pyo3/tests/test_methods.rs

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use pyo3::prelude::*;
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use pyo3::py_run;
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use pyo3::types::{IntoPyDict, PyDict, PyList, PySet, PyString, PyTuple, PyType};
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use pyo3::PyRawObject;
mod common;
#[pyclass]
struct InstanceMethod {
member: i32,
}
#[pymethods]
impl InstanceMethod {
/// Test method
fn method(&self) -> PyResult<i32> {
Ok(self.member)
}
}
#[test]
fn instance_method() {
let gil = Python::acquire_gil();
let py = gil.python();
let obj = PyRefMut::new(py, InstanceMethod { member: 42 }).unwrap();
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assert_eq!(obj.method().unwrap(), 42);
let d = [("obj", obj)].into_py_dict(py);
py.run("assert obj.method() == 42", None, Some(d)).unwrap();
py.run("assert obj.method.__doc__ == 'Test method'", None, Some(d))
.unwrap();
}
#[pyclass]
struct InstanceMethodWithArgs {
member: i32,
}
#[pymethods]
impl InstanceMethodWithArgs {
fn method(&self, multiplier: i32) -> PyResult<i32> {
Ok(self.member * multiplier)
}
}
#[test]
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#[allow(dead_code)]
fn instance_method_with_args() {
let gil = Python::acquire_gil();
let py = gil.python();
let obj = PyRefMut::new(py, InstanceMethodWithArgs { member: 7 }).unwrap();
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assert_eq!(obj.method(6).unwrap(), 42);
let d = [("obj", obj)].into_py_dict(py);
py.run("assert obj.method(3) == 21", None, Some(d)).unwrap();
py.run("assert obj.method(multiplier=6) == 42", None, Some(d))
.unwrap();
}
#[pyclass]
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struct ClassMethod {}
#[pymethods]
impl ClassMethod {
#[new]
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fn new(obj: &PyRawObject) {
obj.init(ClassMethod {})
}
#[classmethod]
/// Test class method.
fn method(cls: &PyType) -> PyResult<String> {
Ok(format!("{}.method()!", cls.name()))
}
}
#[test]
fn class_method() {
let gil = Python::acquire_gil();
let py = gil.python();
let d = [("C", py.get_type::<ClassMethod>())].into_py_dict(py);
py.run(
"assert C.method() == 'ClassMethod.method()!'",
None,
Some(d),
)
.unwrap();
py.run(
"assert C().method() == 'ClassMethod.method()!'",
None,
Some(d),
)
.unwrap();
py.run(
"assert C.method.__doc__ == 'Test class method.'",
None,
Some(d),
)
.unwrap();
py.run(
"assert C().method.__doc__ == 'Test class method.'",
None,
Some(d),
)
.unwrap();
}
#[pyclass]
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struct ClassMethodWithArgs {}
#[pymethods]
impl ClassMethodWithArgs {
#[classmethod]
fn method(cls: &PyType, input: &PyString) -> PyResult<String> {
Ok(format!("{}.method({})", cls.name(), input))
}
}
#[test]
fn class_method_with_args() {
let gil = Python::acquire_gil();
let py = gil.python();
let d = [("C", py.get_type::<ClassMethodWithArgs>())].into_py_dict(py);
py.run(
"assert C.method('abc') == 'ClassMethodWithArgs.method(abc)'",
None,
Some(d),
)
.unwrap();
}
#[pyclass]
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struct StaticMethod {}
#[pymethods]
impl StaticMethod {
#[new]
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fn new(obj: &PyRawObject) {
obj.init(StaticMethod {})
}
#[staticmethod]
/// Test static method.
fn method(_py: Python) -> PyResult<&'static str> {
Ok("StaticMethod.method()!")
}
}
#[test]
fn static_method() {
let gil = Python::acquire_gil();
let py = gil.python();
assert_eq!(StaticMethod::method(py).unwrap(), "StaticMethod.method()!");
let d = [("C", py.get_type::<StaticMethod>())].into_py_dict(py);
py.run(
"assert C.method() == 'StaticMethod.method()!'",
None,
Some(d),
)
.unwrap();
py.run(
"assert C().method() == 'StaticMethod.method()!'",
None,
Some(d),
)
.unwrap();
py.run(
"assert C.method.__doc__ == 'Test static method.'",
None,
Some(d),
)
.unwrap();
py.run(
"assert C().method.__doc__ == 'Test static method.'",
None,
Some(d),
)
.unwrap();
}
#[pyclass]
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struct StaticMethodWithArgs {}
#[pymethods]
impl StaticMethodWithArgs {
#[staticmethod]
fn method(_py: Python, input: i32) -> PyResult<String> {
Ok(format!("0x{:x}", input))
}
}
#[test]
fn static_method_with_args() {
let gil = Python::acquire_gil();
let py = gil.python();
assert_eq!(StaticMethodWithArgs::method(py, 1234).unwrap(), "0x4d2");
let d = [("C", py.get_type::<StaticMethodWithArgs>())].into_py_dict(py);
py.run("assert C.method(1337) == '0x539'", None, Some(d))
.unwrap();
}
#[pyclass]
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struct MethArgs {}
#[pymethods]
impl MethArgs {
#[args(test)]
fn get_optional(&self, test: Option<i32>) -> PyResult<i32> {
Ok(test.unwrap_or(10))
}
#[args(test = "10")]
fn get_default(&self, test: i32) -> PyResult<i32> {
Ok(test)
}
#[args("*", test = 10)]
fn get_kwarg(&self, test: i32) -> PyResult<i32> {
Ok(test)
}
#[args(args = "*", kwargs = "**")]
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fn get_kwargs(
&self,
py: Python,
args: &PyTuple,
kwargs: Option<&PyDict>,
) -> PyResult<PyObject> {
Ok([args.into(), kwargs.to_object(py)].to_object(py))
}
#[args(args = "*", kwargs = "**")]
fn get_pos_arg_kw(
&self,
py: Python,
a: i32,
args: &PyTuple,
kwargs: Option<&PyDict>,
) -> PyObject {
[a.to_object(py), args.into(), kwargs.to_object(py)].to_object(py)
}
#[args(kwargs = "**")]
fn get_pos_kw(&self, py: Python, a: i32, kwargs: Option<&PyDict>) -> PyObject {
[a.to_object(py), kwargs.to_object(py)].to_object(py)
}
// "args" can be anything that can be extracted from PyTuple
#[args(args = "*")]
fn args_as_vec(&self, args: Vec<i32>) -> i32 {
args.iter().sum()
}
}
#[test]
fn meth_args() {
let gil = Python::acquire_gil();
let py = gil.python();
let inst = Py::new(py, MethArgs {}).unwrap();
py_run!(py, inst, "assert inst.get_optional() == 10");
py_run!(py, inst, "assert inst.get_optional(100) == 100");
py_run!(py, inst, "assert inst.get_default() == 10");
py_run!(py, inst, "assert inst.get_default(100) == 100");
py_run!(py, inst, "assert inst.get_kwarg() == 10");
py_run!(py, inst, "assert inst.get_kwarg(100) == 10");
py_run!(py, inst, "assert inst.get_kwarg(test=100) == 100");
py_run!(py, inst, "assert inst.get_kwargs() == [(), None]");
py_run!(py, inst, "assert inst.get_kwargs(1,2,3) == [(1,2,3), None]");
py_run!(
py,
inst,
"assert inst.get_kwargs(t=1,n=2) == [(), {'t': 1, 'n': 2}]"
);
py_run!(
py,
inst,
"assert inst.get_kwargs(1,2,3,t=1,n=2) == [(1,2,3), {'t': 1, 'n': 2}]"
);
py_run!(py, inst, "assert inst.get_pos_arg_kw(1) == [1, (), None]");
py_run!(
py,
inst,
"assert inst.get_pos_arg_kw(1, 2, 3) == [1, (2, 3), None]"
);
py_run!(
py,
inst,
"assert inst.get_pos_arg_kw(1, b=2) == [1, (), {'b': 2}]"
);
py_run!(py, inst, "assert inst.get_pos_arg_kw(a=1) == [1, (), None]");
py_expect_exception!(py, inst, "inst.get_pos_arg_kw()", TypeError);
py_expect_exception!(py, inst, "inst.get_pos_arg_kw(1, a=1)", TypeError);
py_expect_exception!(py, inst, "inst.get_pos_arg_kw(b=2)", TypeError);
py_run!(py, inst, "assert inst.get_pos_kw(1, b=2) == [1, {'b': 2}]");
py_expect_exception!(py, inst, "inst.get_pos_kw(1,2)", TypeError);
py_run!(py, inst, "assert inst.args_as_vec(1,2,3) == 6");
}
#[pyclass]
/// A class with "documentation".
struct MethDocs {
x: i32,
}
#[pymethods]
impl MethDocs {
/// A method with "documentation" as well.
fn method(&self) -> PyResult<i32> {
Ok(0)
}
#[getter]
/// `int`: a very "important" member of 'this' instance.
fn get_x(&self) -> PyResult<i32> {
Ok(self.x)
}
}
#[test]
fn meth_doc() {
let gil = Python::acquire_gil();
let py = gil.python();
let d = [("C", py.get_type::<MethDocs>())].into_py_dict(py);
py.run(
"assert C.__doc__ == 'A class with \"documentation\".'",
None,
Some(d),
)
.unwrap();
py.run(
"assert C.method.__doc__ == 'A method with \"documentation\" as well.'",
None,
Some(d),
)
.unwrap();
py.run(
"assert C.x.__doc__ == '`int`: a very \"important\" member of \\'this\\' instance.'",
None,
Some(d),
)
.unwrap();
}
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#[pyclass]
struct MethodWithLifeTime {}
#[pymethods]
impl MethodWithLifeTime {
fn set_to_list<'py>(&self, py: Python<'py>, set: &'py PySet) -> PyResult<&'py PyList> {
let mut items = vec![];
for _ in 0..set.len() {
items.push(set.pop().unwrap());
}
let list = PyList::new(py, items);
list.sort()?;
Ok(list)
}
}
#[test]
fn method_with_lifetime() {
let gil = Python::acquire_gil();
let py = gil.python();
let obj = PyRef::new(py, MethodWithLifeTime {}).unwrap();
py_run!(
py,
obj,
"assert obj.set_to_list(set((1, 2, 3))) == [1, 2, 3]"
);
}