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pythonnet/tests/test_constructors.py at v3.2.0-rc2 · pythonnet/pythonnet · GitHub

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# -*- coding: utf-8 -*-

"""Test CLR class constructor support."""

import pytest

import sys

import System

def test_enum_constructor():

"""Test enum constructor args"""

from System import TypeCode

from Python.Test import EnumConstructorTest

ob = EnumConstructorTest(TypeCode.Int32)

assert ob.value == TypeCode.Int32

def test_flags_constructor():

"""Test flags constructor args"""

from Python.Test import FlagsConstructorTest

from System.IO import FileAccess

flags = FileAccess.Read | FileAccess.Write

ob = FlagsConstructorTest(flags)

assert ob.value == flags

def test_struct_constructor():

"""Test struct constructor args"""

from System import Guid

from Python.Test import StructConstructorTest

guid = Guid.NewGuid()

ob = StructConstructorTest(guid)

assert ob.value == guid

def test_datetime():

inst = System.DateTime(2021, 12, 29)

assert inst.Year == 2021

def test_subclass_constructor():

"""Test subclass constructor args"""

from Python.Test import SubclassConstructorTest

class Sub(System.Exception):

pass

instance = Sub()

ob = SubclassConstructorTest(instance)

assert isinstance(ob.value, System.Exception)

def test_multiple_constructor():

from Python.Test import MultipleConstructorsTest

# Test parameterless

ob = MultipleConstructorsTest()

assert ob.value == ""

def test_default_constructor_fallback():

from Python.Test import DefaultConstructorMatching

ob = DefaultConstructorMatching(2)

assert ob.a == 2

with pytest.raises(TypeError):

ob = DefaultConstructorMatching("2")

def test_constructor_leak():

from System import Uri

from Python.Runtime import Runtime

uri = Uri("http://www.python.org")

Runtime.TryCollectingGarbage(20)

ref_count = sys.getrefcount(uri)

# check disabled due to GC uncertainty

# assert ref_count == 1

def test_string_constructor():

from System import String, Char, Array

ob = String('A', 10)

assert ob == 'A' * 10

arr = Array[Char](10)

for i in range(10):

arr[i] = Char(str(i))

ob = String(arr)

assert ob == "0123456789"

ob = String(arr, 5, 4)

assert ob == "5678"

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