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# -*- coding: utf-8 -*-
import pytest

import env  # noqa: F401

from pybind11_tests import class_ as m
from pybind11_tests import UserType, ConstructorStats


def test_repr():
    # In Python 3.3+, repr() accesses __qualname__
    assert "pybind11_type" in repr(type(UserType))
    assert "UserType" in repr(UserType)


def test_instance(msg):
    with pytest.raises(TypeError) as excinfo:
        m.NoConstructor()
    assert msg(excinfo.value) == "m.class_.NoConstructor: No constructor defined!"

    instance = m.NoConstructor.new_instance()

    cstats = ConstructorStats.get(m.NoConstructor)
    assert cstats.alive() == 1
    del instance
    assert cstats.alive() == 0


def test_type():
    assert m.check_type(1) == m.DerivedClass1
    with pytest.raises(RuntimeError) as execinfo:
        m.check_type(0)

    assert "pybind11::detail::get_type_info: unable to find type info" in str(
        execinfo.value
    )
    assert "Invalid" in str(execinfo.value)

    # Currently not supported
    # See https://github.com/pybind/pybind11/issues/2486
    # assert m.check_type(2) == int


def test_type_of_py():
    assert m.get_type_of(1) == int
    assert m.get_type_of(m.DerivedClass1()) == m.DerivedClass1
    assert m.get_type_of(int) == type


def test_type_of_classic():
    assert m.get_type_classic(1) == int
    assert m.get_type_classic(m.DerivedClass1()) == m.DerivedClass1
    assert m.get_type_classic(int) == type


def test_type_of_py_nodelete():
    # If the above test deleted the class, this will segfault
    assert m.get_type_of(m.DerivedClass1()) == m.DerivedClass1


def test_as_type_py():
    assert m.as_type(int) == int

    with pytest.raises(TypeError):
        assert m.as_type(1) == int

    with pytest.raises(TypeError):
        assert m.as_type(m.DerivedClass1()) == m.DerivedClass1


def test_docstrings(doc):
    assert doc(UserType) == "A `py::class_` type for testing"
    assert UserType.__name__ == "UserType"
    assert UserType.__module__ == "pybind11_tests"
    assert UserType.get_value.__name__ == "get_value"
    assert UserType.get_value.__module__ == "pybind11_tests"

    assert (
        doc(UserType.get_value)
        == """
        get_value(self: m.UserType) -> int

        Get value using a method
    """
    )
    assert doc(UserType.value) == "Get/set value using a property"

    assert (
        doc(m.NoConstructor.new_instance)
        == """
        new_instance() -> m.class_.NoConstructor

        Return an instance
    """
    )


def test_qualname(doc):
    """Tests that a properly qualified name is set in __qualname__ (even in pre-3.3, where we
    backport the attribute) and that generated docstrings properly use it and the module name"""
    assert m.NestBase.__qualname__ == "NestBase"
    assert m.NestBase.Nested.__qualname__ == "NestBase.Nested"

    assert (
        doc(m.NestBase.__init__)
        == """
        __init__(self: m.class_.NestBase) -> None
    """
    )
    assert (
        doc(m.NestBase.g)
        == """
        g(self: m.class_.NestBase, arg0: m.class_.NestBase.Nested) -> None
    """
    )
    assert (
        doc(m.NestBase.Nested.__init__)
        == """
        __init__(self: m.class_.NestBase.Nested) -> None
    """
    )
    assert (
        doc(m.NestBase.Nested.fn)
        == """
        fn(self: m.class_.NestBase.Nested, arg0: int, arg1: m.class_.NestBase, arg2: m.class_.NestBase.Nested) -> None
    """  # noqa: E501 line too long
    )
    assert (
        doc(m.NestBase.Nested.fa)
        == """
        fa(self: m.class_.NestBase.Nested, a: int, b: m.class_.NestBase, c: m.class_.NestBase.Nested) -> None
    """  # noqa: E501 line too long
    )
    assert m.NestBase.__module__ == "pybind11_tests.class_"
    assert m.NestBase.Nested.__module__ == "pybind11_tests.class_"


def test_inheritance(msg):
    roger = m.Rabbit("Rabbit")
    assert roger.name() + " is a " + roger.species() == "Rabbit is a parrot"
    assert m.pet_name_species(roger) == "Rabbit is a parrot"

    polly = m.Pet("Polly", "parrot")
    assert polly.name() + " is a " + polly.species() == "Polly is a parrot"
    assert m.pet_name_species(polly) == "Polly is a parrot"

    molly = m.Dog("Molly")
    assert molly.name() + " is a " + molly.species() == "Molly is a dog"
    assert m.pet_name_species(molly) == "Molly is a dog"

    fred = m.Hamster("Fred")
    assert fred.name() + " is a " + fred.species() == "Fred is a rodent"

    assert m.dog_bark(molly) == "Woof!"

    with pytest.raises(TypeError) as excinfo:
        m.dog_bark(polly)
    assert (
        msg(excinfo.value)
        == """
        dog_bark(): incompatible function arguments. The following argument types are supported:
            1. (arg0: m.class_.Dog) -> str

        Invoked with: <m.class_.Pet object at 0>
    """
    )

    with pytest.raises(TypeError) as excinfo:
        m.Chimera("lion", "goat")
    assert "No constructor defined!" in str(excinfo.value)


def test_inheritance_init(msg):

    # Single base
    class Python(m.Pet):
        def __init__(self):
            pass

    with pytest.raises(TypeError) as exc_info:
        Python()
    expected = "m.class_.Pet.__init__() must be called when overriding __init__"
    assert msg(exc_info.value) == expected

    # Multiple bases
    class RabbitHamster(m.Rabbit, m.Hamster):
        def __init__(self):
            m.Rabbit.__init__(self, "RabbitHamster")

    with pytest.raises(TypeError) as exc_info:
        RabbitHamster()
    expected = "m.class_.Hamster.__init__() must be called when overriding __init__"
    assert msg(exc_info.value) == expected


def test_automatic_upcasting():
    assert type(m.return_class_1()).__name__ == "DerivedClass1"
    assert type(m.return_class_2()).__name__ == "DerivedClass2"
    assert type(m.return_none()).__name__ == "NoneType"
    # Repeat these a few times in a random order to ensure no invalid caching is applied
    assert type(m.return_class_n(1)).__name__ == "DerivedClass1"
    assert type(m.return_class_n(2)).__name__ == "DerivedClass2"
    assert type(m.return_class_n(0)).__name__ == "BaseClass"
    assert type(m.return_class_n(2)).__name__ == "DerivedClass2"
    assert type(m.return_class_n(2)).__name__ == "DerivedClass2"
    assert type(m.return_class_n(0)).__name__ == "BaseClass"


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