test_constants_and_functions.py

import pytest


def test_constants():
    from pybind11_tests import some_constant

    assert some_constant == 14


def test_function_overloading():
    from pybind11_tests import EMyEnumeration, test_function

    assert test_function() == "test_function()"
    assert test_function(7) == "test_function(7)"
    assert test_function(EMyEnumeration.EFirstEntry) == "test_function(enum=1)"
    assert test_function(EMyEnumeration.ESecondEntry) == "test_function(enum=2)"


def test_unscoped_enum():
    from pybind11_tests import EMyEnumeration, EFirstEntry

    assert str(EMyEnumeration.EFirstEntry) == "EMyEnumeration.EFirstEntry"
    assert str(EMyEnumeration.ESecondEntry) == "EMyEnumeration.ESecondEntry"
    assert str(EFirstEntry) == "EMyEnumeration.EFirstEntry"

    # no TypeError exception for unscoped enum ==/!= int comparisons
    y = EMyEnumeration.ESecondEntry
    assert y == 2
    assert y != 3

    assert int(EMyEnumeration.ESecondEntry) == 2
    assert str(EMyEnumeration(2)) == "EMyEnumeration.ESecondEntry"


def test_scoped_enum():
    from pybind11_tests import ECMyEnum, test_ecenum

    assert test_ecenum(ECMyEnum.Three) == "test_ecenum(ECMyEnum::Three)"
    z = ECMyEnum.Two
    assert test_ecenum(z) == "test_ecenum(ECMyEnum::Two)"

    # expected TypeError exceptions for scoped enum ==/!= int comparisons
    with pytest.raises(TypeError):
        assert z == 2
    with pytest.raises(TypeError):
        assert z != 3


def test_implicit_conversion():
    from pybind11_tests import ExampleWithEnum

    assert str(ExampleWithEnum.EMode.EFirstMode) == "EMode.EFirstMode"
    assert str(ExampleWithEnum.EFirstMode) == "EMode.EFirstMode"

    f = ExampleWithEnum.test_function
    first = ExampleWithEnum.EFirstMode
    second = ExampleWithEnum.ESecondMode

    assert f(first) == 1

    assert f(first) == f(first)
    assert not f(first) != f(first)

    assert f(first) != f(second)
    assert not f(first) == f(second)

    assert f(first) == int(f(first))
    assert not f(first) != int(f(first))

    assert f(first) != int(f(second))
    assert not f(first) == int(f(second))

    # noinspection PyDictCreation
    x = {f(first): 1, f(second): 2}
    x[f(first)] = 3
    x[f(second)] = 4
    # Hashing test
    assert str(x) == "{EMode.EFirstMode: 3, EMode.ESecondMode: 4}"


def test_bytes():
    from pybind11_tests import return_bytes, print_bytes

    assert print_bytes(return_bytes()) == "bytes[1 0 2 0]"