[KVM-AUTOTEST PATCH 6/7] [RFC] KVM test: use error.context() in migration_with_file_transfer

[Michael Goldish <mgoldish@redhat.com>]

This is an example of a case where context information is useful.

Signed-off-by: Michael Goldish <mgoldish@redhat.com>
---
 .../kvm/tests/migration_with_file_transfer.py      |    8 +++++---
 1 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/client/tests/kvm/tests/migration_with_file_transfer.py b/client/tests/kvm/tests/migration_with_file_transfer.py
index 27c1fe1..d0159c5 100644
--- a/client/tests/kvm/tests/migration_with_file_transfer.py
+++ b/client/tests/kvm/tests/migration_with_file_transfer.py
@@ -47,24 +47,26 @@ def run_migration_with_file_transfer(test, params, env):
             finally:
                 bg.join()
 
-        logging.info("Transferring file from host to guest")
+        error.context("transferring file to guest while migrating")
         bg = kvm_utils.Thread(vm.copy_files_to,
                               (host_path, guest_path, 0, transfer_timeout))
         run_and_migrate(bg)
 
-        logging.info("Transferring file back from guest to host")
+        error.context("transferring file back to host while migrating")
         bg = kvm_utils.Thread(vm.copy_files_from,
                               (guest_path, host_path_returned, 0,
                                transfer_timeout))
         run_and_migrate(bg)
 
-        # Make sure the returned file is indentical to the original one
+        # Make sure the returned file is identical to the original one
+        error.context("comparing hashes")
         orig_hash = client_utils.hash_file(host_path)
         returned_hash = client_utils.hash_file(host_path_returned)
         if orig_hash != returned_hash:
             raise error.TestFail("Returned file hash (%s) differs from "
                                  "original one (%s)" % (returned_hash,
                                                         orig_hash))
+        error.context("cleanup")
     finally:
         session.close()
         if os.path.isfile(host_path):
-- 
1.7.3.4