🥅 Raise TypeError on parameter validation error.

Closes #48

Author: rafalkrupinski

src/lapidary/runtime/model/request.py

@@ -165,7 +165,11 @@ class FreeParamsContributor(ParamsContributor):
     model_type: type[pydantic.BaseModel]
 
     def update_builder(self, builder: RequestBuilder, free_params: Mapping[str, typing.Any]) -> None:
-        super().update_builder(builder, self.model_type.model_validate(free_params))
+        try:
+            model = self.model_type.model_validate(free_params)
+        except pydantic.ValidationError as e:
+            raise TypeError from e
+        super().update_builder(builder, model)
 
 
 @dc.dataclass
@@ -227,8 +231,7 @@ def update_builder(self, builder: RequestBuilder, kwargs: dict[str, typing.Any])
                 except KeyError:
                     raise TypeError('Unexpected argument', name)
                 contributor.update_builder(builder, value)
-        if free_params:
-            assert self.free_param_contributor
+        if self.free_param_contributor:
             self.free_param_contributor.update_builder(builder, free_params)
 
     @classmethod

tests/test_request.py

@@ -128,3 +128,18 @@ async def param_list_exploded(
         headers=httpx.Headers(),
         cookies=httpx.Cookies(),
     )
+
+
+@pytest.mark.asyncio
+async def test_missing_required_param(mock_http_client):
+    class Client(ClientTestBase):
+        @get('/param_list_exploded')
+        async def op(
+            self: typing.Self,
+            q_a: typing.Annotated[typing.List[str], Query],
+        ) -> typing.Annotated[Awaitable[None], Responses({})]:
+            pass
+
+    async with Client(client=mock_http_client) as client:
+        with pytest.raises(TypeError):
+            await client.op()