_timestamp)
+            self.assertTrue(ret, "Cores found on the {} nodes".format(nodes))