test_labeled_responses: Actually check 'label' tags aren't relayed

The existing assertion's comment said it checked the label wasn't
relayed, but the code actually let any tag through.

irctest/patma.py

@@ -35,6 +35,14 @@ class StrRe(Operator):
         return f"StrRe(r'{self.regexp}')"
 
 
+@dataclasses.dataclass(frozen=True)
+class NotStrRe(Operator):
+    regexp: str
+
+    def __repr__(self) -> str:
+        return f"NotStrRe(r'{self.regexp}')"
+
+
 @dataclasses.dataclass(frozen=True)
 class RemainingKeys(Operator):
     """Used in a dict pattern to match all remaining keys.
@@ -71,6 +79,9 @@ def match_string(got: Optional[str], expected: Union[str, Operator, None]) -> bo
     elif isinstance(expected, StrRe):
         if got is None or not re.match(expected.regexp, got):
             return False
+    elif isinstance(expected, NotStrRe):
+        if got is None or re.match(expected.regexp, got):
+            return False
     elif isinstance(expected, Operator):
         raise NotImplementedError(f"Unsupported operator: {expected}")
     elif got != expected:

irctest/self_tests/test_cases.py

@@ -4,7 +4,7 @@ import pytest
 
 from irctest import cases
 from irctest.irc_utils.message_parser import parse_message
-from irctest.patma import ANYDICT, ANYSTR, StrRe
+from irctest.patma import ANYDICT, ANYSTR, AnyOptStr, NotStrRe, RemainingKeys, StrRe
 
 # fmt: off
 MESSAGE_SPECS: List[Tuple[Dict, List[str], List[str]]] = [
@@ -131,6 +131,27 @@ MESSAGE_SPECS: List[Tuple[Dict, List[str], List[str]]] = [
             ":foo!baz@qux PRIVMSG #chan hello",
         ]
     ),
+    (
+        # the specification:
+        dict(
+            tags={"tag1": "bar", RemainingKeys(NotStrRe("tag2")): AnyOptStr()},
+            command="PRIVMSG",
+            params=["#chan", "hello"],
+        ),
+        # matches:
+        [
+            "@tag1=bar PRIVMSG #chan :hello",
+            "@tag1=bar :foo!baz@qux PRIVMSG #chan :hello",
+            "@tag1=bar;tag3= PRIVMSG #chan :hello",
+        ],
+        # and does not match:
+        [
+            "PRIVMG #chan :hello",
+            "@tag1=value1 PRIVMSG #chan :hello",
+            "@tag1=bar;tag2= PRIVMSG #chan :hello",
+            "@tag1=bar;tag2=baz PRIVMSG #chan :hello",
+        ]
+    ),
 ]
 # fmt: on
 

irctest/server_tests/test_labeled_responses.py

@@ -8,7 +8,7 @@ so there may be many false positives.
 import re
 
 from irctest import cases
-from irctest.patma import ANYDICT, StrRe
+from irctest.patma import ANYDICT, AnyOptStr, NotStrRe, RemainingKeys, StrRe
 
 
 class LabeledResponsesTestCase(cases.BaseServerTestCase, cases.OptionalityHelper):
@@ -297,7 +297,11 @@ class LabeledResponsesTestCase(cases.BaseServerTestCase, cases.OptionalityHelper
         self.assertMessageMatch(
             m2,
             command="TAGMSG",
-            tags={"+draft/reply": msgid, "+draft/react": "l😃l", **ANYDICT},
+            tags={
+                "+draft/reply": msgid,
+                "+draft/react": "l😃l",
+                RemainingKeys(NotStrRe("label")): AnyOptStr(),
+            },
         )
         self.assertNotIn(
             "label",
@@ -360,6 +364,11 @@ class LabeledResponsesTestCase(cases.BaseServerTestCase, cases.OptionalityHelper
         self.assertMessageMatch(
             mt,
             command="TAGMSG",
+            tags={
+                "+draft/reply": msgid,
+                "+draft/react": "l😃l",
+                RemainingKeys(NotStrRe("label")): AnyOptStr(),
+            },
             fail_msg="No TAGMSG received by the target after sending one out",
         )
         self.assertNotIn(