Add some additional narrowing test cases (#20598)

Requested in
#20492 (comment)

Regression for the Never's in
#18524 (comment)

Author: hauntsaninja

test-data/unit/check-narrowing.test

@@ -2742,6 +2742,7 @@ def foo(x: dict[str, Any]) -> bool:
 
 
 [case testNarrowingTypeObjects]
+# flags: --warn-unreachable
 from __future__ import annotations
 from typing import Callable, Any, TypeVar, Generic, Protocol
 _T_co = TypeVar('_T_co', covariant=True)
@@ -2768,7 +2769,10 @@ def main(key: str):
     existing_value_type = get_type(key)
     if existing_value_type is TupleLike:
         reveal_type(TupleLike)  # N: Revealed type is "def [_T_co] (__main__.Boxxy[_T_co`1]) -> __main__.TupleLike[_T_co`1]"
-        TupleLike(Box2("str"))
+        reveal_type(TupleLike(Box2("str")))  # N: Revealed type is "__main__.TupleLike[builtins.str]"
+
+        reveal_type(existing_value_type)  # N: Revealed type is "(def [_T_co] (__main__.Boxxy[_T_co`1]) -> __main__.TupleLike[_T_co`1]) | type[Any]"
+        reveal_type(existing_value_type(Box2("str")))  # N: Revealed type is "__main__.TupleLike[builtins.str] | Any"
 [builtins fixtures/tuple.pyi]
 
 [case testNarrowingCollections]

test-data/unit/check-python310.test

@@ -2939,10 +2939,13 @@ def switch(choice: type[T_Choice]) -> None:
     match choice:
         case b.One:
             reveal_type(choice)  # N: Revealed type is "def () -> b.One"
+            reveal_type(choice())  # N: Revealed type is "b.One"
         case b.Two:
             reveal_type(choice)  # N: Revealed type is "def () -> b.Two"
+            reveal_type(choice())  # N: Revealed type is "b.Two"
         case _:
             reveal_type(choice)  # N: Revealed type is "type[T_Choice`-1]"
+            reveal_type(choice())  # N: Revealed type is "b.One | b.Two"
 
 [file b.py]
 class One: ...
@@ -3235,3 +3238,76 @@ match config:
     case {"a": 1, **rest}:  # E: Incompatible types in capture pattern (pattern captures type "dict[str, object]", variable has type "list[int]")
         ...
 [builtins fixtures/dict.pyi]
+
+[case testMatchTypeNarrowing]
+# flags: --warn-unreachable
+import builtins
+import typing
+import types
+
+def type_bare(field_type: type) -> str:
+    match field_type:
+        case builtins.int:
+            reveal_type(field_type)  # N: Revealed type is "def () -> builtins.int"
+            ret = "foo"
+        case builtins.str:
+            reveal_type(field_type)  # N: Revealed type is "def () -> builtins.str"
+            ret = "foo"
+        case builtins.bytes:
+            reveal_type(field_type)  # N: Revealed type is "def () -> builtins.bytes"
+            ret = "foo"
+        case builtins.bool:
+            reveal_type(field_type)  # N: Revealed type is "def () -> builtins.bool"
+            ret = "foo"
+        case types.NoneType:
+            reveal_type(field_type)  # N: Revealed type is "type[None]"
+            ret = "foo"
+        case _:
+            reveal_type(field_type)  # N: Revealed type is "builtins.type"
+            return "bar"
+    return ret
+
+def type_any(field_type: type[typing.Any]) -> str:
+    match field_type:
+        case builtins.int:
+            reveal_type(field_type)  # N: Revealed type is "type[Any]"
+            ret = "foo"
+        case builtins.str:
+            reveal_type(field_type)  # N: Revealed type is "type[Any]"
+            ret = "foo"
+        case builtins.bytes:
+            reveal_type(field_type)  # N: Revealed type is "type[Any]"
+            ret = "foo"
+        case builtins.bool:
+            reveal_type(field_type)  # N: Revealed type is "type[Any]"
+            ret = "foo"
+        case types.NoneType:
+            reveal_type(field_type)  # N: Revealed type is "type[None]"
+            ret = "foo"
+        case _:
+            reveal_type(field_type)  # N: Revealed type is "type[Any]"
+            return "bar"
+    return ret
+
+def type_object(field_type: type[object]) -> str:
+    match field_type:
+        case builtins.int:
+            reveal_type(field_type)  # N: Revealed type is "def () -> builtins.int"
+            ret = "foo"
+        case builtins.str:
+            reveal_type(field_type)  # N: Revealed type is "def () -> builtins.str"
+            ret = "foo"
+        case builtins.bytes:
+            reveal_type(field_type)  # N: Revealed type is "def () -> builtins.bytes"
+            ret = "foo"
+        case builtins.bool:
+            reveal_type(field_type)  # N: Revealed type is "def () -> builtins.bool"
+            ret = "foo"
+        case types.NoneType:
+            reveal_type(field_type)  # N: Revealed type is "type[None]"
+            ret = "foo"
+        case _:
+            reveal_type(field_type)  # N: Revealed type is "type[builtins.object]"
+            return "bar"
+    return ret
+[builtins fixtures/dict.pyi]