Fix case-sensitivity.

Note that the Rust code already handles lower-casing / uses
case-insensitive regular expressions.

synapse/push/bulk_push_rule_evaluator.py

@@ -503,9 +503,7 @@ def _flatten_dict(
  if result is None:
  result = {}
  for key, value in d.items():
- if isinstance(value, str):
- result[".".join(prefix + [key])] = value.lower()
- elif isinstance(value, bool) or type(value) is int or value is None:
+ if isinstance(value, (bool, str)) or type(value) is int or value is None:
  result[".".join(prefix + [key])] = value
  elif isinstance(value, Mapping):
  # do not set `room_version` due to recursion considerations below

tests/push/test_push_rule_evaluator.py

@@ -358,12 +358,11 @@ def test_exact_event_match_string(self) -> None:
  {"value": "foobaz"},
  "exact value should match",
  )
- # TODO?
- # self._assert_not_matches(
- # condition,
- # {"value": "FoobaZ"},
- # "values should match and be case-sensitive",
- # )
+ self._assert_not_matches(
+ condition,
+ {"value": "FoobaZ"},
+ "values should match and be case-sensitive",
+ )
  self._assert_not_matches(
  condition,
  {"value": "test foobaz test"},