Changed ValueError to NotFound exceptions in content getters. Updated…

… tests.

Signed-off-by: javier.hernandez <javier.hernandez@meaningfuldata.eu>

src/pysdmx/model/message.py

@@ -11,7 +11,7 @@
 
 from msgspec import Struct
 
-from pysdmx.errors import ClientError
+from pysdmx.errors import ClientError, NotFound
 from pysdmx.model import Codelist, ConceptScheme
 from pysdmx.model.__base import ItemScheme
 
@@ -87,17 +87,29 @@ def __get_elements(self, type_: str) -> Dict[str, Any]:
         """Returns the elements from content."""
         if type_ in self.content:
             return self.content[type_]
-        raise ValueError(f"No {type_} found in content")
+        raise NotFound(
+            404,
+            f"No {type_} found in content",
+            f"Could not find any {type_} in content.",
+        )
 
     def __get_element_by_uid(self, type_: str, unique_id: str) -> Any:
         """Returns a specific element from content."""
         if type_ not in self.content:
-            raise ValueError(f"No {type_} found")
+            raise NotFound(
+                404,
+                f"No {type_} found.",
+                f"Could not find any {type_} in content.",
+            )
 
         if unique_id in self.content[type_]:
             return self.content[type_][unique_id]
 
-        raise ValueError(f"No {type_} with id {unique_id} found in content")
+        raise NotFound(
+            404,
+            f"No {type_} with id {unique_id} found in content",
+            "Could not find the requested element.",
+        )
 
     def get_organisation_schemes(self) -> Dict[str, ItemScheme]:
         """Returns the OrganisationScheme."""

tests/model/test_message.py

@@ -1,6 +1,6 @@
 import pytest
 
-from pysdmx.errors import ClientError
+from pysdmx.errors import ClientError, NotFound
 from pysdmx.model import Codelist, ConceptScheme
 from pysdmx.model.__base import ItemScheme
 from pysdmx.model.message import Message
@@ -61,35 +61,48 @@ def test_get_concepts():
 
 def test_empty_get_elements():
     message = Message({})
-    with pytest.raises(ValueError, match="No OrganisationSchemes found"):
+    with pytest.raises(NotFound) as exc_info:
         message.get_organisation_schemes()
 
-    with pytest.raises(ValueError, match="No Codelists found"):
+    assert "No OrganisationSchemes found" in str(exc_info.value.title)
+
+    with pytest.raises(NotFound) as exc_info:
         message.get_codelists()
 
-    with pytest.raises(ValueError, match="No ConceptSchemes found"):
+    assert "No Codelists found" in str(exc_info.value.title)
+
+    with pytest.raises(NotFound) as exc_info:
         message.get_concept_schemes()
 
+    assert "No ConceptSchemes found" in str(exc_info.value.title)
+
 
 def test_empty_get_element_by_uid():
     message = Message({})
-    with pytest.raises(ValueError, match="No OrganisationSchemes found"):
+    with pytest.raises(NotFound) as exc_info:
         message.get_organisation_scheme_by_uid("org1:orgs1(1.0)")
 
-    with pytest.raises(ValueError, match="No Codelists found"):
+    assert "No OrganisationSchemes found" in str(exc_info.value.title)
+
+    with pytest.raises(NotFound) as exc_info:
         message.get_codelist_by_uid("cl1:cl1(1.0)")
 
-    with pytest.raises(ValueError, match="No ConceptSchemes found"):
+    assert "No Codelists found" in str(exc_info.value.title)
+
+    with pytest.raises(NotFound) as exc_info:
         message.get_concept_scheme_by_uid("cs1:cs1(1.0)")
 
+    assert "No ConceptSchemes found" in str(exc_info.value.title)
+
 
 def test_invalid_get_element_by_uid():
     message = Message({"OrganisationSchemes": {}})
 
     e_m = "No OrganisationSchemes with id"
 
-    with pytest.raises(ValueError, match=e_m):
+    with pytest.raises(NotFound) as exc_info:
         message.get_organisation_scheme_by_uid("org12:orgs1(1.0)")
+    assert e_m in str(exc_info.value.title)
 
 
 def test_invalid_initialization_content_key():