test_array.py

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

"""Test support for managed arrays."""

import clr
import Python.Test as Test
import System
import pytest

from collections import UserList
from System import Single as float32


def test_public_array():
    """Test public arrays."""
    ob = Test.PublicArrayTest()
    items = ob.items

    assert len(items) == 5

    assert items[0] == 0
    assert items[4] == 4

    items[0] = 8
    assert items[0] == 8

    items[4] = 9
    assert items[4] == 9

    items[-4] = 0
    assert items[-4] == 0

    items[-1] = 4
    assert items[-1] == 4


def test_protected_array():
    """Test protected arrays."""
    ob = Test.ProtectedArrayTest()
    items = ob.items

    assert len(items) == 5

    assert items[0] == 0
    assert items[4] == 4

    items[0] = 8
    assert items[0] == 8

    items[4] = 9
    assert items[4] == 9

    items[-4] = 0
    assert items[-4] == 0

    items[-1] = 4
    assert items[-1] == 4


def test_internal_array():
    """Test internal arrays."""

    with pytest.raises(AttributeError):
        ob = Test.InternalArrayTest()
        _ = ob.items


def test_private_array():
    """Test private arrays."""

    with pytest.raises(AttributeError):
        ob = Test.PrivateArrayTest()
        _ = ob.items


def test_array_bounds_checking():
    """Test array bounds checking."""

    ob = Test.Int32ArrayTest()
    items = ob.items

    assert items[0] == 0
    assert items[1] == 1
    assert items[2] == 2
    assert items[3] == 3
    assert items[4] == 4

    assert items[-5] == 0
    assert items[-4] == 1
    assert items[-3] == 2
    assert items[-2] == 3
    assert items[-1] == 4

    with pytest.raises(IndexError):
        ob = Test.Int32ArrayTest()
        _ = ob.items[5]

    with pytest.raises(IndexError):
        ob = Test.Int32ArrayTest()
        ob.items[5] = 0

    with pytest.raises(IndexError):
        ob = Test.Int32ArrayTest()
        items[-6]

    with pytest.raises(IndexError):
        ob = Test.Int32ArrayTest()
        items[-6] = 0


def test_array_contains():
    """Test array support for __contains__."""

    ob = Test.Int32ArrayTest()
    items = ob.items

    assert 0 in items
    assert 1 in items
    assert 2 in items
    assert 3 in items
    assert 4 in items

    assert not (5 in items)  # "H:\Python27\Lib\unittest\case.py", line 592, in deprecated_func,
    assert not (-1 in items)  # TypeError: int() argument must be a string or a number, not 'NoneType'
    assert not (None in items)  # which threw ^ here which is a little odd.
    # But when run from runtests.py. Not when this module ran by itself.


def test_boolean_array():
    """Test boolean arrays."""
    ob = Test.BooleanArrayTest()
    items = ob.items

    assert len(items) == 5

    assert items[0] is True
    assert items[1] is False
    assert items[2] is True
    assert items[3] is False
    assert items[4] is True

    items[0] = False
    assert items[0] is False

    items[0] = True
    assert items[0] is True

    with pytest.raises(TypeError):
        ob = Test.ByteArrayTest()
        _ = ob.items["wrong"]

    with pytest.raises(TypeError):
        ob = Test.ByteArrayTest()
        ob[0] = "wrong"


def test_byte_array():
    """Test byte arrays."""
    ob = Test.ByteArrayTest()
    items = ob.items

    assert len(items) == 5

    assert items[0] == 0
    assert items[4] == 4

    max_ = 255
    min_ = 0

    items[0] = max_
    assert items[0] == max_

    items[0] = min_
    assert items[0] == min_

    items[-4] = max_
    assert items[-4] == max_

    items[-1] = min_
    assert items[-1] == min_

    with pytest.raises(OverflowError):
        ob = Test.ByteArrayTest()
        ob.items[0] = max_ + 1

    with pytest.raises(OverflowError):
        ob = Test.ByteArrayTest()
        ob.items[0] = min_ - 1

    with pytest.raises(TypeError):
        ob = Test.ByteArrayTest()
        _ = ob.items["wrong"]

    with pytest.raises(TypeError):
        ob = Test.ByteArrayTest()
        ob[0] = "wrong"


def test_sbyte_array():
    """Test sbyte arrays."""
    ob = Test.SByteArrayTest()
    items = ob.items

    assert len(items) == 5

    assert items[0] == 0
    assert items[4] == 4

    max_ = 127
    min_ = -128

    items[0] = max_
    assert items[0] == max_

    items[0] = min_
    assert items[0] == min_

    items[-4] = max_
    assert items[-4] == max_

    items[-1] = min_
    assert items[-1] == min_

    with pytest.raises(OverflowError):
        ob = Test.SByteArrayTest()
        ob.items[0] = max_ + 1

    with pytest.raises(OverflowError):
        ob = Test.SByteArrayTest()
        ob.items[0] = min_ - 1

    with pytest.raises(TypeError):
        ob = Test.SByteArrayTest()
        _ = ob.items["wrong"]

    with pytest.raises(TypeError):
        ob = Test.SByteArrayTest()
        ob[0] = "wrong"


def test_char_array():
    """Test char arrays."""
    ob = Test.CharArrayTest()
    items = ob.items

    assert len(items) == 5

    assert items[0] == 'a'
    assert items[4] == 'e'

    max_ = chr(65535)
    min_ = chr(0)

    items[0] = max_
    assert items[0] == max_

    items[0] = min_
    assert items[0] == min_

    items[-4] = max_
    assert items[-4] == max_

    items[-1] = min_
    assert items[-1] == min_

    with pytest.raises(TypeError):
        ob = Test.CharArrayTest()
        _ = ob.items["wrong"]

    with pytest.raises(TypeError):
        ob = Test.CharArrayTest()
        ob[0] = "wrong"


def test_int16_array():
    """Test Int16 arrays."""
    ob = Test.Int16ArrayTest()
    items = ob.items

    assert len(items) == 5

    assert items[0] == 0
    assert items[4] == 4

    max_ = 32767
    min_ = -32768

    items[0] = max_
    assert items[0] == max_

    items[0] = min_
    assert items[0] == min_

    items[-4] = max_
    assert items[-4] == max_

    items[-1] = min_
    assert items[-1] == min_

    with pytest.raises(OverflowError):
        ob = Test.Int16ArrayTest()
        ob.items[0] = max_ + 1

    with pytest.raises(OverflowError):
        ob = Test.Int16ArrayTest()
        ob.items[0] = min_ - 1

    with pytest.raises(TypeError):
        ob = Test.Int16ArrayTest()
        _ = ob.items["wrong"]

    with pytest.raises(TypeError):
        ob = Test.Int16ArrayTest()
        ob[0] = "wrong"


def test_int32_array():
    """Test Int32 arrays."""
    ob = Test.Int32ArrayTest()
    items = ob.items

    assert len(items) == 5

    assert items[0] == 0
    assert items[4] == 4

    max_ = 2147483647
    min_ = -2147483648

    items[0] = max_
    assert items[0] == max_

    items[0] = min_
    assert items[0] == min_

    items[-4] = max_
    assert items[-4] == max_

    items[-1] = min_
    assert items[-1] == min_

    with pytest.raises(OverflowError):
        ob = Test.Int32ArrayTest()
        ob.items[0] = max_ + 1

    with pytest.raises(OverflowError):
        ob = Test.Int32ArrayTest()
        ob.items[0] = min_ - 1

    with pytest.raises(TypeError):
        ob = Test.Int32ArrayTest()
        _ = ob.items["wrong"]

    with pytest.raises(TypeError):
        ob = Test.Int32ArrayTest()
        ob[0] = "wrong"


def test_int64_array():
    """Test Int64 arrays."""
    ob = Test.Int64ArrayTest()
    items = ob.items

    assert len(items) == 5

    assert items[0] == 0
    assert items[4] == 4

    max_ = 9223372036854775807
    min_ = -9223372036854775808

    items[0] = max_
    assert items[0] == max_

    items[0] = min_
    assert items[0] == min_

    items[-4] = max_
    assert items[-4] == max_

    items[-1] = min_
    assert items[-1] == min_

    with pytest.raises(OverflowError):
        ob = Test.Int64ArrayTest()
        ob.items[0] = max_ + 1

    with pytest.raises(OverflowError):
        ob = Test.Int64ArrayTest()
        ob.items[0] = min_ - 1

    with pytest.raises(TypeError):
        ob = Test.Int64ArrayTest()
        _ = ob.items["wrong"]

    with pytest.raises(TypeError):
        ob = Test.Int64ArrayTest()
        ob[0] = "wrong"


def test_uint16_array():
    """Test UInt16 arrays."""
    ob = Test.UInt16ArrayTest()
    items = ob.items

    assert len(items) == 5

    assert items[0] == 0
    assert items[4] == 4

    max_ = 65535
    min_ = 0

    items[0] = max_
    assert items[0] == max_

    items[0] = min_
    assert items[0] == min_

    items[-4] = max_
    assert items[-4] == max_

    items[-1] = min_
    assert items[-1] == min_

    with pytest.raises(OverflowError):
        ob = Test.UInt16ArrayTest()
        ob.items[0] = max_ + 1

    with pytest.raises(OverflowError):
        ob = Test.UInt16ArrayTest()
        ob.items[0] = min_ - 1

    with pytest.raises(TypeError):
        ob = Test.UInt16ArrayTest()
        _ = ob.items["wrong"]

    with pytest.raises(TypeError):
        ob = Test.UInt16ArrayTest()
        ob[0] = "wrong"


def test_uint32_array():
    """Test UInt32 arrays."""
    ob = Test.UInt32ArrayTest()
    items = ob.items

    assert len(items) == 5

    assert items[0] == 0
    assert items[4] == 4

    max_ = 4294967295
    min_ = 0

    items[0] = max_
    assert items[0] == max_

    items[0] = min_
    assert items[0] == min_

    items[-4] = max_
    assert items[-4] == max_

    items[-1] = min_
    assert items[-1] == min_

    with pytest.raises(OverflowError):
        ob = Test.UInt32ArrayTest()
        ob.items[0] = max_ + 1

    with pytest.raises(OverflowError):
        ob = Test.UInt32ArrayTest()
        ob.items[0] = min_ - 1

    with pytest.raises(TypeError):
        ob = Test.UInt32ArrayTest()
        _ = ob.items["wrong"]

    with pytest.raises(TypeError):
        ob = Test.UInt32ArrayTest()
        ob[0] = "wrong"


def test_uint64_array():
    """Test UInt64 arrays."""
    ob = Test.UInt64ArrayTest()
    items = ob.items

    assert len(items) == 5

    assert items[0] == 0
    assert items[4] == 4

    max_ = 18446744073709551615
    min_ = 0

    items[0] = max_
    assert items[0] == max_

    items[0] = min_
    assert items[0] == min_

    items[-4] = max_
    assert items[-4] == max_

    items[-1] = min_
    assert items[-1] == min_

    with pytest.raises(OverflowError):
        ob = Test.UInt64ArrayTest()
        ob.items[0] = max_ + 1

    with pytest.raises(OverflowError):
        ob = Test.UInt64ArrayTest()
        ob.items[0] = min_ - 1

    with pytest.raises(TypeError):
        ob = Test.UInt64ArrayTest()
        _ = ob.items["wrong"]

    with pytest.raises(TypeError):
        ob = Test.UInt64ArrayTest()
        ob[0] = "wrong"


def test_single_array():
    """Test Single arrays."""
    ob = Test.SingleArrayTest()
    items = ob.items

    assert len(items) == 5

    assert items[0] == 0.0
    assert items[4] == 4.0

    max_ = float32(3.402823e38)
    min_ = float32(-3.402823e38)

    items[0] = max_
    assert items[0] == max_

    items[0] = min_
    assert items[0] == min_

    items[-4] = max_
    assert items[-4] == max_

    items[-1] = min_
    assert items[-1] == min_

    with pytest.raises(TypeError):
        ob = Test.SingleArrayTest()
        _ = ob.items["wrong"]

    with pytest.raises(TypeError):
        ob = Test.SingleArrayTest()
        ob[0] = "wrong"


def test_double_array():
    """Test Double arrays."""
    ob = Test.DoubleArrayTest()
    items = ob.items

    assert len(items) == 5

    assert items[0] == 0.0
    assert items[4] == 4.0

    max_ = 1.7976931348623157e308
    min_ = -1.7976931348623157e308

    items[0] = max_
    assert items[0] == max_

    items[0] = min_
    assert items[0] == min_

    items[-4] = max_
    assert items[-4] == max_

    items[-1] = min_
    assert items[-1] == min_

    with pytest.raises(TypeError):
        ob = Test.DoubleArrayTest()
        _ = ob.items["wrong"]

    with pytest.raises(TypeError):
        ob = Test.DoubleArrayTest()
        ob[0] = "wrong"


def test_decimal_array():
    """Test Decimal arrays."""
    ob = Test.DecimalArrayTest()
    items = ob.items

    from System import Decimal
    max_d = Decimal.Parse("79228162514264337593543950335")
    min_d = Decimal.Parse("-79228162514264337593543950335")

    assert len(items) == 5

    assert items[0] == Decimal(0)
    assert items[4] == Decimal(4)

    items[0] = max_d
    assert items[0] == max_d

    items[0] = min_d
    assert items[0] == min_d

    items[-4] = max_d
    assert items[-4] == max_d

    items[-1] = min_d
    assert items[-1] == min_d

    with pytest.raises(TypeError):
        ob = Test.DecimalArrayTest()
        _ = ob.items["wrong"]

    with pytest.raises(TypeError):
        ob = Test.DecimalArrayTest()
        ob[0] = "wrong"


def test_string_array():
    """Test String arrays."""
    ob = Test.StringArrayTest()
    items = ob.items

    assert len(items) == 5

    assert items[0] == '0'
    assert items[4] == '4'

    items[0] = "spam"
    assert items[0] == "spam"

    items[0] = "eggs"
    assert items[0] == "eggs"

    items[-4] = "spam"
    assert items[-4] == "spam"

    items[-1] = "eggs"
    assert items[-1] == "eggs"

    with pytest.raises(TypeError):
        ob = Test.StringArrayTest()
        _ = ob.items["wrong"]

    with pytest.raises(TypeError):
        ob = Test.Int64ArrayTest()
        ob[0] = 0


def test_enum_array():
    """Test enum arrays."""
    from Python.Test import ShortEnum
    ob = Test.EnumArrayTest()
    items = ob.items

    assert len(items) == 5

    assert items[0] == ShortEnum.Zero
    assert items[4] == ShortEnum.Four

    items[0] = ShortEnum.Four
    assert items[0] == ShortEnum.Four

    items[0] = ShortEnum.Zero
    assert items[0] == ShortEnum.Zero

    items[-4] = ShortEnum.Four
    assert items[-4] == ShortEnum.Four

    items[-1] = ShortEnum.Zero
    assert items[-1] == ShortEnum.Zero

    with pytest.raises(TypeError):
        ob = Test.EnumArrayTest()
        ob.items[0] = 99

    with pytest.raises(TypeError):
        ob = Test.EnumArrayTest()
        _ = ob.items["wrong"]

    with pytest.raises(TypeError):
        ob = Test.EnumArrayTest()
        ob[0] = "wrong"


def test_object_array():
    """Test ob arrays."""
    from Python.Test import Spam
    ob = Test.ObjectArrayTest()
    items = ob.items

    assert len(items) == 5

    assert items[0].GetValue() == "0"
    assert items[4].GetValue() == "4"

    items[0] = Spam("4")
    assert items[0].GetValue() == "4"

    items[0] = Spam("0")
    assert items[0].GetValue() == "0"

    items[-4] = Spam("4")
    assert items[-4].GetValue() == "4"

    items[-1] = Spam("0")
    assert items[-1].GetValue() == "0"

    items[0] = 99
    assert items[0] == 99

    items[0] = None
    assert items[0] is None

    with pytest.raises(TypeError):
        ob = Test.ObjectArrayTest()
        _ = ob.items["wrong"]

    with pytest.raises(TypeError):
        ob = Test.ObjectArrayTest()
        ob.items["wrong"] = "wrong"


def test_null_array():
    """Test null arrays."""
    ob = Test.NullArrayTest()
    items = ob.items

    assert len(items) == 5

    assert items[0] is None
    assert items[4] is None

    items[0] = "spam"
    assert items[0] == "spam"

    items[0] = None
    assert items[0] is None

    items[-4] = "spam"
    assert items[-4] == "spam"

    items[-1] = None
    assert items[-1] is None

    empty = ob.empty
    assert len(empty) == 0

    with pytest.raises(TypeError):
        ob = Test.NullArrayTest()
        _ = ob.items["wrong"]


def test_interface_array():
    """Test interface arrays."""
    from Python.Test import Spam
    ob = Test.InterfaceArrayTest()
    items = ob.items

    assert len(items) == 5

    assert items[0].GetValue() == "0"
    assert items[4].GetValue() == "4"

    items[0] = Spam("4")
    assert items[0].GetValue() == "4"

    items[0] = Spam("0")
    assert items[0].GetValue() == "0"

    items[-4] = Spam("4")
    assert items[-4].GetValue() == "4"

    items[-1] = Spam("0")
    assert items[-1].GetValue() == "0"

    items[0] = None
    assert items[0] is None

    with pytest.raises(TypeError):
        ob = Test.InterfaceArrayTest()
        ob.items[0] = 99

    with pytest.raises(TypeError):
        ob = Test.InterfaceArrayTest()
        _ = ob.items["wrong"]

    with pytest.raises(TypeError):
        ob = Test.InterfaceArrayTest()
        ob.items["wrong"] = "wrong"


def test_typed_array():
    """Test typed arrays."""
    from Python.Test import Spam
    ob = Test.TypedArrayTest()
    items = ob.items

    assert len(items) == 5

    assert items[0].GetValue() == "0"
    assert items[4].GetValue() == "4"

    items[0] = Spam("4")
    assert items[0].GetValue() == "4"

    items[0] = Spam("0")
    assert items[0].GetValue() == "0"

    items[-4] = Spam("4")
    assert items[-4].GetValue() == "4"

    items[-1] = Spam("0")
    assert items[-1].GetValue() == "0"

    items[0] = None
    assert items[0] is None

    with pytest.raises(TypeError):
        ob = Test.TypedArrayTest()
        ob.items[0] = 99

    with pytest.raises(TypeError):
        ob = Test.TypedArrayTest()
        _ = ob.items["wrong"]

    with pytest.raises(TypeError):
        ob = Test.TypedArrayTest()
        ob.items["wrong"] = Spam("0")

    with pytest.raises(TypeError):
        ob = Test.TypedArrayTest()
        _ = ob.items[0.5]

    with pytest.raises(TypeError):
        ob = Test.TypedArrayTest()
        ob.items[0.5] = Spam("0")

def test_multi_dimensional_array():
    """Test multi-dimensional arrays."""
    ob = Test.MultiDimensionalArrayTest()
    items = ob.items

    assert len(items) == 25

    assert items[0, 0] == 0
    assert items[0, 1] == 1
    assert items[0, 2] == 2
    assert items[0, 3] == 3
    assert items[0, 4] == 4
    assert items[1, 0] == 5
    assert items[1, 1] == 6
    assert items[1, 2] == 7
    assert items[1, 3] == 8
    assert items[1, 4] == 9
    assert items[2, 0] == 10
    assert items[2, 1] == 11
    assert items[2, 2] == 12
    assert items[2, 3] == 13
    assert items[2, 4] == 14
    assert items[3, 0] == 15
    assert items[3, 1] == 16
    assert items[3, 2] == 17
    assert items[3, 3] == 18
    assert items[3, 4] == 19
    assert items[4, 0] == 20
    assert items[4, 1] == 21
    assert items[4, 2] == 22
    assert items[4, 3] == 23
    assert items[4, 4] == 24

    max_ = 2147483647
    min_ = -2147483648

    items[0, 0] = max_
    assert items[0, 0] == max_

    items[0, 0] = min_
    assert items[0, 0] == min_

    items[-4, 0] = max_
    assert items[-4, 0] == max_

    items[-1, -1] = min_
    assert items[-1, -1] == min_

    with pytest.raises(OverflowError):
        ob = Test.MultiDimensionalArrayTest()
        ob.items[0, 0] = max_ + 1

    with pytest.raises(OverflowError):
        ob = Test.MultiDimensionalArrayTest()
        ob.items[0, 0] = min_ - 1

    with pytest.raises(TypeError):
        ob = Test.MultiDimensionalArrayTest()
        _ = ob.items["wrong", 0]

    with pytest.raises(TypeError):
        ob = Test.MultiDimensionalArrayTest()
        ob.items[0, 0] = "wrong"

    with pytest.raises(TypeError):
        ob = Test.MultiDimensionalArrayTest()
        ob["0", 0] = 0

    with pytest.raises(TypeError):
        ob = Test.MultiDimensionalArrayTest()
        ob.items["0", 0] = 0

    with pytest.raises(TypeError):
        ob = Test.MultiDimensionalArrayTest()
        _ = ob.items[0.5, 0]

    with pytest.raises(TypeError):
        ob = Test.MultiDimensionalArrayTest()
        ob.items[0.5, 0] = 0

def test_array_iteration():
    """Test array iteration."""
    items = Test.Int32ArrayTest().items

    for i in items:
        assert (i > -1) and (i < 5)

    items = Test.NullArrayTest().items

    for i in items:
        assert i is None

    empty = Test.NullArrayTest().empty

    for i in empty:
        raise TypeError('iteration over empty array')


def test_tuple_array_conversion():
    """Test conversion of tuples to array arguments."""
    from Python.Test import ArrayConversionTest
    from Python.Test import Spam

    items = []
    for i in range(10):
        items.append(Spam(str(i)))
    items = tuple(items)

    result = ArrayConversionTest.EchoRange(items)
    assert result[0].__class__ == Spam
    assert len(result) == 10


def test_tuple_nested_array_conversion():
    """Test conversion of tuples to array-of-array arguments."""
    from Python.Test import ArrayConversionTest
    from Python.Test import Spam

    items = []
    for i in range(10):
        subs = []
        for _ in range(10):
            subs.append(Spam(str(i)))
        items.append(tuple(subs))
    items = tuple(items)

    result = ArrayConversionTest.EchoRangeAA(items)

    assert len(result) == 10
    assert len(result[0]) == 10
    assert result[0][0].__class__ == Spam


def test_list_array_conversion():
    """Test conversion of lists to array arguments."""
    from Python.Test import ArrayConversionTest
    from Python.Test import Spam

    items = []
    for i in range(10):
        items.append(Spam(str(i)))

    result = ArrayConversionTest.EchoRange(items)
    assert result[0].__class__ == Spam
    assert len(result) == 10


def test_list_nested_array_conversion():
    """Test conversion of lists to array-of-array arguments."""
    from Python.Test import ArrayConversionTest
    from Python.Test import Spam

    items = []
    for i in range(10):
        subs = []
        for _ in range(10):
            subs.append(Spam(str(i)))
        items.append(subs)

    result = ArrayConversionTest.EchoRangeAA(items)

    assert len(result) == 10
    assert len(result[0]) == 10
    assert result[0][0].__class__ == Spam


def test_sequence_array_conversion():
    """Test conversion of sequence-like obs to array arguments."""
    from Python.Test import ArrayConversionTest
    from Python.Test import Spam

    items = UserList()
    for i in range(10):
        items.append(Spam(str(i)))

    result = ArrayConversionTest.EchoRange(items)
    assert result[0].__class__ == Spam
    assert len(result) == 10


def test_sequence_nested_array_conversion():
    """Test conversion of sequences to array-of-array arguments."""
    from Python.Test import ArrayConversionTest
    from Python.Test import Spam

    items = UserList()
    for i in range(10):
        subs = UserList()
        for _ in range(10):
            subs.append(Spam(str(i)))
        items.append(subs)

    result = ArrayConversionTest.EchoRangeAA(items)

    assert len(result) == 10
    assert len(result[0]) == 10
    assert result[0][0].__class__ == Spam


def test_tuple_array_conversion_type_checking():
    """Test error handling for tuple conversion to array arguments."""
    from Python.Test import ArrayConversionTest
    from Python.Test import Spam

    # This should work, because null / None is a valid value in an
    # array of reference types.

    items = []
    for i in range(10):
        items.append(Spam(str(i)))
    items[1] = None
    items = tuple(items)

    result = ArrayConversionTest.EchoRange(items)

    assert result[0].__class__ == Spam
    assert result[1] is None
    assert len(result) == 10

    with pytest.raises(TypeError):
        temp = list(items)
        temp[1] = 1
        _ = ArrayConversionTest.EchoRange(tuple(temp))

    with pytest.raises(TypeError):
        temp = list(items)
        temp[1] = "spam"
        _ = ArrayConversionTest.EchoRange(tuple(temp))


def test_list_array_conversion_type_checking():
    """Test error handling for list conversion to array arguments."""
    from Python.Test import ArrayConversionTest
    from Python.Test import Spam

    # This should work, because null / None is a valid value in an
    # array of reference types.

    items = []
    for i in range(10):
        items.append(Spam(str(i)))
    items[1] = None

    result = ArrayConversionTest.EchoRange(items)

    assert result[0].__class__ == Spam
    assert result[1] is None
    assert len(result) == 10

    with pytest.raises(TypeError):
        items[1] = 1
        _ = ArrayConversionTest.EchoRange(items)

    with pytest.raises(TypeError):
        items[1] = "spam"
        _ = ArrayConversionTest.EchoRange(items)


def test_sequence_array_conversion_type_checking():
    """Test error handling for sequence conversion to array arguments."""
    from Python.Test import ArrayConversionTest
    from Python.Test import Spam

    # This should work, because null / None is a valid value in an
    # array of reference types.

    items = UserList()
    for i in range(10):
        items.append(Spam(str(i)))
    items[1] = None

    result = ArrayConversionTest.EchoRange(items)

    assert result[0].__class__ == Spam
    assert result[1] is None
    assert len(result) == 10

    with pytest.raises(TypeError):
        items[1] = 1
        _ = ArrayConversionTest.EchoRange(items)

    with pytest.raises(TypeError):
        items[1] = "spam"
        _ = ArrayConversionTest.EchoRange(items)


def test_md_array_conversion():
    """Test passing of multi-dimensional array arguments."""
    from Python.Test import ArrayConversionTest
    from Python.Test import Spam
    from System import Array

    # Currently, the runtime does not support automagic conversion of
    # Python sequences to true multi-dimensional arrays (though it
    # does support arrays-of-arrays). This test exists mostly as an
    # example of how a multi-dimensional array can be created and used
    # with managed code from Python.

    items = Array.CreateInstance(Spam, 5, 5)

    for i in range(5):
        for n in range(5):
            items.SetValue(Spam(str((i, n))), (i, n))

    result = ArrayConversionTest.EchoRangeMD(items)

    assert len(result) == 25
    assert result[0, 0].__class__ == Spam
    assert result[0, 0].__class__ == Spam


def test_boxed_value_type_mutation_result():
    """Test behavior of boxed value types."""

    # This test actually exists mostly as documentation of an important
    # concern when dealing with value types. Python does not have any
    # value type semantics that can be mapped to the CLR, so it is easy
    # to accidentally write code like the following which is not really
    # mutating value types in-place but changing boxed copies.

    from System import Array
    from Python.Test import Point

    items = Array.CreateInstance(Point, 5)

    for i in range(5):
        items[i] = Point(i, i)

    for i in range(5):
        # Boxed items, so set_attr will not change the array member.
        assert items[i].X == i
        assert items[i].Y == i
        items[i].X = i + 1
        items[i].Y = i + 1
        assert items[i].X == i
        assert items[i].Y == i

    for i in range(5):
        # Demonstrates the workaround that will change the members.
        assert items[i].X == i
        assert items[i].Y == i
        item = items[i]
        item.X = i + 1
        item.Y = i + 1
        items[i] = item
        assert items[i].X == i + 1
        assert items[i].Y == i + 1

def test_create_array_from_shape():
    from System import Array

    value = Array[int](3)
    assert value[1] == 0
    assert value.Length == 3

    value = Array[int](3, 4)
    assert value[1, 1] == 0
    assert value.GetLength(0) == 3
    assert value.GetLength(1) == 4

    with pytest.raises(ValueError):
        Array[int](-1)

    with pytest.raises(TypeError):
        Array[int]('1')

    with pytest.raises(ValueError):
        Array[int](-1, -1)

    with pytest.raises(TypeError):
        Array[int]('1', '1')

def test_special_array_creation():
    """Test using the Array[<type>] syntax for creating arrays."""
    from Python.Test import ISayHello1, InterfaceTest, ShortEnum
    from System import Array
    inst = InterfaceTest()

    value = Array[System.Boolean]([True, True])
    assert value[0] is True
    assert value[1] is True
    assert value.Length == 2

    value = Array[bool]([True, True])
    assert value[0] is True
    assert value[1] is True
    assert value.Length == 2

    value = Array[System.Byte]([0, 255])
    assert value[0] == 0
    assert value[1] == 255
    assert value.Length == 2

    value = Array[System.SByte]([0, 127])
    assert value[0] == 0
    assert value[1] == 127
    assert value.Length == 2

    value = Array[System.Char]([u'A', u'Z'])
    assert value[0] == u'A'
    assert value[1] == u'Z'
    assert value.Length == 2

    value = Array[System.Char]([0, 65535])
    assert value[0] == chr(0)
    assert value[1] == chr(65535)
    assert value.Length == 2

    value = Array[System.Int16]([0, 32767])
    assert value[0] == 0
    assert value[1] == 32767
    assert value.Length == 2

    value = Array[System.Int32]([0, 2147483647])
    assert value[0] == 0
    assert value[1] == 2147483647
    assert value.Length == 2

    value = Array[int]([0, 2147483647])
    assert value[0] == 0
    assert value[1] == 2147483647
    assert value.Length == 2

    value = Array[System.Int64]([0, 9223372036854775807])
    assert value[0] == 0
    assert value[1] == 9223372036854775807
    assert value.Length == 2

    value = Array[System.UInt16]([0, 65000])
    assert value[0] == 0
    assert value[1] == 65000
    assert value.Length == 2

    value = Array[System.UInt32]([0, 4294967295])
    assert value[0] == 0
    assert value[1] == 4294967295
    assert value.Length == 2

    value = Array[System.UInt64]([0, 18446744073709551615])
    assert value[0] == 0
    assert value[1] == 18446744073709551615
    assert value.Length == 2

    value = Array[System.Single]([0.0, 3.402823e38])
    assert value[0] == 0.0
    assert value[1] == System.Single(3.402823e38)
    assert value.Length == 2

    value = Array[System.Double]([0.0, 1.7976931348623157e308])
    assert value[0] == 0.0
    assert value[1] == 1.7976931348623157e308
    assert value.Length == 2

    value = Array[float]([0.0, 1.7976931348623157e308])
    assert value[0] == 0.0
    assert value[1] == 1.7976931348623157e308
    assert value.Length == 2

    value = Array[System.Decimal]([System.Decimal.Zero, System.Decimal.One])
    assert value[0] == System.Decimal.Zero
    assert value[1] == System.Decimal.One
    assert value.Length == 2

    value = Array[System.String](["one", "two"])
    assert value[0] == "one"
    assert value[1] == "two"
    assert value.Length == 2

    value = Array[str](["one", "two"])
    assert value[0] == "one"
    assert value[1] == "two"
    assert value.Length == 2

    value = Array[ShortEnum]([ShortEnum.Zero, ShortEnum.One])
    assert value[0] == ShortEnum.Zero
    assert value[1] == ShortEnum.One
    assert value.Length == 2

    value = Array[System.Object]([inst, inst])
    assert value[0].__class__ == inst.__class__
    assert value[1].__class__ == inst.__class__
    assert value.Length == 2

    value = Array[InterfaceTest]([inst, inst])
    assert value[0].__class__ == inst.__class__
    assert value[1].__class__ == inst.__class__
    assert value.Length == 2

    iface_class = ISayHello1(inst).__class__
    value = Array[ISayHello1]([inst, inst])
    assert value[0].__class__ == iface_class
    assert value[1].__class__ == iface_class
    assert value.Length == 2

    inst = System.Exception("badness")
    value = Array[System.Exception]([inst, inst])
    assert value[0].__class__ == inst.__class__
    assert value[1].__class__ == inst.__class__
    assert value.Length == 2


def test_array_abuse():
    """Test array abuse."""
    _class = Test.PublicArrayTest
    ob = Test.PublicArrayTest()

    with pytest.raises(AttributeError):
        del _class.__getitem__

    with pytest.raises(AttributeError):
        del ob.__getitem__

    with pytest.raises(AttributeError):
        del _class.__setitem__

    with pytest.raises(AttributeError):
        del ob.__setitem__

    with pytest.raises(TypeError):
        Test.PublicArrayTest.__getitem__(0, 0)

    with pytest.raises(AttributeError):
        Test.PublicArrayTest.__setitem__(0, 0, 0)

    with pytest.raises(KeyError):
        Test.PublicArrayTest.__dict__['__getitem__']

    with pytest.raises(KeyError):
        Test.PublicArrayTest.__dict__['__setitem__']


def test_iterator_to_array():
    from System import Array, String

    d = {"a": 1, "b": 2, "c": 3}
    keys_iterator = iter(d.keys())
    arr = Array[String](keys_iterator)

    Array.Sort(arr)

    assert arr[0] == "a"
    assert arr[1] == "b"
    assert arr[2] == "c"


def test_dict_keys_to_array():
    from System import Array, String

    d = {"a": 1, "b": 2, "c": 3}
    d_keys = d.keys()
    arr = Array[String](d_keys)

    Array.Sort(arr)

    assert arr[0] == "a"
    assert arr[1] == "b"
    assert arr[2] == "c"