Added test for recursive type

tests/test_decoding.py

@@ -54,6 +54,12 @@ class GenericJson(Generic[T1, T2]):
     t2: T2
 
 
+@dataclass(frozen=True)
+class RecursiveJson:
+    data: str
+    more: Optional["RecursiveJson"]
+
+
 def test_can_decode_str() -> None:
     json = "string"
     assert typedjson.decode(str, json) == json
@@ -214,6 +220,17 @@ def test_can_decode_union() -> None:
     )
 
 
+def test_can_decode_recursive() -> None:
+    json_recursive = {"data": "foo", "more": {"data": "bar", "more": {"data": "baz"}}}
+
+    expectation = RecursiveJson(
+        data="foo",
+        more=RecursiveJson(data="bar", more=RecursiveJson(data="baz", more=None)),
+    )
+
+    assert typedjson.decode(RecursiveJson, json_recursive) == expectation
+
+
 def test_cannot_decode_with_wrong_type() -> None:
     json = True
     assert typedjson.decode(str, json) == DecodingError(TypeMismatch(()))