Add negative test

Author: sterliakov

test-data/unit/check-typeddict.test

@@ -4297,9 +4297,13 @@ class TD(TypedDict):
     x: int
 
 x: Union[TD, dict[str, str]] = {"x": "foo"}
+y: Union[TD, dict[str, int]] = {"x": "foo"}  # E: Dict entry 0 has incompatible type "str": "str"; expected "str": "int"
 
-def accepts_td(d: Union[TD, dict[str, str]]) -> None: ...
+def ok(d: Union[TD, dict[str, str]]) -> None: ...
+ok({"x": "foo"})
+
+def bad(d: Union[TD, dict[str, int]]) -> None: ...
+bad({"x": "foo"})  # E: Dict entry 0 has incompatible type "str": "str"; expected "str": "int"
 
-accepts_td({"x": "foo"})
 [builtins fixtures/dict.pyi]
 [typing fixtures/typing-typeddict.pyi]