pyo3/tests/test_dunder.rs

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#![feature(specialization)]
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use pyo3::class::{
PyContextProtocol, PyIterProtocol, PyMappingProtocol, PyObjectProtocol, PySequenceProtocol,
};
use pyo3::exceptions::{IndexError, ValueError};
use pyo3::ffi;
use pyo3::prelude::*;
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use pyo3::types::{IntoPyDict, PyAny, PyBytes, PySlice, PyType};
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use pyo3::AsPyPointer;
use std::{isize, iter};
#[macro_use]
mod common;
#[pyclass]
pub struct Len {
l: usize,
}
#[pyproto]
impl PyMappingProtocol for Len {
fn __len__(&self) -> PyResult<usize> {
Ok(self.l)
}
}
#[test]
fn len() {
let gil = Python::acquire_gil();
let py = gil.python();
let inst = Py::new(py, Len { l: 10 }).unwrap();
py_assert!(py, inst, "len(inst) == 10");
unsafe {
assert_eq!(ffi::PyObject_Size(inst.as_ptr()), 10);
assert_eq!(ffi::PyMapping_Size(inst.as_ptr()), 10);
}
let inst = Py::new(
py,
Len {
l: (isize::MAX as usize) + 1,
},
)
.unwrap();
py_expect_exception!(py, inst, "len(inst)", OverflowError);
}
#[pyclass]
struct Iterator {
iter: Box<iter::Iterator<Item = i32> + Send>,
}
#[pyproto]
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impl<'p> PyIterProtocol for Iterator {
fn __iter__(slf: PyRefMut<Self>) -> PyResult<Py<Iterator>> {
Ok(slf.into())
}
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fn __next__(mut slf: PyRefMut<Self>) -> PyResult<Option<i32>> {
Ok(slf.iter.next())
}
}
#[test]
fn iterator() {
let gil = Python::acquire_gil();
let py = gil.python();
let inst = Py::new(
py,
Iterator {
iter: Box::new(5..8),
},
)
.unwrap();
py_assert!(py, inst, "iter(inst) is inst");
py_assert!(py, inst, "list(inst) == [5, 6, 7]");
}
#[pyclass]
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struct StringMethods {}
#[pyproto]
impl<'p> PyObjectProtocol<'p> for StringMethods {
fn __str__(&self) -> PyResult<&'static str> {
Ok("str")
}
fn __repr__(&self) -> PyResult<&'static str> {
Ok("repr")
}
fn __format__(&self, format_spec: String) -> PyResult<String> {
Ok(format!("format({})", format_spec))
}
fn __bytes__(&self) -> PyResult<PyObject> {
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let gil = GILGuard::acquire();
Ok(PyBytes::new(gil.python(), b"bytes").into())
}
}
#[test]
fn string_methods() {
let gil = Python::acquire_gil();
let py = gil.python();
let obj = Py::new(py, StringMethods {}).unwrap();
py_assert!(py, obj, "str(obj) == 'str'");
py_assert!(py, obj, "repr(obj) == 'repr'");
py_assert!(py, obj, "'{0:x}'.format(obj) == 'format(x)'");
py_assert!(py, obj, "bytes(obj) == b'bytes'");
}
#[pyclass]
struct Comparisons {
val: i32,
}
#[pyproto]
impl PyObjectProtocol for Comparisons {
fn __hash__(&self) -> PyResult<isize> {
Ok(self.val as isize)
}
fn __bool__(&self) -> PyResult<bool> {
Ok(self.val != 0)
}
}
#[test]
fn comparisons() {
let gil = Python::acquire_gil();
let py = gil.python();
let zero = Py::new(py, Comparisons { val: 0 }).unwrap();
let one = Py::new(py, Comparisons { val: 1 }).unwrap();
let ten = Py::new(py, Comparisons { val: 10 }).unwrap();
let minus_one = Py::new(py, Comparisons { val: -1 }).unwrap();
py_assert!(py, one, "hash(one) == 1");
py_assert!(py, ten, "hash(ten) == 10");
py_assert!(py, minus_one, "hash(minus_one) == -2");
py_assert!(py, one, "bool(one) is True");
py_assert!(py, zero, "not zero");
}
#[pyclass]
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struct Sequence {}
#[pyproto]
impl PySequenceProtocol for Sequence {
fn __len__(&self) -> PyResult<usize> {
Ok(5)
}
fn __getitem__(&self, key: isize) -> PyResult<isize> {
if key == 5 {
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return Err(PyErr::new::<IndexError, _>(()));
}
Ok(key)
}
}
#[test]
fn sequence() {
let gil = Python::acquire_gil();
let py = gil.python();
let c = Py::new(py, Sequence {}).unwrap();
py_assert!(py, c, "list(c) == [0, 1, 2, 3, 4]");
py_expect_exception!(py, c, "c['abc']", TypeError);
}
#[pyclass]
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struct Callable {}
#[pymethods]
impl Callable {
#[__call__]
fn __call__(&self, arg: i32) -> PyResult<i32> {
Ok(arg * 6)
}
}
#[test]
fn callable() {
let gil = Python::acquire_gil();
let py = gil.python();
let c = Py::new(py, Callable {}).unwrap();
py_assert!(py, c, "callable(c)");
py_assert!(py, c, "c(7) == 42");
let nc = Py::new(py, Comparisons { val: 0 }).unwrap();
py_assert!(py, nc, "not callable(nc)");
}
#[pyclass]
struct SetItem {
key: i32,
val: i32,
}
#[pyproto]
impl PyMappingProtocol<'a> for SetItem {
fn __setitem__(&mut self, key: i32, val: i32) -> PyResult<()> {
self.key = key;
self.val = val;
Ok(())
}
}
#[test]
fn setitem() {
let gil = Python::acquire_gil();
let py = gil.python();
let c = PyRef::new(py, SetItem { key: 0, val: 0 }).unwrap();
py_run!(py, c, "c[1] = 2");
assert_eq!(c.key, 1);
assert_eq!(c.val, 2);
py_expect_exception!(py, c, "del c[1]", NotImplementedError);
}
#[pyclass]
struct DelItem {
key: i32,
}
#[pyproto]
impl PyMappingProtocol<'a> for DelItem {
fn __delitem__(&mut self, key: i32) -> PyResult<()> {
self.key = key;
Ok(())
}
}
#[test]
fn delitem() {
let gil = Python::acquire_gil();
let py = gil.python();
let c = PyRef::new(py, DelItem { key: 0 }).unwrap();
py_run!(py, c, "del c[1]");
assert_eq!(c.key, 1);
py_expect_exception!(py, c, "c[1] = 2", NotImplementedError);
}
#[pyclass]
struct SetDelItem {
val: Option<i32>,
}
#[pyproto]
impl PyMappingProtocol for SetDelItem {
fn __setitem__(&mut self, _key: i32, val: i32) -> PyResult<()> {
self.val = Some(val);
Ok(())
}
fn __delitem__(&mut self, _key: i32) -> PyResult<()> {
self.val = None;
Ok(())
}
}
#[test]
fn setdelitem() {
let gil = Python::acquire_gil();
let py = gil.python();
let c = PyRef::new(py, SetDelItem { val: None }).unwrap();
py_run!(py, c, "c[1] = 2");
assert_eq!(c.val, Some(2));
py_run!(py, c, "del c[1]");
assert_eq!(c.val, None);
}
#[pyclass]
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struct Reversed {}
#[pyproto]
impl PyMappingProtocol for Reversed {
fn __reversed__(&self) -> PyResult<&'static str> {
Ok("I am reversed")
}
}
#[test]
fn reversed() {
let gil = Python::acquire_gil();
let py = gil.python();
let c = Py::new(py, Reversed {}).unwrap();
py_run!(py, c, "assert reversed(c) == 'I am reversed'");
}
#[pyclass]
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struct Contains {}
#[pyproto]
impl PySequenceProtocol for Contains {
fn __contains__(&self, item: i32) -> PyResult<bool> {
Ok(item >= 0)
}
}
#[test]
fn contains() {
let gil = Python::acquire_gil();
let py = gil.python();
let c = Py::new(py, Contains {}).unwrap();
py_run!(py, c, "assert 1 in c");
py_run!(py, c, "assert -1 not in c");
py_expect_exception!(py, c, "assert 'wrong type' not in c", TypeError);
}
#[pyclass]
struct ContextManager {
exit_called: bool,
}
#[pyproto]
impl<'p> PyContextProtocol<'p> for ContextManager {
fn __enter__(&mut self) -> PyResult<i32> {
Ok(42)
}
fn __exit__(
&mut self,
ty: Option<&'p PyType>,
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_value: Option<&'p PyAny>,
_traceback: Option<&'p PyAny>,
) -> PyResult<bool> {
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let gil = GILGuard::acquire();
self.exit_called = true;
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if ty == Some(gil.python().get_type::<ValueError>()) {
Ok(true)
} else {
Ok(false)
}
}
}
#[test]
fn context_manager() {
let gil = Python::acquire_gil();
let py = gil.python();
let mut c = PyRefMut::new(py, ContextManager { exit_called: false }).unwrap();
py_run!(py, c, "with c as x: assert x == 42");
assert!(c.exit_called);
c.exit_called = false;
py_run!(py, c, "with c as x: raise ValueError");
assert!(c.exit_called);
c.exit_called = false;
py_expect_exception!(
py,
c,
"with c as x: raise NotImplementedError",
NotImplementedError
);
assert!(c.exit_called);
}
#[test]
fn test_basics() {
let gil = Python::acquire_gil();
let py = gil.python();
let v = PySlice::new(py, 1, 10, 2);
let indices = v.indices(100).unwrap();
assert_eq!(1, indices.start);
assert_eq!(10, indices.stop);
assert_eq!(2, indices.step);
assert_eq!(5, indices.slicelength);
}
#[pyclass]
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struct Test {}
#[pyproto]
impl<'p> PyMappingProtocol<'p> for Test {
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fn __getitem__(&self, idx: &PyAny) -> PyResult<PyObject> {
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let gil = GILGuard::acquire();
if let Ok(slice) = idx.cast_as::<PySlice>() {
let indices = slice.indices(1000)?;
if indices.start == 100 && indices.stop == 200 && indices.step == 1 {
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return Ok("slice".into_object(gil.python()));
}
} else if let Ok(idx) = idx.extract::<isize>() {
if idx == 1 {
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return Ok("int".into_object(gil.python()));
}
}
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Err(PyErr::new::<ValueError, _>("error"))
}
}
#[test]
fn test_cls_impl() {
let gil = Python::acquire_gil();
let py = gil.python();
let ob = Py::new(py, Test {}).unwrap();
let d = [("ob", ob)].into_py_dict(py);
py.run("assert ob[1] == 'int'", None, Some(d)).unwrap();
py.run("assert ob[100:200:1] == 'slice'", None, Some(d))
.unwrap();
}
#[pyclass(dict)]
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struct DunderDictSupport {}
#[test]
fn dunder_dict_support() {
let gil = Python::acquire_gil();
let py = gil.python();
let inst = PyRef::new(py, DunderDictSupport {}).unwrap();
py_run!(
py,
inst,
r#"
inst.a = 1
assert inst.a == 1
"#
);
}
#[test]
fn access_dunder_dict() {
let gil = Python::acquire_gil();
let py = gil.python();
let inst = PyRef::new(py, DunderDictSupport {}).unwrap();
py_run!(
py,
inst,
r#"
inst.a = 1
assert inst.__dict__ == {'a': 1}
"#
);
}
#[pyclass(weakref, dict)]
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struct WeakRefDunderDictSupport {}
#[test]
fn weakref_dunder_dict_support() {
let gil = Python::acquire_gil();
let py = gil.python();
let inst = PyRef::new(py, WeakRefDunderDictSupport {}).unwrap();
py_run!(
py,
inst,
"import weakref; assert weakref.ref(inst)() is inst; inst.a = 1; assert inst.a == 1"
);
}