99 lines
3.8 KiB
Python
99 lines
3.8 KiB
Python
import pytest
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def test_callbacks():
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from functools import partial
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from pybind11_tests import (test_callback1, test_callback2, test_callback3,
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test_callback4, test_callback5)
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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 test_callback1(func1) == "func1"
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assert test_callback2(func2) == ("func2", "Hello", "x", True, 5)
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assert test_callback1(partial(func2, 1, 2, 3, 4)) == ("func2", 1, 2, 3, 4)
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assert test_callback1(partial(func3, "partial")) == "func3(partial)"
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assert test_callback3(lambda i: i + 1) == "func(43) = 44"
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f = test_callback4()
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assert f(43) == 44
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f = test_callback5()
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assert f(number=43) == 44
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def test_keyword_args_and_generalized_unpacking():
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from pybind11_tests import (test_tuple_unpacking, test_dict_unpacking, test_keyword_args,
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test_unpacking_and_keywords1, test_unpacking_and_keywords2,
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test_unpacking_error1, test_unpacking_error2,
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test_arg_conversion_error1, test_arg_conversion_error2)
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def f(*args, **kwargs):
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return args, kwargs
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assert test_tuple_unpacking(f) == (("positional", 1, 2, 3, 4, 5, 6), {})
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assert test_dict_unpacking(f) == (("positional", 1), {"key": "value", "a": 1, "b": 2})
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assert test_keyword_args(f) == ((), {"x": 10, "y": 20})
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assert test_unpacking_and_keywords1(f) == ((1, 2), {"c": 3, "d": 4})
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assert 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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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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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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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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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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from pybind11_tests import test_cleanup, payload_cstats
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test_cleanup()
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cstats = 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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from pybind11_tests import dummy_function, dummy_function2, test_dummy_function, roundtrip
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assert test_dummy_function(dummy_function) == "matches dummy_function: eval(1) = 2"
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assert test_dummy_function(roundtrip(dummy_function)) == "matches dummy_function: eval(1) = 2"
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assert roundtrip(None, expect_none=True) is None
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assert test_dummy_function(lambda x: x + 2) == "can't convert to function pointer: eval(1) = 3"
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with pytest.raises(TypeError) as excinfo:
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test_dummy_function(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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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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from pybind11_tests import test_callback3, test_callback4
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assert doc(test_callback3) == "test_callback3(arg0: Callable[[int], int]) -> str"
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assert doc(test_callback4) == "test_callback4() -> Callable[[int], int]"
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