Strict detection of ANY in multi items patterns

respx/patterns.py

@@ -294,19 +294,24 @@ def _multi_items(
             (
                 key,
                 tuple(
-                    (
-                        ANY
-                        if parse_any and v == str(ANY)
-                        else str(ANY)
-                        if encode_any and v == ANY
-                        else v
-                    )
+                    self._item_value(v, parse_any=parse_any, encode_any=encode_any)
                     for v in value.get_list(key)
                 ),
             )
             for key in sorted(value.keys())
         )
 
+    def _item_value(
+        self, value: Any, parse_any: bool = False, encode_any: bool = False
+    ) -> Any:
+        return (
+            ANY
+            if parse_any and value == str(ANY)
+            else str(ANY)
+            if encode_any and value is ANY
+            else value
+        )
+
     def __hash__(self):
         return hash(
             (
@@ -605,6 +610,15 @@ def _normalize_file_value(self, value: FileTypes) -> Tuple[Tuple[Any, Any]]:
 
         return ((filename, fileobj),)
 
+    def _item_value(
+        self, value: Tuple[Any, Any], parse_any: bool = False, encode_any: bool = False
+    ) -> Tuple[Any, Any]:
+        filename, data = value
+        return (
+            super()._item_value(filename, parse_any=parse_any, encode_any=encode_any),
+            super()._item_value(data, parse_any=parse_any, encode_any=encode_any),
+        )
+
     def clean(self, value: RequestFiles) -> MultiItems:
         if isinstance(value, Mapping):
             value = list(value.items())

tests/test_api.py

@@ -501,6 +501,10 @@ def test_pop():
 )
 async def test_params_match(client, url, params, call_url, call_params):
     respx.get(url, params=params) % dict(content="spam spam")
+
+    # Add an extra competing param but with non-matching value, reproduces #311 issue
+    respx.get(url, params={"foo": "<non-matching>"})
+
     response = await client.get(call_url, params=call_params)
     assert response.text == "spam spam"