mirror of
https://github.com/pybind/pybind11.git
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259 lines
7.7 KiB
Python
259 lines
7.7 KiB
Python
from __future__ import annotations
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import sys
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import time
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from threading import Thread
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import pytest
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import env # noqa: F401
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from pybind11_tests import callbacks as m
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from pybind11_tests import detailed_error_messages_enabled
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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 f"func3({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 str(excinfo.value) == "Unable to convert call argument " + (
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"'1' of type 'UnregisteredType' to Python object"
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if detailed_error_messages_enabled
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else "'1' to Python object (#define PYBIND11_DETAILED_ERROR_MESSAGES or compile in debug mode for details)"
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)
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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 str(excinfo.value) == "Unable to convert call argument " + (
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"'expected_name' of type 'UnregisteredType' to Python object"
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if detailed_error_messages_enabled
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else "'expected_name' to Python object "
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"(#define PYBIND11_DETAILED_ERROR_MESSAGES or compile in debug mode for details)"
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)
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def test_lambda_closure_cleanup():
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m.test_lambda_closure_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_callable_cleanup():
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alive_counts = m.test_cpp_callable_cleanup()
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assert alive_counts == [0, 1, 2, 1, 2, 1, 0]
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def test_cpp_correct_overload_resolution():
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def f(a):
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return a
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class A:
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def __call__(self, a):
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return a
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assert m.dummy_function_overloaded_std_func_arg(f) == 9
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a = A()
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assert m.dummy_function_overloaded_std_func_arg(a) == 9
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assert m.dummy_function_overloaded_std_func_arg(lambda i: i) == 9
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def f2(a, b):
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return a + b
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class B:
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def __call__(self, a, b):
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return a + b
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assert m.dummy_function_overloaded_std_func_arg(f2) == 14
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assert m.dummy_function_overloaded_std_func_arg(B()) == 14
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assert m.dummy_function_overloaded_std_func_arg(lambda i, j: i + j) == 14
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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 (
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m.test_dummy_function(m.dummy_function_overloaded)
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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 (
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"incompatible function arguments. The following argument types are",
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"function test_cpp_function_roundtrip.<locals>.<lambda>",
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)
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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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@pytest.mark.skipif(
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"env.PYPY",
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reason="PyPy segfaults on here. See discussion on #1413.",
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)
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def test_python_builtins():
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"""Test if python builtins like sum() can be used as callbacks"""
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assert m.test_sum_builtin(sum, [1, 2, 3]) == 6
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assert m.test_sum_builtin(sum, []) == 0
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@pytest.mark.skipif(sys.platform.startswith("emscripten"), reason="Requires threads")
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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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@pytest.mark.skipif(sys.platform.startswith("emscripten"), reason="Requires threads")
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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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def test_callback_num_times():
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# Super-simple micro-benchmarking related to PR #2919.
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# Example runtimes (Intel Xeon 2.2GHz, fully optimized):
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# num_millions 1, repeats 2: 0.1 secs
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# num_millions 20, repeats 10: 11.5 secs
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one_million = 1000000
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num_millions = 1 # Try 20 for actual micro-benchmarking.
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repeats = 2 # Try 10.
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rates = []
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for rep in range(repeats):
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t0 = time.time()
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m.callback_num_times(lambda: None, num_millions * one_million)
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td = time.time() - t0
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rate = num_millions / td if td else 0
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rates.append(rate)
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if not rep:
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print()
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print(
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f"callback_num_times: {num_millions:d} million / {td:.3f} seconds = {rate:.3f} million / second"
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)
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if len(rates) > 1:
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print("Min Mean Max")
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print(f"{min(rates):6.3f} {sum(rates) / len(rates):6.3f} {max(rates):6.3f}")
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def test_custom_func():
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assert m.custom_function(4) == 36
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assert m.roundtrip(m.custom_function)(4) == 36
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@pytest.mark.skipif(
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m.custom_function2 is None, reason="Current PYBIND11_INTERNALS_VERSION too low"
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)
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def test_custom_func2():
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assert m.custom_function2(3) == 27
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assert m.roundtrip(m.custom_function2)(3) == 27
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def test_callback_docstring():
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assert (
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m.test_tuple_unpacking.__doc__.strip()
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== "test_tuple_unpacking(arg0: Callable) -> object"
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)
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