Unit test for annotated decimal type

tests/test_logicals.py

@@ -10,8 +10,9 @@
 # specific language governing permissions and limitations under the License.
 
 import datetime
+import decimal
 import uuid
-from typing import Any, Dict, List
+from typing import Annotated, Any, Dict, List
 
 import py_avro_schema as pas
 from py_avro_schema._testing import assert_schema
@@ -76,6 +77,7 @@ def test_timedelta():
 
 
 def test_decimal():
+    # Deprecated custom type hint for decimals
     py_type = pas.DecimalType[5, 2]
     expected = {
         "type": "bytes",
@@ -86,6 +88,17 @@ def test_decimal():
     assert_schema(py_type, expected)
 
 
+def test_annotated_decimal():
+    py_type = Annotated[decimal.Decimal, (5, 2)]
+    expected = {
+        "type": "bytes",
+        "logicalType": "decimal",
+        "precision": 5,
+        "scale": 2,
+    }
+    assert_schema(py_type, expected)
+
+
 def test_multiple_decimals():
     # Test the magic with _GenericAlias!
     py_type_1 = pas.DecimalType[5, 2]