patman: Handle unicode in _ProjectConfigParser tests

With Python 2.7.15rc1, ConfigParser.SafeConfigParser has unfortunately
started returning unicode, for unknown reasons. Adjust the code to handle
this by converting everything to unicode. We cannot convert things to
ASCII since email addresses may be encoded with UTF-8.

Signed-off-by: Simon Glass <sjg@chromium.org>

tools/patman/settings.py

@@ -58,25 +58,25 @@ class _ProjectConfigParser(ConfigParser.SafeConfigParser):
     >>> config = _ProjectConfigParser("zzz")
     >>> config.readfp(StringIO(sample_config))
     >>> config.get("alias", "enemies")
-    'Evil <evil@example.com>'
+    u'Evil <evil@example.com>'
 
     # Check to make sure that alias gets overridden by project.
     >>> config = _ProjectConfigParser("sm")
     >>> config.readfp(StringIO(sample_config))
     >>> config.get("alias", "enemies")
-    'Green G. <ugly@example.com>'
+    u'Green G. <ugly@example.com>'
 
     # Check to make sure that settings get merged with project.
     >>> config = _ProjectConfigParser("linux")
     >>> config.readfp(StringIO(sample_config))
     >>> sorted(config.items("settings"))
-    [('am_hero', 'True'), ('process_tags', 'False')]
+    [(u'am_hero', u'True'), (u'process_tags', u'False')]
 
     # Check to make sure that settings works with unknown project.
     >>> config = _ProjectConfigParser("unknown")
     >>> config.readfp(StringIO(sample_config))
     >>> sorted(config.items("settings"))
-    [('am_hero', 'True')]
+    [(u'am_hero', u'True')]
     """
     def __init__(self, project_name):
         """Construct _ProjectConfigParser.
@@ -99,6 +99,17 @@ class _ProjectConfigParser(ConfigParser.SafeConfigParser):
         for setting_name, setting_value in project_defaults.items():
             self.set(project_settings, setting_name, setting_value)
 
+    def _to_unicode(self, val):
+        """Make sure a value is of type 'unicode'
+
+        Args:
+            val: string or unicode object
+
+        Returns:
+            unicode version of val
+        """
+        return val if isinstance(val, unicode) else val.decode('utf-8')
+
     def get(self, section, option, *args, **kwargs):
         """Extend SafeConfigParser to try project_section before section.
 
@@ -108,14 +119,15 @@ class _ProjectConfigParser(ConfigParser.SafeConfigParser):
             See SafeConfigParser.
         """
         try:
-            return ConfigParser.SafeConfigParser.get(
+            val = ConfigParser.SafeConfigParser.get(
                 self, "%s_%s" % (self._project_name, section), option,
                 *args, **kwargs
             )
         except (ConfigParser.NoSectionError, ConfigParser.NoOptionError):
-            return ConfigParser.SafeConfigParser.get(
+            val = ConfigParser.SafeConfigParser.get(
                 self, section, option, *args, **kwargs
             )
+        return self._to_unicode(val)
 
     def items(self, section, *args, **kwargs):
         """Extend SafeConfigParser to add project_section to section.
@@ -150,7 +162,8 @@ class _ProjectConfigParser(ConfigParser.SafeConfigParser):
 
         item_dict = dict(top_items)
         item_dict.update(project_items)
-        return item_dict.items()
+        return {(self._to_unicode(item), self._to_unicode(val))
+                for item, val in item_dict.iteritems()}
 
 def ReadGitAliases(fname):
     """Read a git alias file. This is in the form used by git: