mirror of
https://github.com/pybind/pybind11.git
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149 lines
4.3 KiB
Python
149 lines
4.3 KiB
Python
# -*- coding: utf-8 -*-
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import pytest
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from pybind11_tests import callbacks as m
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from threading import Thread
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def test_callbacks():
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from functools import partial
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def func1():
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return "func1"
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def func2(a, b, c, d):
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return "func2", a, b, c, d
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def func3(a):
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return "func3({})".format(a)
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assert m.test_callback1(func1) == "func1"
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assert m.test_callback2(func2) == ("func2", "Hello", "x", True, 5)
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assert m.test_callback1(partial(func2, 1, 2, 3, 4)) == ("func2", 1, 2, 3, 4)
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assert m.test_callback1(partial(func3, "partial")) == "func3(partial)"
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assert m.test_callback3(lambda i: i + 1) == "func(43) = 44"
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f = m.test_callback4()
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assert f(43) == 44
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f = m.test_callback5()
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assert f(number=43) == 44
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def test_bound_method_callback():
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# Bound Python method:
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class MyClass:
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def double(self, val):
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return 2 * val
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z = MyClass()
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assert m.test_callback3(z.double) == "func(43) = 86"
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z = m.CppBoundMethodTest()
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assert m.test_callback3(z.triple) == "func(43) = 129"
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def test_keyword_args_and_generalized_unpacking():
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def f(*args, **kwargs):
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return args, kwargs
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assert m.test_tuple_unpacking(f) == (("positional", 1, 2, 3, 4, 5, 6), {})
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assert m.test_dict_unpacking(f) == (
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("positional", 1),
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{"key": "value", "a": 1, "b": 2},
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)
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assert m.test_keyword_args(f) == ((), {"x": 10, "y": 20})
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assert m.test_unpacking_and_keywords1(f) == ((1, 2), {"c": 3, "d": 4})
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assert m.test_unpacking_and_keywords2(f) == (
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("positional", 1, 2, 3, 4, 5),
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{"key": "value", "a": 1, "b": 2, "c": 3, "d": 4, "e": 5},
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)
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with pytest.raises(TypeError) as excinfo:
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m.test_unpacking_error1(f)
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assert "Got multiple values for keyword argument" in str(excinfo.value)
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with pytest.raises(TypeError) as excinfo:
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m.test_unpacking_error2(f)
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assert "Got multiple values for keyword argument" in str(excinfo.value)
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with pytest.raises(RuntimeError) as excinfo:
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m.test_arg_conversion_error1(f)
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assert "Unable to convert call argument" in str(excinfo.value)
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with pytest.raises(RuntimeError) as excinfo:
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m.test_arg_conversion_error2(f)
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assert "Unable to convert call argument" in str(excinfo.value)
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def test_lambda_closure_cleanup():
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m.test_cleanup()
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cstats = m.payload_cstats()
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assert cstats.alive() == 0
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assert cstats.copy_constructions == 1
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assert cstats.move_constructions >= 1
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def test_cpp_function_roundtrip():
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"""Test if passing a function pointer from C++ -> Python -> C++ yields the original pointer"""
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assert (
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m.test_dummy_function(m.dummy_function) == "matches dummy_function: eval(1) = 2"
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)
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assert (
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m.test_dummy_function(m.roundtrip(m.dummy_function))
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== "matches dummy_function: eval(1) = 2"
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)
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assert m.roundtrip(None, expect_none=True) is None
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assert (
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m.test_dummy_function(lambda x: x + 2)
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== "can't convert to function pointer: eval(1) = 3"
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)
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with pytest.raises(TypeError) as excinfo:
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m.test_dummy_function(m.dummy_function2)
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assert "incompatible function arguments" in str(excinfo.value)
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with pytest.raises(TypeError) as excinfo:
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m.test_dummy_function(lambda x, y: x + y)
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assert any(
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s in str(excinfo.value)
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for s in ("missing 1 required positional argument", "takes exactly 2 arguments")
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)
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def test_function_signatures(doc):
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assert doc(m.test_callback3) == "test_callback3(arg0: Callable[[int], int]) -> str"
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assert doc(m.test_callback4) == "test_callback4() -> Callable[[int], int]"
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def test_movable_object():
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assert m.callback_with_movable(lambda _: None) is True
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def test_async_callbacks():
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# serves as state for async callback
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class Item:
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def __init__(self, value):
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self.value = value
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res = []
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# generate stateful lambda that will store result in `res`
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def gen_f():
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s = Item(3)
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return lambda j: res.append(s.value + j)
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# do some work async
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work = [1, 2, 3, 4]
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m.test_async_callback(gen_f(), work)
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# wait until work is done
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from time import sleep
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sleep(0.5)
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assert sum(res) == sum([x + 3 for x in work])
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def test_async_async_callbacks():
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t = Thread(target=test_async_callbacks)
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t.start()
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t.join()
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