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136 lines
4.2 KiB
136 lines
4.2 KiB
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) == (("positional", 1), {"key": "value", "a": 1, "b": 2}) |
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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 m.test_dummy_function(m.dummy_function) == "matches dummy_function: eval(1) = 2" |
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assert (m.test_dummy_function(m.roundtrip(m.dummy_function)) == |
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"matches dummy_function: eval(1) = 2") |
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assert m.roundtrip(None, expect_none=True) is None |
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assert (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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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(s in str(excinfo.value) for s in ("missing 1 required positional argument", |
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"takes exactly 2 arguments")) |
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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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