gpconfig: add UTF-8 test case

application_name explicitly filters non-ASCII bytes, so we went with
search_path.

We had to work around some ASCII/Unicode mixing in the tests, which will
probably come back to haunt us during the Python 3 move.
Co-authored-by: NMark Sliva <msliva@pivotal.io>

gpMgmt/test/behave/mgmt_utils/gpconfig.feature

@@ -78,6 +78,7 @@ Feature: gpconfig integration tests
         | application_name             |  string  | zzzzzz     | ''       | ''         |            | ''                | ''                     | ''           | ''                |                   |
         | application_name             |  string  | boo        | "\'"     | '\\'''     | \'         | "\'"              | '\\'''                 | "\'"         | '\\'''            | \'                |
         | application_name             |  string  | boo        | "''''"   | '''''''''' | ''''       | "''"              | ''''''                 | "'"          | ''''              | '                 |
+        | search_path                  |  string  | boo        | Ομήρου   | 'Ομήρου'   | Ομήρου     | Ομήρου            | 'Ομήρου'               | Ομήρου       | 'Ομήρου'          | Ομήρου            |
 
     @concourse_cluster
     @demo_cluster

gpMgmt/test/behave/mgmt_utils/steps/mgmt_utils.py

+import codecs
 import math
 import fnmatch
 import getpass
@@ -1325,9 +1326,11 @@ def impl(context, filename, output):
 def find_string_in_master_data_directory(context, filename, output, escapeStr=False):
     contents = ''
     file_path = os.path.join(master_data_dir, filename)
-    with open(file_path) as fr:
-        for line in fr:
+
+    with codecs.open(file_path, encoding='utf-8') as f:
+        for line in f:
             contents = line.strip()
+
     if escapeStr:
         output = re.escape(output)
     pat = re.compile(output)
@@ -1419,7 +1422,9 @@ def impl(context, filename, output):
         cmd_str = 'ssh %s "tail -n1 %s"' % (host, filepath)
         cmd = Command(name='Running remote command: %s' % cmd_str, cmdStr=cmd_str)
         cmd.run(validateAfter=True)
-        if output not in cmd.get_stdout():
+
+        actual = cmd.get_stdout().decode('utf-8')
+        if output not in actual:
             raise Exception('File %s on host %s does not contain "%s"' % (filepath, host, output))
 
 @given('the gpfdists occupying port {port} on host "{hostfile}"')

gpMgmt/test/behave_utils/utils.py

@@ -129,8 +129,13 @@ def check_stdout_msg(context, msg, escapeStr = False):
     if escapeStr:
         msg = re.escape(msg)
     pat = re.compile(msg)
-    if not pat.search(context.stdout_message):
-        err_str = "Expected stdout string '%s' and found: '%s'" % (msg, context.stdout_message)
+
+    actual = context.stdout_message
+    if isinstance(msg, unicode):
+        actual = actual.decode('utf-8')
+
+    if not pat.search(actual):
+        err_str = "Expected stdout string '%s' and found: '%s'" % (msg, actual)
         raise Exception(err_str)