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#![cfg(feature = "macros")]
use pyo3::prelude::*;
#[pyclass(subclass)]
struct Base {
num: u32,
}
#[pymethods]
impl Base {
#[new]
fn new() -> Self {
Self { num: 0 }
}
fn __init__(&mut self) {
self.num += 42
}
}
#[test]
fn test_base_init() {
Python::attach(|py| {
let typeobj = py.get_type::<Base>();
let obj = typeobj.call((), None).unwrap().cast_into::<Base>().unwrap();
// check __init__ was called
assert_eq!(obj.borrow().num, 42);
});
}
#[pyclass(extends=Base)]
struct SubWithoutInit;
#[pymethods]
impl SubWithoutInit {
#[new]
fn new() -> (Self, Base) {
(Self, Base::new())
}
}
#[test]
fn test_subclass_without_init_calls_base_init() {
Python::attach(|py| {
let typeobj = py.get_type::<SubWithoutInit>();
let obj = typeobj
.call((), None)
.unwrap()
.cast_into::<SubWithoutInit>()
.unwrap();
// check Base.__init__ was called
assert_eq!(obj.as_super().borrow().num, 42);
});
}
#[pyclass(extends=Base)]
struct SubWithInit;
#[pymethods]
impl SubWithInit {
#[new]
fn new() -> (Self, Base) {
(Self, Base::new())
}
fn __init__(mut slf: pyo3::PyClassGuardMut<'_, Self>) {
slf.as_super().__init__(); // need to call super __init__ manually
slf.as_super().num += 1;
}
}
#[test]
fn test_subclass_with_init() {
Python::attach(|py| {
let typeobj = py.get_type::<SubWithInit>();
let obj = typeobj
.call((), None)
.unwrap()
.cast_into::<SubWithInit>()
.unwrap();
// check SubWithInit.__init__ was called, and Base.__init__ was only called once (through
// SubWithInit.__init__)
assert_eq!(obj.as_super().borrow().num, 43);
});
}
|
