feat: implement Schema.get_attribute

doc/changelog.rst

@@ -1,6 +1,12 @@
 Changelog
 =========
 
+[0.2.11] - Unreleased
+---------------------
+Added
+^^^^^
+- Implement :meth:`Schema.get_attribute <scim2_models.Schema.get_attribute>`.
+
 [0.2.10] - 2024-12-02
 ---------------------
 

scim2_models/rfc7643/schema.py

@@ -266,3 +266,10 @@ class Schema(Resource):
     def urn_id(cls, value: str) -> str:
         """Ensure that schema ids are URI, as defined in RFC7643 §7."""
         return str(Url(value))
+
+    def get_attribute(self, attribute_name: str) -> Optional[Attribute]:
+        """Find an attribute by its name."""
+        for attribute in self.attributes or []:
+            if attribute.name == attribute_name:
+                return attribute
+        return None

tests/test_schema.py

@@ -85,3 +85,11 @@ def test_uri_ids():
     Schema(id="urn:ietf:params:scim:schemas:extension:enterprise:2.0:User")
     with pytest.raises(ValidationError):
         Schema(id="invalid\nuri")
+
+
+def test_get_attribute(load_sample):
+    """Test the Schema.get_attribute method."""
+    payload = load_sample("rfc7643-8.7.1-schema-user.json")
+    schema = Schema.model_validate(payload)
+    assert schema.get_attribute("invalid") is None
+    assert isinstance(schema.get_attribute("userName"), Attribute)