123 lines
3.1 KiB
Rust
123 lines
3.1 KiB
Rust
//! Test slf: PyRef/PyMutRef<Self>(especially, slf.into::<Py>) works
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use pyo3;
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use pyo3::prelude::*;
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use pyo3::types::{PyBytes, PyString};
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use pyo3::{AsPyRef, PyCell, PyIterProtocol};
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use std::collections::HashMap;
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mod common;
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/// Assumes it's a file reader or so.
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/// Inspired by https://github.com/jothan/cordoba, thanks.
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#[pyclass]
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#[derive(Clone, Debug)]
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struct Reader {
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inner: HashMap<u8, String>,
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}
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#[pymethods]
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impl Reader {
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fn clone_ref(slf: &PyCell<Self>) -> &PyCell<Self> {
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slf
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}
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fn clone_ref_with_py<'py>(slf: &'py PyCell<Self>, _py: Python<'py>) -> &'py PyCell<Self> {
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slf
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}
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fn get_iter(slf: &PyCell<Self>, keys: Py<PyBytes>) -> PyResult<Iter> {
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Ok(Iter {
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reader: slf.into(),
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keys,
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idx: 0,
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})
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}
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fn get_iter_and_reset(
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mut slf: PyRefMut<Self>,
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keys: Py<PyBytes>,
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py: Python,
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) -> PyResult<Iter> {
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let reader = Py::new(py, slf.clone())?;
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slf.inner.clear();
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Ok(Iter {
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reader,
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keys,
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idx: 0,
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})
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}
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}
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#[pyclass]
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#[derive(Debug)]
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struct Iter {
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reader: Py<Reader>,
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keys: Py<PyBytes>,
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idx: usize,
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}
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#[pyproto]
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impl PyIterProtocol for Iter {
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fn __iter__(slf: PyRefMut<Self>) -> PyResult<PyObject> {
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let py = unsafe { Python::assume_gil_acquired() };
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Ok(slf.into_py(py))
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}
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fn __next__(mut slf: PyRefMut<Self>) -> PyResult<Option<PyObject>> {
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let py = unsafe { Python::assume_gil_acquired() };
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let bytes = slf.keys.as_ref(py).as_bytes();
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match bytes.get(slf.idx) {
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Some(&b) => {
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slf.idx += 1;
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let reader = slf.reader.as_ref(py);
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let reader_ref = reader.try_borrow()?;
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let res = reader_ref
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.inner
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.get(&b)
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.map(|s| PyString::new(py, s).into());
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Ok(res)
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}
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None => Ok(None),
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}
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}
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}
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fn reader() -> Reader {
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let reader = [(1, "a"), (2, "b"), (3, "c"), (4, "d"), (5, "e")];
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Reader {
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inner: reader.iter().map(|(k, v)| (*k, (*v).to_string())).collect(),
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}
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}
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#[test]
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fn test_nested_iter() {
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let gil = Python::acquire_gil();
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let py = gil.python();
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let reader: PyObject = reader().into_py(py);
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py_assert!(
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py,
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reader,
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"list(reader.get_iter(bytes([3, 5, 2]))) == ['c', 'e', 'b']"
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);
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}
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#[test]
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fn test_clone_ref() {
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let gil = Python::acquire_gil();
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let py = gil.python();
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let reader: PyObject = reader().into_py(py);
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py_assert!(py, reader, "reader == reader.clone_ref()");
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py_assert!(py, reader, "reader == reader.clone_ref_with_py()");
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}
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#[test]
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fn test_nested_iter_reset() {
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let gil = Python::acquire_gil();
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let py = gil.python();
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let reader = PyCell::new(py, reader()).unwrap();
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py_assert!(
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py,
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reader,
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"list(reader.get_iter_and_reset(bytes([3, 5, 2]))) == ['c', 'e', 'b']"
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);
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let reader_ref = reader.borrow();
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assert!(reader_ref.inner.is_empty());
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}
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