pythonnet/tests/test_method.py at master · ashsvis/pythonnet · GitHub

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

"""Test CLR method support."""

import System

import pytest

from Python.Test import MethodTest

def test_instance_method_descriptor():

"""Test instance method descriptor behavior."""

with pytest.raises(AttributeError):

MethodTest().PublicMethod = 0

with pytest.raises(AttributeError):

MethodTest.PublicMethod = 0

with pytest.raises(AttributeError):

del MethodTest().PublicMethod

with pytest.raises(AttributeError):

del MethodTest.PublicMethod

def test_static_method_descriptor():

"""Test static method descriptor behavior."""

with pytest.raises(AttributeError):

MethodTest().PublicStaticMethod = 0

with pytest.raises(AttributeError):

MethodTest.PublicStaticMethod = 0

with pytest.raises(AttributeError):

del MethodTest().PublicStaticMethod

with pytest.raises(AttributeError):

del MethodTest.PublicStaticMethod

def test_public_instance_method():

"""Test public instance method visibility."""

ob = MethodTest()

assert ob.PublicMethod() == "public"

def test_public_static_method():

"""Test public static method visibility."""

ob = MethodTest()

assert MethodTest.PublicStaticMethod() == "public static"

assert ob.PublicStaticMethod() == "public static"

def test_protected_instance_method():

"""Test protected instance method visibility."""

ob = MethodTest()

assert ob.ProtectedMethod() == "protected"

def test_protected_static_method():

"""Test protected static method visibility."""

ob = MethodTest()

result = "protected static"

assert MethodTest.ProtectedStaticMethod() == result

assert ob.ProtectedStaticMethod() == result

def test_internal_method():

"""Test internal method visibility."""

with pytest.raises(AttributeError):

_ = MethodTest().InternalMethod

with pytest.raises(AttributeError):

_ = MethodTest.InternalMethod

with pytest.raises(AttributeError):

_ = MethodTest().InternalStaticMethod

with pytest.raises(AttributeError):

_ = MethodTest.InternalStaticMethod

def test_private_method():

"""Test private method visibility."""

with pytest.raises(AttributeError):

_ = MethodTest().PrivateMethod

with pytest.raises(AttributeError):

_ = MethodTest.PrivateMethod

with pytest.raises(AttributeError):

_ = MethodTest().PrivateStaticMethod

with pytest.raises(AttributeError):

_ = MethodTest.PrivateStaticMethod

def test_unbound_managed_method_call():

"""Test calling unbound managed methods."""

from Python.Test import MethodTestSub

ob = MethodTest()

assert MethodTest.PublicMethod(ob) == "public"

with pytest.raises(TypeError):

MethodTest.PublicMethod()

ob = MethodTestSub()

assert MethodTestSub.PublicMethod(ob) == "public"

assert MethodTestSub.PublicMethod(ob, "echo") == "echo"

with pytest.raises(TypeError):

MethodTestSub.PublicMethod("echo")

def test_overloaded_method_inheritance():

"""Test that overloads are inherited properly."""

from Python.Test import MethodTestSub

ob = MethodTest()

assert ob.PublicMethod() == "public"

with pytest.raises(TypeError):

ob = MethodTest()

ob.PublicMethod("echo")

ob = MethodTestSub()

assert ob.PublicMethod() == "public"

assert ob.PublicMethod("echo") == "echo"

def test_method_descriptor_abuse():

"""Test method descriptor abuse."""

desc = MethodTest.__dict__['PublicMethod']

with pytest.raises(TypeError):

desc.__get__(0, 0)

with pytest.raises(AttributeError):

desc.__set__(0, 0)

def test_method_docstrings():

"""Test standard method docstring generation"""

method = MethodTest.GetType

value = 'System.Type GetType()'

assert method.__doc__ == value

# ======================================================================

# Tests of specific argument and result conversion scenarios

# ======================================================================

def test_method_call_enum_conversion():

"""Test enum conversion in method call."""

from System import TypeCode

ob = MethodTest()

r = ob.TestEnumConversion(TypeCode.Int32)

assert r == TypeCode.Int32

def test_method_call_flags_conversion():

"""Test flags conversion in method call."""

from System.IO import FileAccess

ob = MethodTest()

flags = FileAccess.Read | FileAccess.Write

r = ob.TestFlagsConversion(flags)

assert r == flags

def test_method_call_struct_conversion():

"""Test struct conversion in method call."""

from System import Guid

ob = MethodTest()

guid = Guid.NewGuid()

temp = guid.ToString()

r = ob.TestStructConversion(guid)

assert r.ToString() == temp

def test_subclass_instance_conversion():

"""Test subclass instance conversion in method call."""

class TestSubException(System.Exception):

pass

ob = MethodTest()

instance = TestSubException()

result = ob.TestSubclassConversion(instance)

assert isinstance(result, System.Exception)

def test_null_array_conversion():

"""Test null array conversion in method call."""

ob = MethodTest()

r = ob.TestNullArrayConversion(None)

assert r is None

def test_string_params_args():

"""Test use of string params."""

result = MethodTest.TestStringParamsArg('one', 'two', 'three')

assert result.Length == 4

assert len(result) == 4, result

assert result[0] == 'one'

assert result[1] == 'two'

assert result[2] == 'three'

# ensures params string[] overload takes precedence over params object[]

assert result[3] == 'tail'

result = MethodTest.TestStringParamsArg(['one', 'two', 'three'])

assert len(result) == 4

assert result[0] == 'one'

assert result[1] == 'two'

assert result[2] == 'three'

assert result[3] == 'tail'

def test_object_params_args():

"""Test use of object params."""

result = MethodTest.TestObjectParamsArg('one', 'two', 'three')

assert len(result) == 3, result

assert result[0] == 'one'

assert result[1] == 'two'

assert result[2] == 'three'

result = MethodTest.TestObjectParamsArg(['one', 'two', 'three'])

assert len(result) == 3, result

assert result[0] == 'one'

assert result[1] == 'two'

assert result[2] == 'three'

def test_value_params_args():

"""Test use of value type params."""

result = MethodTest.TestValueParamsArg(1, 2, 3)

assert len(result) == 3

assert result[0] == 1

assert result[1] == 2

assert result[2] == 3

result = MethodTest.TestValueParamsArg([1, 2, 3])

assert len(result) == 3

assert result[0] == 1

assert result[1] == 2

assert result[2] == 3

def test_non_params_array_in_last_place():

"""Test overload resolution with of non-"params" array as

last parameter."""

result = MethodTest.TestNonParamsArrayInLastPlace(1, 2, 3)

assert result

def test_params_methods_with_no_params():

"""Tests that passing no arguments to a params method

passes an empty array"""

result = MethodTest.TestValueParamsArg()

assert len(result) == 0

result = MethodTest.TestOneArgWithParams('Some String')

assert len(result) == 0

result = MethodTest.TestTwoArgWithParams('Some String', 'Some Other String')

assert len(result) == 0

def test_params_methods_with_non_lists():

"""Tests that passing single parameters to a params

method will convert into an array on the .NET side"""

result = MethodTest.TestOneArgWithParams('Some String', [1, 2, 3, 4])

assert len(result) == 4

result = MethodTest.TestOneArgWithParams('Some String', 1, 2, 3, 4)

assert len(result) == 4

result = MethodTest.TestOneArgWithParams('Some String', [5])

assert len(result) == 1

result = MethodTest.TestOneArgWithParams('Some String', 5)

assert len(result) == 1

def test_params_method_with_lists():

"""Tests passing multiple lists to a params object[] method"""

result = MethodTest.TestObjectParamsArg([],[])

assert len(result) == 2

def test_string_out_params():

"""Test use of string out-parameters."""

result = MethodTest.TestStringOutParams("hi", "there")

assert isinstance(result, tuple)

assert len(result) == 2

assert result[0] is True

assert result[1] == "output string"

result = MethodTest.TestStringOutParams("hi", None)

assert isinstance(result, tuple)

assert len(result) == 2

assert result[0] is True

assert result[1] == "output string"

def test_string_ref_params():

"""Test use of string byref parameters."""

result = MethodTest.TestStringRefParams("hi", "there")

assert isinstance(result, tuple)

assert len(result) == 2

assert result[0] is True

assert result[1] == "output string"

result = MethodTest.TestStringRefParams("hi", None)

assert isinstance(result, tuple)

assert len(result) == 2

assert result[0] is True

assert result[1] == "output string"

def test_value_out_params():

"""Test use of value type out-parameters."""

result = MethodTest.TestValueOutParams("hi", 1)

assert isinstance(result, tuple)

assert len(result) == 2

assert result[0] is True

assert result[1] == 42

# None cannot be converted to a value type like int, long, etc.

with pytest.raises(TypeError):

MethodTest.TestValueOutParams("hi", None)

def test_value_ref_params():

"""Test use of value type byref parameters."""

result = MethodTest.TestValueRefParams("hi", 1)

assert isinstance(result, tuple)

assert len(result) == 2

assert result[0] is True

assert result[1] == 42

# None cannot be converted to a value type like int, long, etc.

with pytest.raises(TypeError):

MethodTest.TestValueRefParams("hi", None)

def test_object_out_params():

"""Test use of object out-parameters."""

result = MethodTest.TestObjectOutParams("hi", MethodTest())

assert isinstance(result, tuple)

assert len(result) == 2

assert result[0] is True

assert isinstance(result[1], System.Exception)

result = MethodTest.TestObjectOutParams("hi", None)

assert isinstance(result, tuple)

assert len(result) == 2

assert result[0] is True

assert isinstance(result[1], System.Exception)

def test_object_ref_params():

"""Test use of object byref parameters."""

result = MethodTest.TestObjectRefParams("hi", MethodTest())

assert isinstance(result, tuple)

assert len(result) == 2

assert result[0] is True

assert isinstance(result[1], System.Exception)

result = MethodTest.TestObjectRefParams("hi", None)

assert isinstance(result, tuple)

assert len(result) == 2

assert result[0] is True

assert isinstance(result[1], System.Exception)

def test_struct_out_params():

"""Test use of struct out-parameters."""

result = MethodTest.TestStructOutParams("hi", System.Guid.NewGuid())

assert isinstance(result, tuple)

assert len(result) == 2

assert result[0] is True

assert isinstance(result[1], System.Guid)

# None cannot be converted to a value type like a struct

with pytest.raises(TypeError):

MethodTest.TestValueRefParams("hi", None)

def test_struct_ref_params():

"""Test use of struct byref parameters."""

result = MethodTest.TestStructRefParams("hi", System.Guid.NewGuid())

assert isinstance(result, tuple)

assert len(result) == 2

assert result[0] is True

assert isinstance(result[1], System.Guid)

# None cannot be converted to a value type like a struct

with pytest.raises(TypeError):

MethodTest.TestValueRefParams("hi", None)

def test_void_single_out_param():

"""Test void method with single out-parameter."""

result = MethodTest.TestVoidSingleOutParam(9)

assert result == 42

# None cannot be converted to a value type

with pytest.raises(TypeError):

MethodTest.TestVoidSingleOutParam(None)

def test_void_single_ref_param():

"""Test void method with single ref-parameter."""

result = MethodTest.TestVoidSingleRefParam(9)

assert result == 42

# None cannot be converted to a value type

with pytest.raises(TypeError):

MethodTest.TestVoidSingleRefParam(None)

def test_single_default_param():

"""Test void method with single ref-parameter."""

result = MethodTest.TestSingleDefaultParam()

assert result == 5

def test_one_arg_and_two_default_param():

"""Test void method with single ref-parameter."""

result = MethodTest.TestOneArgAndTwoDefaultParam(11)

assert result == 22

result = MethodTest.TestOneArgAndTwoDefaultParam(15)

assert result == 26

result = MethodTest.TestOneArgAndTwoDefaultParam(20)

assert result == 31

def test_two_default_param():

"""Test void method with single ref-parameter."""

result = MethodTest.TestTwoDefaultParam()

assert result == 11

def test_explicit_selection_with_out_modifier():

"""Check explicit overload selection with out modifiers."""

refstr = System.String("").GetType().MakeByRefType()

result = MethodTest.TestStringOutParams.__overloads__[str, refstr](

"hi", "there")

assert isinstance(result, tuple)

assert len(result) == 2

assert result[0] is True

assert result[1] == "output string"

result = MethodTest.TestStringOutParams.__overloads__[str, refstr](

"hi", None)

assert isinstance(result, tuple)

assert len(result) == 2

assert result[0] is True

assert result[1] == "output string"

def test_explicit_selection_with_ref_modifier():

"""Check explicit overload selection with ref modifiers."""

refstr = System.String("").GetType().MakeByRefType()

result = MethodTest.TestStringRefParams.__overloads__[str, refstr](

"hi", "there")

assert isinstance(result, tuple)

assert len(result) == 2

assert result[0] is True

assert result[1] == "output string"

result = MethodTest.TestStringRefParams.__overloads__[str, refstr](

"hi", None)

assert isinstance(result, tuple)

assert len(result) == 2

assert result[0] is True

assert result[1] == "output string"

def test_explicit_overload_selection():

"""Check explicit overload selection using [] syntax."""

from Python.Test import ISayHello1, InterfaceTest, ShortEnum

from System import Array

inst = InterfaceTest()

value = MethodTest.Overloaded.__overloads__[System.Boolean](True)

assert value is True

value = MethodTest.Overloaded.__overloads__[bool](True)

assert value is True

value = MethodTest.Overloaded.__overloads__[System.Byte](255)

assert value == 255

value = MethodTest.Overloaded.__overloads__[System.SByte](127)

assert value == 127

value = MethodTest.Overloaded.__overloads__[System.Char](u'A')

assert value == u'A'

value = MethodTest.Overloaded.__overloads__[System.Char](65535)

assert value == chr(65535)

value = MethodTest.Overloaded.__overloads__[System.Int16](32767)

assert value == 32767

value = MethodTest.Overloaded.__overloads__[System.Int32](2147483647)

assert value == 2147483647

value = MethodTest.Overloaded.__overloads__[int](2147483647)

assert value == 2147483647

value = MethodTest.Overloaded.__overloads__[System.Int64](

9223372036854775807

)

assert value == 9223372036854775807

value = MethodTest.Overloaded.__overloads__[System.UInt16](65000)

assert value == 65000

value = MethodTest.Overloaded.__overloads__[System.UInt32](

4294967295

)

assert value == 4294967295

value = MethodTest.Overloaded.__overloads__[System.UInt64](

18446744073709551615

)

assert value == 18446744073709551615

value = MethodTest.Overloaded.__overloads__[System.Single](3.402823e38)

assert value == 3.402823e38

value = MethodTest.Overloaded.__overloads__[System.Double](

1.7976931348623157e308)

assert value == 1.7976931348623157e308

value = MethodTest.Overloaded.__overloads__[float](

1.7976931348623157e308)

assert value == 1.7976931348623157e308

value = MethodTest.Overloaded.__overloads__[System.Decimal](

System.Decimal.One)

assert value == System.Decimal.One

value = MethodTest.Overloaded.__overloads__[System.String]("spam")

assert value == "spam"

value = MethodTest.Overloaded.__overloads__[str]("spam")

assert value == "spam"

value = MethodTest.Overloaded.__overloads__[ShortEnum](ShortEnum.Zero)

assert value == ShortEnum.Zero

value = MethodTest.Overloaded.__overloads__[System.Object](inst)

assert value.__class__ == inst.__class__

value = MethodTest.Overloaded.__overloads__[InterfaceTest](inst)

assert value.__class__ == inst.__class__

iface_class = ISayHello1(InterfaceTest()).__class__

value = MethodTest.Overloaded.__overloads__[ISayHello1](inst)

assert value.__class__ != inst.__class__

assert value.__class__ == iface_class

atype = Array[System.Object]

value = MethodTest.Overloaded.__overloads__[str, int, atype](

"one", 1, atype([1, 2, 3]))

assert value == 3

value = MethodTest.Overloaded.__overloads__[str, int]("one", 1)

assert value == 1

value = MethodTest.Overloaded.__overloads__[int, str](1, "one")

assert value == 1

def test_overload_selection_with_array_types():

"""Check overload selection using array types."""

from Python.Test import ISayHello1, InterfaceTest, ShortEnum

from System import Array

inst = InterfaceTest()

vtype = Array[System.Boolean]

input_ = vtype([True, True])