Dataset_Construction/projects/iceberg/python/tests/test_schema.py

# 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.

from textwrap import dedent
from typing import Any, Dict, List

import pyarrow as pa
import pytest

from pyiceberg import schema
from pyiceberg.exceptions import ResolveError, ValidationError
from pyiceberg.schema import (
    Accessor,
    Schema,
    build_position_accessors,
    promote,
    prune_columns,
    sanitize_column_names,
)
from pyiceberg.table import UpdateSchema
from pyiceberg.typedef import EMPTY_DICT, StructProtocol
from pyiceberg.types import (
    BinaryType,
    BooleanType,
    DateType,
    DecimalType,
    DoubleType,
    FixedType,
    FloatType,
    IcebergType,
    IntegerType,
    ListType,
    LongType,
    MapType,
    NestedField,
    PrimitiveType,
    StringType,
    StructType,
    TimestampType,
    TimestamptzType,
    TimeType,
    UUIDType,
)

TEST_PRIMITIVE_TYPES = [
    BooleanType(),
    IntegerType(),
    LongType(),
    FloatType(),
    DoubleType(),
    DecimalType(10, 2),
    DecimalType(100, 2),
    StringType(),
    DateType(),
    TimeType(),
    TimestamptzType(),
    TimestampType(),
    BinaryType(),
    FixedType(16),
    FixedType(20),
    UUIDType(),
]


def test_schema_str(table_schema_simple: Schema) -> None:
    """Test casting a schema to a string"""
    assert str(table_schema_simple) == dedent(
        """\
    table {
      1: foo: optional string
      2: bar: required int
      3: baz: optional boolean
    }"""
    )


def test_schema_repr_single_field() -> None:
    """Test schema representation"""
    actual = repr(schema.Schema(NestedField(field_id=1, name="foo", field_type=StringType()), schema_id=1))
    expected = "Schema(NestedField(field_id=1, name='foo', field_type=StringType(), required=False), schema_id=1, identifier_field_ids=[])"
    assert expected == actual


def test_schema_repr_two_fields() -> None:
    """Test schema representation"""
    actual = repr(
        schema.Schema(
            NestedField(field_id=1, name="foo", field_type=StringType()),
            NestedField(field_id=2, name="bar", field_type=IntegerType(), required=False),
            schema_id=1,
        )
    )
    expected = "Schema(NestedField(field_id=1, name='foo', field_type=StringType(), required=False), NestedField(field_id=2, name='bar', field_type=IntegerType(), required=False), schema_id=1, identifier_field_ids=[])"
    assert expected == actual


def test_schema_raise_on_duplicate_names() -> None:
    """Test schema representation"""
    with pytest.raises(ValueError) as exc_info:
        schema.Schema(
            NestedField(field_id=1, name="foo", field_type=StringType(), required=False),
            NestedField(field_id=2, name="bar", field_type=IntegerType(), required=True),
            NestedField(field_id=3, name="baz", field_type=BooleanType(), required=False),
            NestedField(field_id=4, name="baz", field_type=BooleanType(), required=False),
            schema_id=1,
            identifier_field_ids=[2],
        )

    assert "Invalid schema, multiple fields for name baz: 3 and 4" in str(exc_info.value)


def test_schema_index_by_id_visitor(table_schema_nested: Schema) -> None:
    """Test index_by_id visitor function"""
    index = schema.index_by_id(table_schema_nested)
    assert index == {
        1: NestedField(field_id=1, name="foo", field_type=StringType(), required=False),
        2: NestedField(field_id=2, name="bar", field_type=IntegerType(), required=True),
        3: NestedField(field_id=3, name="baz", field_type=BooleanType(), required=False),
        4: NestedField(
            field_id=4,
            name="qux",
            field_type=ListType(element_id=5, element_type=StringType(), element_required=True),
            required=True,
        ),
        5: NestedField(field_id=5, name="element", field_type=StringType(), required=True),
        6: NestedField(
            field_id=6,
            name="quux",
            field_type=MapType(
                key_id=7,
                key_type=StringType(),
                value_id=8,
                value_type=MapType(key_id=9, key_type=StringType(), value_id=10, value_type=IntegerType(), value_required=True),
                value_required=True,
            ),
            required=True,
        ),
        7: NestedField(field_id=7, name="key", field_type=StringType(), required=True),
        9: NestedField(field_id=9, name="key", field_type=StringType(), required=True),
        8: NestedField(
            field_id=8,
            name="value",
            field_type=MapType(key_id=9, key_type=StringType(), value_id=10, value_type=IntegerType(), value_required=True),
            required=True,
        ),
        10: NestedField(field_id=10, name="value", field_type=IntegerType(), required=True),
        11: NestedField(
            field_id=11,
            name="location",
            field_type=ListType(
                element_id=12,
                element_type=StructType(
                    NestedField(field_id=13, name="latitude", field_type=FloatType(), required=False),
                    NestedField(field_id=14, name="longitude", field_type=FloatType(), required=False),
                ),
                element_required=True,
            ),
            required=True,
        ),
        12: NestedField(
            field_id=12,
            name="element",
            field_type=StructType(
                NestedField(field_id=13, name="latitude", field_type=FloatType(), required=False),
                NestedField(field_id=14, name="longitude", field_type=FloatType(), required=False),
            ),
            required=True,
        ),
        13: NestedField(field_id=13, name="latitude", field_type=FloatType(), required=False),
        14: NestedField(field_id=14, name="longitude", field_type=FloatType(), required=False),
        15: NestedField(
            field_id=15,
            name="person",
            field_type=StructType(
                NestedField(field_id=16, name="name", field_type=StringType(), required=False),
                NestedField(field_id=17, name="age", field_type=IntegerType(), required=True),
            ),
            required=False,
        ),
        16: NestedField(field_id=16, name="name", field_type=StringType(), required=False),
        17: NestedField(field_id=17, name="age", field_type=IntegerType(), required=True),
    }


def test_schema_index_by_name_visitor(table_schema_nested: Schema) -> None:
    """Test index_by_name visitor function"""
    table_schema_nested = schema.Schema(
        NestedField(field_id=1, name="foo", field_type=StringType(), required=False),
        NestedField(field_id=2, name="bar", field_type=IntegerType(), required=True),
        NestedField(field_id=3, name="baz", field_type=BooleanType(), required=False),
        NestedField(
            field_id=4,
            name="qux",
            field_type=ListType(element_id=5, element_type=StringType(), element_required=True),
            required=True,
        ),
        NestedField(
            field_id=6,
            name="quux",
            field_type=MapType(
                key_id=7,
                key_type=StringType(),
                value_id=8,
                value_type=MapType(key_id=9, key_type=StringType(), value_id=10, value_type=IntegerType(), value_required=True),
                value_required=True,
            ),
            required=True,
        ),
        NestedField(
            field_id=11,
            name="location",
            field_type=ListType(
                element_id=12,
                element_type=StructType(
                    NestedField(field_id=13, name="latitude", field_type=FloatType(), required=False),
                    NestedField(field_id=14, name="longitude", field_type=FloatType(), required=False),
                ),
                element_required=True,
            ),
            required=True,
        ),
        NestedField(
            field_id=15,
            name="person",
            field_type=StructType(
                NestedField(field_id=16, name="name", field_type=StringType(), required=False),
                NestedField(field_id=17, name="age", field_type=IntegerType(), required=True),
            ),
            required=False,
        ),
        schema_id=1,
        identifier_field_ids=[2],
    )
    index = schema.index_by_name(table_schema_nested)
    assert index == {
        "foo": 1,
        "bar": 2,
        "baz": 3,
        "qux": 4,
        "qux.element": 5,
        "quux": 6,
        "quux.key": 7,
        "quux.value": 8,
        "quux.value.key": 9,
        "quux.value.value": 10,
        "location": 11,
        "location.element": 12,
        "location.element.latitude": 13,
        "location.element.longitude": 14,
        "location.latitude": 13,
        "location.longitude": 14,
        "person": 15,
        "person.name": 16,
        "person.age": 17,
    }


def test_schema_find_column_name(table_schema_nested: Schema) -> None:
    """Test finding a column name using its field ID"""
    assert table_schema_nested.find_column_name(1) == "foo"
    assert table_schema_nested.find_column_name(2) == "bar"
    assert table_schema_nested.find_column_name(3) == "baz"
    assert table_schema_nested.find_column_name(4) == "qux"
    assert table_schema_nested.find_column_name(5) == "qux.element"
    assert table_schema_nested.find_column_name(6) == "quux"
    assert table_schema_nested.find_column_name(7) == "quux.key"
    assert table_schema_nested.find_column_name(8) == "quux.value"
    assert table_schema_nested.find_column_name(9) == "quux.value.key"
    assert table_schema_nested.find_column_name(10) == "quux.value.value"
    assert table_schema_nested.find_column_name(11) == "location"
    assert table_schema_nested.find_column_name(12) == "location.element"
    assert table_schema_nested.find_column_name(13) == "location.element.latitude"
    assert table_schema_nested.find_column_name(14) == "location.element.longitude"


def test_schema_find_column_name_on_id_not_found(table_schema_nested: Schema) -> None:
    """Test raising an error when a field ID cannot be found"""
    assert table_schema_nested.find_column_name(99) is None


def test_schema_find_column_name_by_id(table_schema_simple: Schema) -> None:
    """Test finding a column name given its field ID"""
    assert table_schema_simple.find_column_name(1) == "foo"
    assert table_schema_simple.find_column_name(2) == "bar"
    assert table_schema_simple.find_column_name(3) == "baz"


def test_schema_find_field_by_id(table_schema_simple: Schema) -> None:
    """Test finding a column using its field ID"""
    index = schema.index_by_id(table_schema_simple)

    column1 = index[1]
    assert isinstance(column1, NestedField)
    assert column1.field_id == 1
    assert column1.field_type == StringType()
    assert column1.required is False

    column2 = index[2]
    assert isinstance(column2, NestedField)
    assert column2.field_id == 2
    assert column2.field_type == IntegerType()
    assert column2.required is True

    column3 = index[3]
    assert isinstance(column3, NestedField)
    assert column3.field_id == 3
    assert column3.field_type == BooleanType()
    assert column3.required is False


def test_schema_find_field_by_id_raise_on_unknown_field(table_schema_simple: Schema) -> None:
    """Test raising when the field ID is not found among columns"""
    index = schema.index_by_id(table_schema_simple)
    with pytest.raises(Exception) as exc_info:
        _ = index[4]
    assert str(exc_info.value) == "4"


def test_schema_find_field_type_by_id(table_schema_simple: Schema) -> None:
    """Test retrieving a columns' type using its field ID"""
    index = schema.index_by_id(table_schema_simple)
    assert index[1] == NestedField(field_id=1, name="foo", field_type=StringType(), required=False)
    assert index[2] == NestedField(field_id=2, name="bar", field_type=IntegerType(), required=True)
    assert index[3] == NestedField(field_id=3, name="baz", field_type=BooleanType(), required=False)


def test_index_by_id_schema_visitor_raise_on_unregistered_type() -> None:
    """Test raising a NotImplementedError when an invalid type is provided to the index_by_id function"""
    with pytest.raises(NotImplementedError) as exc_info:
        schema.index_by_id("foo")  # type: ignore
    assert "Cannot visit non-type: foo" in str(exc_info.value)


def test_schema_find_field(table_schema_simple: Schema) -> None:
    """Test finding a field in a schema"""
    assert (
        table_schema_simple.find_field(1)
        == table_schema_simple.find_field("foo")
        == table_schema_simple.find_field("FOO", case_sensitive=False)
        == NestedField(field_id=1, name="foo", field_type=StringType(), required=False)
    )
    assert (
        table_schema_simple.find_field(2)
        == table_schema_simple.find_field("bar")
        == table_schema_simple.find_field("BAR", case_sensitive=False)
        == NestedField(field_id=2, name="bar", field_type=IntegerType(), required=True)
    )
    assert (
        table_schema_simple.find_field(3)
        == table_schema_simple.find_field("baz")
        == table_schema_simple.find_field("BAZ", case_sensitive=False)
        == NestedField(field_id=3, name="baz", field_type=BooleanType(), required=False)
    )


def test_schema_find_type(table_schema_simple: Schema) -> None:
    """Test finding the type of a column given its field ID"""
    assert (
        table_schema_simple.find_type(1)
        == table_schema_simple.find_type("foo")
        == table_schema_simple.find_type("FOO", case_sensitive=False)
        == StringType()
    )
    assert (
        table_schema_simple.find_type(2)
        == table_schema_simple.find_type("bar")
        == table_schema_simple.find_type("BAR", case_sensitive=False)
        == IntegerType()
    )
    assert (
        table_schema_simple.find_type(3)
        == table_schema_simple.find_type("baz")
        == table_schema_simple.find_type("BAZ", case_sensitive=False)
        == BooleanType()
    )


def test_build_position_accessors(table_schema_nested: Schema) -> None:
    accessors = build_position_accessors(table_schema_nested)
    assert accessors == {
        1: Accessor(position=0, inner=None),
        2: Accessor(position=1, inner=None),
        3: Accessor(position=2, inner=None),
        4: Accessor(position=3, inner=None),
        6: Accessor(position=4, inner=None),
        11: Accessor(position=5, inner=None),
        16: Accessor(position=6, inner=Accessor(position=0, inner=None)),
        17: Accessor(position=6, inner=Accessor(position=1, inner=None)),
    }


def test_build_position_accessors_with_struct(table_schema_nested: Schema) -> None:
    class TestStruct(StructProtocol):
        def __init__(self, pos: Dict[int, Any] = EMPTY_DICT):
            self._pos: Dict[int, Any] = pos

        def __setitem__(self, pos: int, value: Any) -> None:
            pass

        def __getitem__(self, pos: int) -> Any:
            return self._pos[pos]

    accessors = build_position_accessors(table_schema_nested)
    container = TestStruct({6: TestStruct({0: "name"})})
    inner_accessor = accessors.get(16)
    assert inner_accessor
    assert inner_accessor.get(container) == "name"


def test_serialize_schema(table_schema_simple: Schema) -> None:
    actual = table_schema_simple.model_dump_json()
    expected = """{"type":"struct","fields":[{"id":1,"name":"foo","type":"string","required":false},{"id":2,"name":"bar","type":"int","required":true},{"id":3,"name":"baz","type":"boolean","required":false}],"schema-id":1,"identifier-field-ids":[2]}"""
    assert actual == expected


def test_deserialize_schema(table_schema_simple: Schema) -> None:
    actual = Schema.model_validate_json(
        """{"type": "struct", "fields": [{"id": 1, "name": "foo", "type": "string", "required": false}, {"id": 2, "name": "bar", "type": "int", "required": true}, {"id": 3, "name": "baz", "type": "boolean", "required": false}], "schema-id": 1, "identifier-field-ids": [2]}"""
    )
    expected = table_schema_simple
    assert actual == expected


def test_sanitize() -> None:
    before_sanitized = Schema(
        NestedField(field_id=1, name="foo_field/bar", field_type=StringType(), required=True),
        NestedField(
            field_id=2,
            name="foo_list/bar",
            field_type=ListType(element_id=3, element_type=StringType(), element_required=True),
            required=True,
        ),
        NestedField(
            field_id=4,
            name="foo_map/bar",
            field_type=MapType(
                key_id=5,
                key_type=StringType(),
                value_id=6,
                value_type=MapType(key_id=7, key_type=StringType(), value_id=10, value_type=IntegerType(), value_required=True),
                value_required=True,
            ),
            required=True,
        ),
        NestedField(
            field_id=8,
            name="foo_struct/bar",
            field_type=StructType(
                NestedField(field_id=9, name="foo_struct_1/bar", field_type=StringType(), required=False),
                NestedField(field_id=10, name="foo_struct_2/bar", field_type=IntegerType(), required=True),
            ),
            required=False,
        ),
        NestedField(
            field_id=11,
            name="foo_list_2/bar",
            field_type=ListType(
                element_id=12,
                element_type=StructType(
                    NestedField(field_id=13, name="foo_list_2_1/bar", field_type=LongType(), required=True),
                    NestedField(field_id=14, name="foo_list_2_2/bar", field_type=LongType(), required=True),
                ),
                element_required=False,
            ),
            required=False,
        ),
        NestedField(
            field_id=15,
            name="foo_map_2/bar",
            field_type=MapType(
                key_id=16,
                value_id=17,
                key_type=StructType(
                    NestedField(field_id=18, name="foo_map_2_1/bar", field_type=StringType(), required=True),
                ),
                value_type=StructType(
                    NestedField(field_id=19, name="foo_map_2_2/bar", field_type=FloatType(), required=True),
                ),
                value_required=True,
            ),
            required=True,
        ),
        schema_id=1,
        identifier_field_ids=[1],
    )
    expected_schema = Schema(
        NestedField(field_id=1, name="foo_field_x2Fbar", field_type=StringType(), required=True),
        NestedField(
            field_id=2,
            name="foo_list_x2Fbar",
            field_type=ListType(element_id=3, element_type=StringType(), element_required=True),
            required=True,
        ),
        NestedField(
            field_id=4,
            name="foo_map_x2Fbar",
            field_type=MapType(
                key_id=5,
                key_type=StringType(),
                value_id=6,
                value_type=MapType(key_id=7, key_type=StringType(), value_id=10, value_type=IntegerType(), value_required=True),
                value_required=True,
            ),
            required=True,
        ),
        NestedField(
            field_id=8,
            name="foo_struct_x2Fbar",
            field_type=StructType(
                NestedField(field_id=9, name="foo_struct_1_x2Fbar", field_type=StringType(), required=False),
                NestedField(field_id=10, name="foo_struct_2_x2Fbar", field_type=IntegerType(), required=True),
            ),
            required=False,
        ),
        NestedField(
            field_id=11,
            name="foo_list_2_x2Fbar",
            field_type=ListType(
                element_id=12,
                element_type=StructType(
                    NestedField(field_id=13, name="foo_list_2_1_x2Fbar", field_type=LongType(), required=True),
                    NestedField(field_id=14, name="foo_list_2_2_x2Fbar", field_type=LongType(), required=True),
                ),
                element_required=False,
            ),
            required=False,
        ),
        NestedField(
            field_id=15,
            name="foo_map_2_x2Fbar",
            field_type=MapType(
                key_id=16,
                value_id=17,
                key_type=StructType(
                    NestedField(field_id=18, name="foo_map_2_1_x2Fbar", field_type=StringType(), required=True),
                ),
                value_type=StructType(
                    NestedField(field_id=19, name="foo_map_2_2_x2Fbar", field_type=FloatType(), required=True),
                ),
                value_required=True,
            ),
            required=True,
        ),
        schema_id=1,
        identifier_field_ids=[1],
    )
    assert sanitize_column_names(before_sanitized) == expected_schema


def test_prune_columns_string(table_schema_nested_with_struct_key_map: Schema) -> None:
    assert prune_columns(table_schema_nested_with_struct_key_map, {1}, False) == Schema(
        NestedField(field_id=1, name="foo", field_type=StringType(), required=True), schema_id=1, identifier_field_ids=[1]
    )


def test_prune_columns_string_full(table_schema_nested_with_struct_key_map: Schema) -> None:
    assert prune_columns(table_schema_nested_with_struct_key_map, {1}, True) == Schema(
        NestedField(field_id=1, name="foo", field_type=StringType(), required=True),
        schema_id=1,
        identifier_field_ids=[1],
    )


def test_prune_columns_list(table_schema_nested: Schema) -> None:
    assert prune_columns(table_schema_nested, {5}, False) == Schema(
        NestedField(
            field_id=4,
            name="qux",
            field_type=ListType(type="list", element_id=5, element_type=StringType(), element_required=True),
            required=True,
        ),
        schema_id=1,
        identifier_field_ids=[],
    )


def test_prune_columns_list_itself(table_schema_nested: Schema) -> None:
    with pytest.raises(ValueError) as exc_info:
        assert prune_columns(table_schema_nested, {4}, False)
    assert "Cannot explicitly project List or Map types, 4:qux of type list<string> was selected" in str(exc_info.value)


def test_prune_columns_list_full(table_schema_nested: Schema) -> None:
    assert prune_columns(table_schema_nested, {5}, True) == Schema(
        NestedField(
            field_id=4,
            name="qux",
            field_type=ListType(type="list", element_id=5, element_type=StringType(), element_required=True),
            required=True,
        ),
        schema_id=1,
        identifier_field_ids=[],
    )


def test_prune_columns_map(table_schema_nested: Schema) -> None:
    assert prune_columns(table_schema_nested, {9}, False) == Schema(
        NestedField(
            field_id=6,
            name="quux",
            field_type=MapType(
                type="map",
                key_id=7,
                key_type=StringType(),
                value_id=8,
                value_type=MapType(
                    type="map", key_id=9, key_type=StringType(), value_id=10, value_type=IntegerType(), value_required=True
                ),
                value_required=True,
            ),
            required=True,
        ),
        schema_id=1,
        identifier_field_ids=[],
    )


def test_prune_columns_map_itself(table_schema_nested: Schema) -> None:
    with pytest.raises(ValueError) as exc_info:
        assert prune_columns(table_schema_nested, {6}, False)
    assert "Cannot explicitly project List or Map types, 6:quux of type map<string, map<string, int>> was selected" in str(
        exc_info.value
    )


def test_prune_columns_map_full(table_schema_nested: Schema) -> None:
    assert prune_columns(table_schema_nested, {9}, True) == Schema(
        NestedField(
            field_id=6,
            name="quux",
            field_type=MapType(
                type="map",
                key_id=7,
                key_type=StringType(),
                value_id=8,
                value_type=MapType(
                    type="map", key_id=9, key_type=StringType(), value_id=10, value_type=IntegerType(), value_required=True
                ),
                value_required=True,
            ),
            required=True,
        ),
        schema_id=1,
        identifier_field_ids=[],
    )


def test_prune_columns_map_key(table_schema_nested: Schema) -> None:
    assert prune_columns(table_schema_nested, {10}, False) == Schema(
        NestedField(
            field_id=6,
            name="quux",
            field_type=MapType(
                type="map",
                key_id=7,
                key_type=StringType(),
                value_id=8,
                value_type=MapType(
                    type="map", key_id=9, key_type=StringType(), value_id=10, value_type=IntegerType(), value_required=True
                ),
                value_required=True,
            ),
            required=True,
        ),
        schema_id=1,
        identifier_field_ids=[],
    )


def test_prune_columns_struct(table_schema_nested: Schema) -> None:
    assert prune_columns(table_schema_nested, {16}, False) == Schema(
        NestedField(
            field_id=15,
            name="person",
            field_type=StructType(NestedField(field_id=16, name="name", field_type=StringType(), required=False)),
            required=False,
        ),
        schema_id=1,
        identifier_field_ids=[],
    )


def test_prune_columns_struct_full(table_schema_nested: Schema) -> None:
    actual = prune_columns(table_schema_nested, {16}, True)
    assert actual == Schema(
        NestedField(
            field_id=15,
            name="person",
            field_type=StructType(NestedField(field_id=16, name="name", field_type=StringType(), required=False)),
            required=False,
        ),
        schema_id=1,
        identifier_field_ids=[],
    )


def test_prune_columns_empty_struct() -> None:
    schema_empty_struct = Schema(
        NestedField(
            field_id=15,
            name="person",
            field_type=StructType(),
            required=False,
        )
    )
    assert prune_columns(schema_empty_struct, {15}, False) == Schema(
        NestedField(field_id=15, name="person", field_type=StructType(), required=False), schema_id=0, identifier_field_ids=[]
    )


def test_prune_columns_empty_struct_full() -> None:
    schema_empty_struct = Schema(
        NestedField(
            field_id=15,
            name="person",
            field_type=StructType(),
            required=False,
        )
    )
    assert prune_columns(schema_empty_struct, {15}, True) == Schema(
        NestedField(field_id=15, name="person", field_type=StructType(), required=False), schema_id=0, identifier_field_ids=[]
    )


def test_prune_columns_struct_in_map() -> None:
    table_schema_nested = Schema(
        NestedField(
            field_id=6,
            name="id_to_person",
            field_type=MapType(
                key_id=7,
                key_type=IntegerType(),
                value_id=8,
                value_type=StructType(
                    NestedField(field_id=10, name="name", field_type=StringType(), required=False),
                    NestedField(field_id=11, name="age", field_type=IntegerType(), required=True),
                ),
                value_required=True,
            ),
            required=True,
        ),
        schema_id=1,
        identifier_field_ids=[],
    )
    assert prune_columns(table_schema_nested, {11}, False) == Schema(
        NestedField(
            field_id=6,
            name="id_to_person",
            field_type=MapType(
                type="map",
                key_id=7,
                key_type=IntegerType(),
                value_id=8,
                value_type=StructType(NestedField(field_id=11, name="age", field_type=IntegerType(), required=True)),
                value_required=True,
            ),
            required=True,
        ),
        schema_id=1,
        identifier_field_ids=[],
    )


def test_prune_columns_struct_in_map_full() -> None:
    table_schema_nested = Schema(
        NestedField(
            field_id=6,
            name="id_to_person",
            field_type=MapType(
                key_id=7,
                key_type=IntegerType(),
                value_id=8,
                value_type=StructType(
                    NestedField(field_id=10, name="name", field_type=StringType(), required=False),
                    NestedField(field_id=11, name="age", field_type=IntegerType(), required=True),
                ),
                value_required=True,
            ),
            required=True,
        ),
        schema_id=1,
        identifier_field_ids=[],
    )
    assert prune_columns(table_schema_nested, {11}, True) == Schema(
        NestedField(
            field_id=6,
            name="id_to_person",
            field_type=MapType(
                type="map",
                key_id=7,
                key_type=IntegerType(),
                value_id=8,
                value_type=StructType(NestedField(field_id=11, name="age", field_type=IntegerType(), required=True)),
                value_required=True,
            ),
            required=True,
        ),
        schema_id=1,
        identifier_field_ids=[],
    )


def test_prune_columns_select_original_schema(table_schema_nested: Schema) -> None:
    ids = set(range(table_schema_nested.highest_field_id))
    assert prune_columns(table_schema_nested, ids, True) == table_schema_nested


def test_schema_select(table_schema_nested: Schema) -> None:
    assert table_schema_nested.select("bar", "baz") == Schema(
        NestedField(field_id=2, name="bar", field_type=IntegerType(), required=True),
        NestedField(field_id=3, name="baz", field_type=BooleanType(), required=False),
        schema_id=1,
        identifier_field_ids=[2],
    )


def test_schema_select_case_insensitive(table_schema_nested: Schema) -> None:
    assert table_schema_nested.select("BAZ", case_sensitive=False) == Schema(
        NestedField(field_id=3, name="baz", field_type=BooleanType(), required=False), schema_id=1, identifier_field_ids=[]
    )


def test_schema_select_cant_be_found(table_schema_nested: Schema) -> None:
    with pytest.raises(ValueError) as exc_info:
        table_schema_nested.select("BAZ", case_sensitive=True)
    assert "Could not find column: 'BAZ'" in str(exc_info.value)


def should_promote(file_type: IcebergType, read_type: IcebergType) -> bool:
    if isinstance(file_type, IntegerType) and isinstance(read_type, LongType):
        return True
    if isinstance(file_type, FloatType) and isinstance(read_type, DoubleType):
        return True
    if isinstance(file_type, StringType) and isinstance(read_type, BinaryType):
        return True
    if isinstance(file_type, BinaryType) and isinstance(read_type, StringType):
        return True
    if isinstance(file_type, DecimalType) and isinstance(read_type, DecimalType):
        return file_type.precision <= read_type.precision and file_type.scale == file_type.scale
    if isinstance(file_type, FixedType) and isinstance(read_type, UUIDType) and len(file_type) == 16:
        return True
    return False


def test_identifier_fields_fails(table_schema_nested_with_struct_key_map: Schema) -> None:
    with pytest.raises(ValueError) as exc_info:
        Schema(*table_schema_nested_with_struct_key_map.fields, schema_id=1, identifier_field_ids=[999])
    assert "Could not find field with id: 999" in str(exc_info.value)

    with pytest.raises(ValueError) as exc_info:
        Schema(*table_schema_nested_with_struct_key_map.fields, schema_id=1, identifier_field_ids=[11])
    assert "Identifier field 11 invalid: not a primitive type field" in str(exc_info.value)

    with pytest.raises(ValueError) as exc_info:
        Schema(*table_schema_nested_with_struct_key_map.fields, schema_id=1, identifier_field_ids=[3])
    assert "Identifier field 3 invalid: not a required field" in str(exc_info.value)

    with pytest.raises(ValueError) as exc_info:
        Schema(*table_schema_nested_with_struct_key_map.fields, schema_id=1, identifier_field_ids=[28])
    assert "Identifier field 28 invalid: must not be float or double field" in str(exc_info.value)

    with pytest.raises(ValueError) as exc_info:
        Schema(*table_schema_nested_with_struct_key_map.fields, schema_id=1, identifier_field_ids=[29])
    assert "Identifier field 29 invalid: must not be float or double field" in str(exc_info.value)

    with pytest.raises(ValueError) as exc_info:
        Schema(*table_schema_nested_with_struct_key_map.fields, schema_id=1, identifier_field_ids=[23])
    assert (
        f"Cannot add field zip as an identifier field: must not be nested in {table_schema_nested_with_struct_key_map.find_field('location')}"
        in str(exc_info.value)
    )

    with pytest.raises(ValueError) as exc_info:
        Schema(*table_schema_nested_with_struct_key_map.fields, schema_id=1, identifier_field_ids=[26])
    assert (
        f"Cannot add field x as an identifier field: must not be nested in {table_schema_nested_with_struct_key_map.find_field('points')}"
        in str(exc_info.value)
    )

    with pytest.raises(ValueError) as exc_info:
        Schema(*table_schema_nested_with_struct_key_map.fields, schema_id=1, identifier_field_ids=[17])
    assert (
        f"Cannot add field age as an identifier field: must not be nested in an optional field {table_schema_nested_with_struct_key_map.find_field('person')}"
        in str(exc_info.value)
    )


@pytest.mark.parametrize(
    "file_type",
    TEST_PRIMITIVE_TYPES,
)
@pytest.mark.parametrize(
    "read_type",
    TEST_PRIMITIVE_TYPES,
)
def test_promotion(file_type: IcebergType, read_type: IcebergType) -> None:
    if file_type == read_type:
        return
    if should_promote(file_type, read_type):
        assert promote(file_type, read_type) == read_type
    else:
        with pytest.raises(ResolveError):
            promote(file_type, read_type)


@pytest.fixture()
def primitive_fields() -> List[NestedField]:
    return [
        NestedField(field_id=1, name=str(primitive_type), field_type=primitive_type, required=False)
        for primitive_type in TEST_PRIMITIVE_TYPES
    ]


def test_add_top_level_primitives(primitive_fields: NestedField) -> None:
    for primitive_field in primitive_fields:
        new_schema = Schema(primitive_field)
        applied = UpdateSchema(transaction=None, schema=Schema()).union_by_name(new_schema)._apply()  # type: ignore
        assert applied == new_schema


def test_add_top_level_list_of_primitives(primitive_fields: NestedField) -> None:
    for primitive_type in TEST_PRIMITIVE_TYPES:
        new_schema = Schema(
            NestedField(
                field_id=1,
                name="aList",
                field_type=ListType(element_id=2, element_type=primitive_type, element_required=False),
                required=False,
            )
        )
        applied = UpdateSchema(transaction=None, schema=Schema()).union_by_name(new_schema)._apply()  # type: ignore
        assert applied.as_struct() == new_schema.as_struct()


def test_add_top_level_map_of_primitives(primitive_fields: NestedField) -> None:
    for primitive_type in TEST_PRIMITIVE_TYPES:
        new_schema = Schema(
            NestedField(
                field_id=1,
                name="aMap",
                field_type=MapType(
                    key_id=2, key_type=primitive_type, value_id=3, value_type=primitive_type, value_required=False
                ),
                required=False,
            )
        )
        applied = UpdateSchema(transaction=None, schema=Schema()).union_by_name(new_schema)._apply()  # type: ignore
        assert applied.as_struct() == new_schema.as_struct()


def test_add_top_struct_of_primitives(primitive_fields: NestedField) -> None:
    for primitive_type in TEST_PRIMITIVE_TYPES:
        new_schema = Schema(
            NestedField(
                field_id=1,
                name="aStruct",
                field_type=StructType(NestedField(field_id=2, name="primitive", field_type=primitive_type, required=False)),
                required=False,
            )
        )
        applied = UpdateSchema(transaction=None, schema=Schema()).union_by_name(new_schema)._apply()  # type: ignore
        assert applied.as_struct() == new_schema.as_struct()


def test_add_nested_primitive(primitive_fields: NestedField) -> None:
    for primitive_type in TEST_PRIMITIVE_TYPES:
        current_schema = Schema(NestedField(field_id=1, name="aStruct", field_type=StructType(), required=False))
        new_schema = Schema(
            NestedField(
                field_id=1,
                name="aStruct",
                field_type=StructType(NestedField(field_id=2, name="primitive", field_type=primitive_type, required=False)),
                required=False,
            )
        )
        applied = UpdateSchema(None, None, schema=current_schema).union_by_name(new_schema)._apply()  # type: ignore
        assert applied.as_struct() == new_schema.as_struct()


def _primitive_fields(types: List[PrimitiveType], start_id: int = 0) -> List[NestedField]:
    fields = []
    for iceberg_type in types:
        fields.append(NestedField(field_id=start_id, name=str(iceberg_type), field_type=iceberg_type, required=False))
        start_id = start_id + 1

    return fields


def test_add_nested_primitives(primitive_fields: NestedField) -> None:
    current_schema = Schema(NestedField(field_id=1, name="aStruct", field_type=StructType(), required=False))
    new_schema = Schema(
        NestedField(
            field_id=1, name="aStruct", field_type=StructType(*_primitive_fields(TEST_PRIMITIVE_TYPES, 2)), required=False
        )
    )
    applied = UpdateSchema(transaction=None, schema=current_schema).union_by_name(new_schema)._apply()  # type: ignore
    assert applied.as_struct() == new_schema.as_struct()


def test_add_nested_lists(primitive_fields: NestedField) -> None:
    new_schema = Schema(
        NestedField(
            field_id=1,
            name="aList",
            type=ListType(
                element_id=2,
                element_type=ListType(
                    element_id=3,
                    element_type=ListType(
                        element_id=4,
                        element_type=ListType(
                            element_id=5,
                            element_type=ListType(
                                element_id=6,
                                element_type=ListType(
                                    element_id=7,
                                    element_type=ListType(
                                        element_id=8,
                                        element_type=ListType(element_id=9, element_type=DecimalType(precision=11, scale=20)),
                                        element_required=False,
                                    ),
                                    element_required=False,
                                ),
                                element_required=False,
                            ),
                            element_required=False,
                        ),
                        element_required=False,
                    ),
                    element_required=False,
                ),
                element_required=False,
            ),
            required=False,
        )
    )
    applied = UpdateSchema(transaction=None, schema=Schema()).union_by_name(new_schema)._apply()  # type: ignore
    assert applied.as_struct() == new_schema.as_struct()


def test_add_nested_struct(primitive_fields: NestedField) -> None:
    new_schema = Schema(
        NestedField(
            field_id=1,
            name="struct1",
            type=StructType(
                NestedField(
                    field_id=2,
                    name="struct2",
                    type=StructType(
                        NestedField(
                            field_id=3,
                            name="struct3",
                            type=StructType(
                                NestedField(
                                    field_id=4,
                                    name="struct4",
                                    type=StructType(
                                        NestedField(
                                            field_id=5,
                                            name="struct5",
                                            type=StructType(
                                                NestedField(
                                                    field_id=6,
                                                    name="struct6",
                                                    type=StructType(
                                                        NestedField(field_id=7, name="aString", field_type=StringType())
                                                    ),
                                                    required=False,
                                                )
                                            ),
                                            required=False,
                                        )
                                    ),
                                    required=False,
                                )
                            ),
                            required=False,
                        )
                    ),
                    required=False,
                )
            ),
            required=False,
        )
    )
    applied = UpdateSchema(transaction=None, schema=Schema()).union_by_name(new_schema)._apply()  # type: ignore
    assert applied.as_struct() == new_schema.as_struct()


def test_add_nested_maps(primitive_fields: NestedField) -> None:
    new_schema = Schema(
        NestedField(
            field_id=1,
            name="struct",
            field_type=MapType(
                key_id=2,
                value_id=3,
                key_type=StringType(),
                value_type=MapType(
                    key_id=4,
                    value_id=5,
                    key_type=StringType(),
                    value_type=MapType(
                        key_id=6,
                        value_id=7,
                        key_type=StringType(),
                        value_type=MapType(
                            key_id=8,
                            value_id=9,
                            key_type=StringType(),
                            value_type=MapType(
                                key_id=10,
                                value_id=11,
                                key_type=StringType(),
                                value_type=MapType(key_id=12, value_id=13, key_type=StringType(), value_type=StringType()),
                                value_required=False,
                            ),
                            value_required=False,
                        ),
                        value_required=False,
                    ),
                    value_required=False,
                ),
                value_required=False,
            ),
            required=False,
        )
    )
    applied = UpdateSchema(transaction=None, schema=Schema()).union_by_name(new_schema)._apply()  # type: ignore
    assert applied.as_struct() == new_schema.as_struct()


def test_detect_invalid_top_level_list() -> None:
    current_schema = Schema(
        NestedField(
            field_id=1,
            name="aList",
            field_type=ListType(element_id=2, element_type=StringType(), element_required=False),
            required=False,
        )
    )
    new_schema = Schema(
        NestedField(
            field_id=1,
            name="aList",
            field_type=ListType(element_id=2, element_type=DoubleType(), element_required=False),
            required=False,
        )
    )

    with pytest.raises(ValidationError, match="Cannot change column type: aList.element: string -> double"):
        _ = UpdateSchema(transaction=None, schema=current_schema).union_by_name(new_schema)._apply()  # type: ignore


def test_detect_invalid_top_level_maps() -> None:
    current_schema = Schema(
        NestedField(
            field_id=1,
            name="aMap",
            field_type=MapType(key_id=2, value_id=3, key_type=StringType(), value_type=StringType(), value_required=False),
            required=False,
        )
    )
    new_schema = Schema(
        NestedField(
            field_id=1,
            name="aMap",
            field_type=MapType(key_id=2, value_id=3, key_type=UUIDType(), value_type=StringType(), value_required=False),
            required=False,
        )
    )

    with pytest.raises(ValidationError, match="Cannot change column type: aMap.key: string -> uuid"):
        _ = UpdateSchema(transaction=None, schema=current_schema).union_by_name(new_schema)._apply()  # type: ignore


def test_promote_float_to_double() -> None:
    current_schema = Schema(NestedField(field_id=1, name="aCol", field_type=FloatType(), required=False))
    new_schema = Schema(NestedField(field_id=1, name="aCol", field_type=DoubleType(), required=False))

    applied = UpdateSchema(transaction=None, schema=current_schema).union_by_name(new_schema)._apply()  # type: ignore

    assert applied.as_struct() == new_schema.as_struct()
    assert len(applied.fields) == 1
    assert isinstance(applied.fields[0].field_type, DoubleType)


def test_detect_invalid_promotion_double_to_float() -> None:
    current_schema = Schema(NestedField(field_id=1, name="aCol", field_type=DoubleType(), required=False))
    new_schema = Schema(NestedField(field_id=1, name="aCol", field_type=FloatType(), required=False))

    with pytest.raises(ValidationError, match="Cannot change column type: aCol: double -> float"):
        _ = UpdateSchema(transaction=None, schema=current_schema).union_by_name(new_schema)._apply()  # type: ignore


# decimal(P,S) Fixed-point decimal; precision P, scale S -> Scale is fixed [1],
# precision must be 38 or less
def test_type_promote_decimal_to_fixed_scale_with_wider_precision() -> None:
    current_schema = Schema(NestedField(field_id=1, name="aCol", field_type=DecimalType(precision=20, scale=1), required=False))
    new_schema = Schema(NestedField(field_id=1, name="aCol", field_type=DecimalType(precision=22, scale=1), required=False))

    applied = UpdateSchema(transaction=None, schema=current_schema).union_by_name(new_schema)._apply()  # type: ignore

    assert applied.as_struct() == new_schema.as_struct()
    assert len(applied.fields) == 1
    field = applied.fields[0]
    decimal_type = field.field_type
    assert isinstance(decimal_type, DecimalType)
    assert decimal_type.precision == 22
    assert decimal_type.scale == 1


def test_add_nested_structs(primitive_fields: NestedField) -> None:
    schema = Schema(
        NestedField(
            field_id=1,
            name="struct1",
            field_type=StructType(
                NestedField(
                    field_id=2,
                    name="struct2",
                    field_type=StructType(
                        NestedField(
                            field_id=3,
                            name="list",
                            field_type=ListType(
                                element_id=4,
                                element_type=StructType(
                                    NestedField(field_id=5, name="value", field_type=StringType(), required=False)
                                ),
                                element_required=False,
                            ),
                            required=False,
                        )
                    ),
                    required=False,
                )
            ),
            required=False,
        )
    )
    new_schema = Schema(
        NestedField(
            field_id=1,
            name="struct1",
            field_type=StructType(
                NestedField(
                    field_id=2,
                    name="struct2",
                    field_type=StructType(
                        NestedField(
                            field_id=3,
                            name="list",
                            field_type=ListType(
                                element_id=4,
                                element_type=StructType(
                                    NestedField(field_id=5, name="time", field_type=TimeType(), required=False)
                                ),
                                element_required=False,
                            ),
                            required=False,
                        )
                    ),
                    required=False,
                )
            ),
            required=False,
        )
    )
    applied = UpdateSchema(transaction=None, schema=schema).union_by_name(new_schema)._apply()  # type: ignore

    expected = Schema(
        NestedField(
            field_id=1,
            name="struct1",
            field_type=StructType(
                NestedField(
                    field_id=2,
                    name="struct2",
                    field_type=StructType(
                        NestedField(
                            field_id=3,
                            name="list",
                            field_type=ListType(
                                element_id=4,
                                element_type=StructType(
                                    NestedField(field_id=5, name="value", field_type=StringType(), required=False),
                                    NestedField(field_id=6, name="time", field_type=TimeType(), required=False),
                                ),
                                element_required=False,
                            ),
                            required=False,
                        )
                    ),
                    required=False,
                )
            ),
            required=False,
        )
    )

    assert applied.as_struct() == expected.as_struct()


def test_replace_list_with_primitive() -> None:
    current_schema = Schema(NestedField(field_id=1, name="aCol", field_type=ListType(element_id=2, element_type=StringType())))
    new_schema = Schema(NestedField(field_id=1, name="aCol", field_type=StringType()))

    with pytest.raises(ValidationError, match="Cannot change column type: list<string> is not a primitive"):
        _ = UpdateSchema(transaction=None, schema=current_schema).union_by_name(new_schema)._apply()  # type: ignore


def test_mirrored_schemas() -> None:
    current_schema = Schema(
        NestedField(9, "struct1", StructType(NestedField(8, "string1", StringType(), required=False)), required=False),
        NestedField(6, "list1", ListType(element_id=7, element_type=StringType(), element_required=False), required=False),
        NestedField(5, "string2", StringType(), required=False),
        NestedField(4, "string3", StringType(), required=False),
        NestedField(3, "string4", StringType(), required=False),
        NestedField(2, "string5", StringType(), required=False),
        NestedField(1, "string6", StringType(), required=False),
    )
    mirrored_schema = Schema(
        NestedField(1, "struct1", StructType(NestedField(2, "string1", StringType(), required=False))),
        NestedField(3, "list1", ListType(element_id=4, element_type=StringType(), element_required=False), required=False),
        NestedField(5, "string2", StringType(), required=False),
        NestedField(6, "string3", StringType(), required=False),
        NestedField(7, "string4", StringType(), required=False),
        NestedField(8, "string5", StringType(), required=False),
        NestedField(9, "string6", StringType(), required=False),
    )

    applied = UpdateSchema(transaction=None, schema=current_schema).union_by_name(mirrored_schema)._apply()  # type: ignore

    assert applied.as_struct() == current_schema.as_struct()


def test_add_new_top_level_struct() -> None:
    current_schema = Schema(
        NestedField(
            1,
            "map1",
            MapType(
                key_id=2,
                value_id=3,
                key_type=StringType(),
                value_type=ListType(
                    element_id=4,
                    element_type=StructType(NestedField(field_id=5, name="string", field_type=StringType(), required=False)),
                ),
                value_required=False,
            ),
        )
    )
    observed_schema = Schema(
        NestedField(
            1,
            "map1",
            MapType(
                key_id=2,
                value_id=3,
                key_type=StringType(),
                value_type=ListType(
                    element_id=4,
                    element_type=StructType(NestedField(field_id=5, name="string", field_type=StringType(), required=False)),
                ),
                value_required=False,
            ),
        ),
        NestedField(
            field_id=6,
            name="struct1",
            field_type=StructType(
                NestedField(
                    field_id=7,
                    name="d1",
                    field_type=StructType(NestedField(field_id=8, name="d2", field_type=StringType(), required=False)),
                    required=False,
                )
            ),
            required=False,
        ),
    )

    applied = UpdateSchema(transaction=None, schema=current_schema).union_by_name(observed_schema)._apply()  # type: ignore

    assert applied.as_struct() == observed_schema.as_struct()


def test_append_nested_struct() -> None:
    current_schema = Schema(
        NestedField(
            field_id=1,
            name="s1",
            field_type=StructType(
                NestedField(
                    field_id=2,
                    name="s2",
                    field_type=StructType(
                        NestedField(
                            field_id=3,
                            name="s3",
                            field_type=StructType(NestedField(field_id=4, name="s4", field_type=StringType(), required=False)),
                        )
                    ),
                    required=False,
                )
            ),
        )
    )
    observed_schema = Schema(
        NestedField(
            field_id=1,
            name="s1",
            field_type=StructType(
                NestedField(
                    field_id=2,
                    name="s2",
                    field_type=StructType(
                        NestedField(
                            field_id=3,
                            name="s3",
                            field_type=StructType(NestedField(field_id=4, name="s4", field_type=StringType(), required=False)),
                            required=False,
                        ),
                        NestedField(
                            field_id=5,
                            name="repeat",
                            field_type=StructType(
                                NestedField(
                                    field_id=6,
                                    name="s1",
                                    field_type=StructType(
                                        NestedField(
                                            field_id=7,
                                            name="s2",
                                            field_type=StructType(
                                                NestedField(
                                                    field_id=8,
                                                    name="s3",
                                                    field_type=StructType(
                                                        NestedField(field_id=9, name="s4", field_type=StringType())
                                                    ),
                                                    required=False,
                                                )
                                            ),
                                            required=False,
                                        )
                                    ),
                                    required=False,
                                )
                            ),
                            required=False,
                        ),
                        required=False,
                    ),
                    required=False,
                )
            ),
            required=False,
        )
    )

    applied = UpdateSchema(transaction=None, schema=current_schema).union_by_name(observed_schema)._apply()  # type: ignore

    assert applied.as_struct() == observed_schema.as_struct()


def test_append_nested_lists() -> None:
    current_schema = Schema(
        NestedField(
            field_id=1,
            name="s1",
            field_type=StructType(
                NestedField(
                    field_id=2,
                    name="s2",
                    field_type=StructType(
                        NestedField(
                            field_id=3,
                            name="s3",
                            field_type=StructType(
                                NestedField(
                                    field_id=4,
                                    name="list1",
                                    field_type=ListType(element_id=5, element_type=StringType(), element_required=False),
                                    required=False,
                                )
                            ),
                            required=False,
                        )
                    ),
                    required=False,
                )
            ),
            required=False,
        )
    )

    observed_schema = Schema(
        NestedField(
            field_id=1,
            name="s1",
            field_type=StructType(
                NestedField(
                    field_id=2,
                    name="s2",
                    field_type=StructType(
                        NestedField(
                            field_id=3,
                            name="s3",
                            field_type=StructType(
                                NestedField(
                                    field_id=4,
                                    name="list2",
                                    field_type=ListType(element_id=5, element_type=StringType(), element_required=False),
                                    required=False,
                                )
                            ),
                            required=False,
                        )
                    ),
                    required=False,
                )
            ),
            required=False,
        )
    )
    union = UpdateSchema(transaction=None, schema=current_schema).union_by_name(observed_schema)._apply()  # type: ignore

    expected = Schema(
        NestedField(
            field_id=1,
            name="s1",
            field_type=StructType(
                NestedField(
                    field_id=2,
                    name="s2",
                    field_type=StructType(
                        NestedField(
                            field_id=3,
                            name="s3",
                            field_type=StructType(
                                NestedField(
                                    field_id=4,
                                    name="list1",
                                    field_type=ListType(element_id=5, element_type=StringType(), element_required=False),
                                    required=False,
                                ),
                                NestedField(
                                    field_id=6,
                                    name="list2",
                                    field_type=ListType(element_id=7, element_type=StringType(), element_required=False),
                                    required=False,
                                ),
                            ),
                            required=False,
                        )
                    ),
                    required=False,
                )
            ),
            required=False,
        )
    )

    assert union.as_struct() == expected.as_struct()


def test_union_with_pa_schema(primitive_fields: NestedField) -> None:
    base_schema = Schema(NestedField(field_id=1, name="foo", field_type=StringType(), required=True))

    pa_schema = pa.schema([
        pa.field("foo", pa.string(), nullable=False),
        pa.field("bar", pa.int32(), nullable=True),
        pa.field("baz", pa.bool_(), nullable=True),
    ])

    new_schema = UpdateSchema(transaction=None, schema=base_schema).union_by_name(pa_schema)._apply()  # type: ignore

    expected_schema = Schema(
        NestedField(field_id=1, name="foo", field_type=StringType(), required=True),
        NestedField(field_id=2, name="bar", field_type=IntegerType(), required=False),
        NestedField(field_id=3, name="baz", field_type=BooleanType(), required=False),
    )

    assert new_schema == expected_schema


def test_arrow_schema() -> None:
    base_schema = Schema(
        NestedField(field_id=1, name="foo", field_type=StringType(), required=True),
        NestedField(field_id=2, name="bar", field_type=IntegerType(), required=False),
        NestedField(field_id=3, name="baz", field_type=BooleanType(), required=False),
    )

    expected_schema = pa.schema([
        pa.field("foo", pa.string(), nullable=False),
        pa.field("bar", pa.int32(), nullable=True),
        pa.field("baz", pa.bool_(), nullable=True),
    ])

    assert base_schema.as_arrow() == expected_schema