pyo3/tests/test_various.rs

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use pyo3::prelude::*;
use pyo3::type_object::initialize_type;
use pyo3::types::IntoPyDict;
use pyo3::types::{PyDict, PyTuple};
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use pyo3::{py_run, wrap_pyfunction};
use std::isize;
mod common;
#[pyclass]
struct MutRefArg {
n: i32,
}
#[pymethods]
impl MutRefArg {
fn get(&self) -> PyResult<i32> {
Ok(self.n)
}
fn set_other(&self, other: &mut MutRefArg) -> PyResult<()> {
other.n = 100;
Ok(())
}
}
#[test]
fn mut_ref_arg() {
let gil = Python::acquire_gil();
let py = gil.python();
let inst1 = Py::new(py, MutRefArg { n: 0 }).unwrap();
let inst2 = Py::new(py, MutRefArg { n: 0 }).unwrap();
let d = [("inst1", &inst1), ("inst2", &inst2)].into_py_dict(py);
py.run("inst1.set_other(inst2)", None, Some(d)).unwrap();
assert_eq!(inst2.as_ref(py).n, 100);
}
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#[pyclass]
struct PyUsize {
#[pyo3(get)]
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pub value: usize,
}
#[pyfunction]
fn get_zero() -> PyResult<PyUsize> {
Ok(PyUsize { value: 0 })
}
#[test]
/// Checks that we can use return a custom class in arbitrary function and use those functions
/// both in rust and python
fn return_custom_class() {
let gil = Python::acquire_gil();
let py = gil.python();
// Using from rust
assert_eq!(get_zero().unwrap().value, 0);
// Using from python
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let get_zero = wrap_pyfunction!(get_zero)(py);
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py_assert!(py, get_zero, "get_zero().value == 0");
}
#[test]
fn intopytuple_primitive() {
let gil = Python::acquire_gil();
let py = gil.python();
let tup = (1, 2, "foo");
py_assert!(py, tup, "tup == (1, 2, 'foo')");
py_assert!(py, tup, "tup[0] == 1");
py_assert!(py, tup, "tup[1] == 2");
py_assert!(py, tup, "tup[2] == 'foo'");
}
#[pyclass]
struct SimplePyClass {}
#[test]
fn intopytuple_pyclass() {
let gil = Python::acquire_gil();
let py = gil.python();
let tup = (
PyRef::new(py, SimplePyClass {}).unwrap(),
PyRef::new(py, SimplePyClass {}).unwrap(),
);
py_assert!(py, tup, "type(tup[0]).__name__ == 'SimplePyClass'");
py_assert!(py, tup, "type(tup[0]).__name__ == type(tup[1]).__name__");
py_assert!(py, tup, "tup[0] != tup[1]");
}
#[test]
fn pytuple_primitive_iter() {
let gil = Python::acquire_gil();
let py = gil.python();
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let tup = PyTuple::new(py, [1u32, 2, 3].iter());
py_assert!(py, tup, "tup == (1, 2, 3)");
}
#[test]
fn pytuple_pyclass_iter() {
let gil = Python::acquire_gil();
let py = gil.python();
let tup = PyTuple::new(
py,
[
PyRef::new(py, SimplePyClass {}).unwrap(),
PyRef::new(py, SimplePyClass {}).unwrap(),
]
.iter(),
);
py_assert!(py, tup, "type(tup[0]).__name__ == 'SimplePyClass'");
py_assert!(py, tup, "type(tup[0]).__name__ == type(tup[0]).__name__");
py_assert!(py, tup, "tup[0] != tup[1]");
}
#[pyclass(dict)]
struct PickleSupport {}
#[pymethods]
impl PickleSupport {
#[new]
fn new(obj: &PyRawObject) {
obj.init({ PickleSupport {} });
}
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pub fn __reduce__<'py>(
slf: PyRef<Self>,
py: Python<'py>,
) -> PyResult<(PyObject, &'py PyTuple, PyObject)> {
let cls = slf.to_object(py).getattr(py, "__class__")?;
let dict = slf.to_object(py).getattr(py, "__dict__")?;
Ok((cls, PyTuple::empty(py), dict))
}
}
fn add_module(py: Python, module: &PyModule) -> PyResult<()> {
py.import("sys")?
.dict()
.get_item("modules")
.unwrap()
.downcast_mut::<PyDict>()?
.set_item(module.name()?, module)
}
#[test]
fn test_pickle() {
let gil = Python::acquire_gil();
let py = gil.python();
let module = PyModule::new(py, "test_module").unwrap();
module.add_class::<PickleSupport>().unwrap();
add_module(py, module).unwrap();
initialize_type::<PickleSupport>(py, Some("test_module")).unwrap();
let inst = PyRef::new(py, PickleSupport {}).unwrap();
py_run!(
py,
inst,
r#"
inst.a = 1
assert inst.__dict__ == {'a': 1}
import pickle
inst2 = pickle.loads(pickle.dumps(inst))
assert inst2.__dict__ == {'a': 1}
"#
);
}
#[test]
fn incorrect_iter() {
let gil = Python::acquire_gil();
let py = gil.python();
let int = 13isize.to_object(py);
let int_ref = int.as_ref(py);
// Should not segfault.
assert!(int_ref.iter().is_err());
}