[master] Add lettuce test for mixed-case query

tests/lettuce/features/example.feature

@@ -132,6 +132,36 @@ Feature: Example feature
         A query for www.example.org to 127.0.0.1:47806 should have rcode NOERROR
         A query for www.example.org type A class IN to 127.0.0.1:47806 should have rcode NOERROR
 
+    Scenario: example.org mixed-case query
+        # This scenario performs a mixed-case query and checks that the
+        # response has the name copied from the question exactly
+        # (without any change in case). For why this is necessary, see
+        # section 5.2 of:
+        # http://tools.ietf.org/html/draft-vixie-dnsext-dns0x20-00
+
+        Given I have bind10 running with configuration example.org.config
+        And wait for bind10 stderr message BIND10_STARTED_CC
+        And wait for bind10 stderr message CMDCTL_STARTED
+        And wait for bind10 stderr message AUTH_SERVER_STARTED
+
+        bind10 module Auth should be running
+        And bind10 module Resolver should not be running
+        And bind10 module Xfrout should not be running
+        And bind10 module Zonemgr should not be running
+        And bind10 module Xfrin should not be running
+        And bind10 module Stats should not be running
+        And bind10 module StatsHttpd should not be running
+
+        A query for wWw.eXaMpLe.Org should have rcode NOERROR
+        The last query response should have qdcount 1
+        The last query response should have ancount 1
+        The last query response should have nscount 3
+        The last query response should have adcount 0
+        The question section of the last query response should exactly be
+        """
+        ;wWw.eXaMpLe.Org. IN A
+        """
+
     Scenario: changing database
         # This scenario contains a lot of 'wait for' steps
         # If those are not present, the asynchronous nature of the application

tests/lettuce/features/terrain/querying.py

@@ -110,6 +110,8 @@ class QueryResult(object):
             self.line_handler = self.parse_answer
         elif line == ";; OPT PSEUDOSECTION:\n":
             self.line_handler = self.parse_opt
+        elif line == ";; QUESTION SECTION:\n":
+            self.line_handler = self.parse_question
         elif line == ";; AUTHORITY SECTION:\n":
             self.line_handler = self.parse_authority
         elif line == ";; ADDITIONAL SECTION:\n":
@@ -290,8 +292,8 @@ def check_last_query(step, item, value):
     assert str(value) == str(lq_val),\
            "Got: " + str(lq_val) + ", expected: " + str(value)
 
-@step('([a-zA-Z]+) section of the last query response should be')
+@step('([a-zA-Z]+) section of the last query response should (exactly )?be')
-def check_last_query_section(step, section):
+def check_last_query_section(step, section, exact):
     """
     Check the entire contents of the given section of the response of the last
     query.
@@ -330,7 +332,8 @@ def check_last_query_section(step, section):
     # replace whitespace of any length by one space
     response_string = re.sub("[ \t]+", " ", response_string)
     expect = re.sub("[ \t]+", " ", step.multiline)
-    # lowercase them
+    # lowercase them unless we need to do an exact match
+    if exact is None:
         response_string = response_string.lower()
         expect = expect.lower()
     # sort them