AlenkaF commented on code in PR #55264: URL: https://github.com/apache/arrow/pull/55264#discussion_r4510912544
########## python/pyarrow-stubs/tests/test_types.py: ########## @@ -0,0 +1,229 @@ +# Licensed to the Apache Software Foundation (ASF) under one +# or more contributor license agreements. See the NOTICE file +# distributed with this work for additional information +# regarding copyright ownership. The ASF licenses this file +# to you under the Apache License, Version 2.0 (the +# "License"); you may not use this file except in compliance +# with the License. You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, +# software distributed under the License is distributed on an +# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +# KIND, either express or implied. See the License for the +# specific language governing permissions and limitations +# under the License. +# mypy: warn-unused-ignores + +from collections.abc import Hashable, Iterator +from typing import TYPE_CHECKING, Literal + +import pyarrow.lib as lib +import pyarrow.types as types +from typing_extensions import CapsuleType + +from _check import TYPE_CHECKING_INVALID_USAGE, assert_type, check + +if TYPE_CHECKING: + # The stubs have a class per primitive type, but at runtime the + # factories return plain DataType instances, so these can only be + # referred to from type checking code. + from pyarrow.lib import ( # noqa: F401 + BoolType, + Int8Type, + Int16Type, + Int32Type, + Int64Type, + StringType, + UInt8Type, + UInt16Type, + UInt32Type, + UInt64Type, + ) + + IntegerType = ( + UInt8Type | Int8Type | UInt16Type | Int16Type + | UInt32Type | Int32Type | UInt64Type | Int64Type + ) + + +def _erase(t: lib.DataType) -> lib.DataType: + # Hide the precise type, so we can test narrowing by the is_* functions. + return t + + +def test_primitive_factories() -> None: + check(assert_type(lib.bool_(), "BoolType"), lib.DataType) + check(assert_type(lib.int32(), "Int32Type"), lib.DataType) + check(assert_type(lib.string(), "StringType"), lib.DataType) + check(assert_type(lib.utf8(), "StringType"), lib.DataType) + + +def test_temporal_types() -> None: + ts = lib.timestamp("ms", tz="UTC") + check(assert_type(ts, lib.TimestampType), lib.TimestampType) + check(assert_type(ts.unit, Literal["s", "ms", "us", "ns"]), str) + check(assert_type(ts.tz, str | None), str) + + check(assert_type(lib.time32("s").unit, Literal["s", "ms"]), str) + check(assert_type(lib.time64("ns").unit, Literal["us", "ns"]), str) + check(assert_type(lib.duration("us"), lib.DurationType), lib.DurationType) + + +def test_decimal_types() -> None: + dec = lib.decimal128(10, 2) + check(assert_type(dec, lib.Decimal128Type), lib.Decimal128Type) + check(assert_type(dec.precision, int), int) + check(assert_type(dec.scale, int), int) + + +def test_list_types() -> None: + lst = lib.list_(lib.int32()) + check(assert_type(lst, lib.ListType), lib.ListType) + check(assert_type(lst.value_type, lib.DataType), lib.DataType) + check(assert_type(lst.value_field, lib.Field), lib.Field) + + # With an explicit list_size we can't tell statically whether it is -1. + fixed = lib.list_(lib.int32(), 2) + check(assert_type(fixed, lib.ListType | lib.FixedSizeListType), + lib.FixedSizeListType) + + check(assert_type(lib.large_list(lib.int32()), lib.LargeListType), + lib.LargeListType) + check(assert_type(lib.list_view(lib.int32()), lib.ListViewType), + lib.ListViewType) + + +def test_dictionary_type() -> None: + dict_type = lib.dictionary(lib.int8(), lib.string()) + check(assert_type(dict_type, lib.DictionaryType), lib.DictionaryType) + check(assert_type(dict_type.ordered, bool), bool) + check(assert_type(dict_type.value_type, lib.DataType), lib.DataType) + check(assert_type(dict_type.index_type, "IntegerType"), lib.DataType) + + +def test_map_and_run_end_encoded_types() -> None: + map_type = lib.map_(lib.string(), lib.int64()) + check(assert_type(map_type, lib.MapType), lib.MapType) + check(assert_type(map_type.key_type, lib.DataType), lib.DataType) + check(assert_type(map_type.keys_sorted, bool), bool) + + ree = lib.run_end_encoded(lib.int16(), lib.string()) + check(assert_type(ree, lib.RunEndEncodedType), lib.RunEndEncodedType) + check(assert_type(ree.run_end_type, "Int16Type | Int32Type | Int64Type"), + lib.DataType) + + +def test_types_enum() -> None: + assert lib.int64().id == types.TypesEnum.INT64 + assert lib.list_(lib.int8()).id == types.TypesEnum.LIST + assert (lib.month_day_nano_interval().id + == types.TypesEnum.INTERVAL_MONTH_DAY_NANO) + + +def test_data_type_hashable() -> None: + data_type: Hashable = lib.int32() + check(assert_type(hash(data_type), int), int) + + +def test_field() -> None: + field = lib.field("a", lib.int32()) + check(assert_type(field, lib.Field), lib.Field) + check(assert_type(field.name, str), str) + check(assert_type(field.type, lib.DataType), lib.DataType) + check(assert_type(field.nullable, bool), bool) + check(assert_type(field.with_nullable(False), lib.Field), lib.Field) + check(assert_type(lib.field("b", "string"), lib.Field), lib.Field) + Review Comment: Done: 88960444bee67c801b4700b1b62c0e9b18de1f8b -- This is an automated message from the Apache Git Service. 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