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use std::collections::BTreeMap;
use pyo3::{
prelude::*,
types::{PyDict, PyList},
Py, PyAny, Python,
};
use pythonize::PythonizeTypes;
use serde::{Deserialize, Serialize};
#[derive(Serialize, Deserialize, Debug, PartialEq, Eq)]
struct Root<T> {
root_key: String,
root_map: BTreeMap<String, Nested<T>>,
}
impl<T> PythonizeTypes for Root<T> {
type Map = PyDict;
type List = PyList;
}
#[derive(Serialize, Deserialize, Debug, PartialEq, Eq)]
struct Nested<T> {
nested_key: T,
}
#[derive(Deserialize, Debug, PartialEq, Eq)]
struct CannotSerialize {}
impl Serialize for CannotSerialize {
fn serialize<S>(&self, _serializer: S) -> Result<S::Ok, S::Error>
where
S: serde::Serializer,
{
Err(serde::ser::Error::custom(
"something went intentionally wrong",
))
}
}
#[test]
fn test_de_valid() {
Python::with_gil(|py| {
let pyroot = PyDict::new_bound(py);
pyroot.set_item("root_key", "root_value").unwrap();
let nested = PyDict::new_bound(py);
let nested_0 = PyDict::new_bound(py);
nested_0.set_item("nested_key", "nested_value_0").unwrap();
nested.set_item("nested_0", nested_0).unwrap();
let nested_1 = PyDict::new_bound(py);
nested_1.set_item("nested_key", "nested_value_1").unwrap();
nested.set_item("nested_1", nested_1).unwrap();
pyroot.set_item("root_map", nested).unwrap();
let de = &mut pythonize::Depythonizer::from_object_bound(pyroot.into_any());
let root: Root<String> = serde_path_to_error::deserialize(de).unwrap();
assert_eq!(
root,
Root {
root_key: String::from("root_value"),
root_map: BTreeMap::from([
(
String::from("nested_0"),
Nested {
nested_key: String::from("nested_value_0")
}
),
(
String::from("nested_1"),
Nested {
nested_key: String::from("nested_value_1")
}
)
])
}
);
})
}
#[test]
fn test_de_invalid() {
Python::with_gil(|py| {
let pyroot = PyDict::new_bound(py);
pyroot.set_item("root_key", "root_value").unwrap();
let nested = PyDict::new_bound(py);
let nested_0 = PyDict::new_bound(py);
nested_0.set_item("nested_key", "nested_value_0").unwrap();
nested.set_item("nested_0", nested_0).unwrap();
let nested_1 = PyDict::new_bound(py);
nested_1.set_item("nested_key", 1).unwrap();
nested.set_item("nested_1", nested_1).unwrap();
pyroot.set_item("root_map", nested).unwrap();
let de = &mut pythonize::Depythonizer::from_object_bound(pyroot.into_any());
let err = serde_path_to_error::deserialize::<_, Root<String>>(de).unwrap_err();
assert_eq!(err.path().to_string(), "root_map.nested_1.nested_key");
assert_eq!(err.to_string(), "root_map.nested_1.nested_key: unexpected type: 'int' object cannot be converted to 'PyString'");
})
}
#[test]
fn test_ser_valid() {
Python::with_gil(|py| {
let root = Root {
root_key: String::from("root_value"),
root_map: BTreeMap::from([
(
String::from("nested_0"),
Nested {
nested_key: String::from("nested_value_0"),
},
),
(
String::from("nested_1"),
Nested {
nested_key: String::from("nested_value_1"),
},
),
]),
};
let ser = pythonize::Pythonizer::<Root<String>>::from(py);
let pyroot: Py<PyAny> = serde_path_to_error::serialize(&root, ser).unwrap();
let pyroot = pyroot.bind(py).downcast::<PyDict>().unwrap();
assert_eq!(pyroot.len(), 2);
let root_value: String = pyroot
.get_item("root_key")
.unwrap()
.unwrap()
.extract()
.unwrap();
assert_eq!(root_value, "root_value");
let root_map = pyroot
.get_item("root_map")
.unwrap()
.unwrap()
.downcast_into::<PyDict>()
.unwrap();
assert_eq!(root_map.len(), 2);
let nested_0 = root_map
.get_item("nested_0")
.unwrap()
.unwrap()
.downcast_into::<PyDict>()
.unwrap();
assert_eq!(nested_0.len(), 1);
let nested_key_0: String = nested_0
.get_item("nested_key")
.unwrap()
.unwrap()
.extract()
.unwrap();
assert_eq!(nested_key_0, "nested_value_0");
let nested_1 = root_map
.get_item("nested_1")
.unwrap()
.unwrap()
.downcast_into::<PyDict>()
.unwrap();
assert_eq!(nested_1.len(), 1);
let nested_key_1: String = nested_1
.get_item("nested_key")
.unwrap()
.unwrap()
.extract()
.unwrap();
assert_eq!(nested_key_1, "nested_value_1");
});
}
#[test]
fn test_ser_invalid() {
Python::with_gil(|py| {
let root = Root {
root_key: String::from("root_value"),
root_map: BTreeMap::from([
(
String::from("nested_0"),
Nested {
nested_key: CannotSerialize {},
},
),
(
String::from("nested_1"),
Nested {
nested_key: CannotSerialize {},
},
),
]),
};
let ser = pythonize::Pythonizer::<Root<String>>::from(py);
let err = serde_path_to_error::serialize(&root, ser).unwrap_err();
assert_eq!(err.path().to_string(), "root_map.nested_0.nested_key");
});
}
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