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// 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.
using Apache.Arrow.Types;
using System;
using System.Collections.Generic;
using System.Linq;
using Xunit;
namespace Apache.Arrow.Tests
{
public class ArrayBuilderTests
{
// TODO: Test various builder invariants (Append, AppendRange, Clear, Resize, Reserve, etc)
[Fact]
public void PrimitiveArrayBuildersProduceExpectedArray()
{
TestArrayBuilder<Int8Array, Int8Array.Builder>(x => x.Append(10).Append(20).Append(30));
TestArrayBuilder<Int16Array, Int16Array.Builder>(x => x.Append(10).Append(20).Append(30));
TestArrayBuilder<Int32Array, Int32Array.Builder>(x => x.Append(10).Append(20).Append(30));
TestArrayBuilder<Int64Array, Int64Array.Builder>(x => x.Append(10).Append(20).Append(30));
TestArrayBuilder<UInt8Array, UInt8Array.Builder>(x => x.Append(10).Append(20).Append(30));
TestArrayBuilder<UInt16Array, UInt16Array.Builder>(x => x.Append(10).Append(20).Append(30));
TestArrayBuilder<UInt32Array, UInt32Array.Builder>(x => x.Append(10).Append(20).Append(30));
TestArrayBuilder<UInt64Array, UInt64Array.Builder>(x => x.Append(10).Append(20).Append(30));
TestArrayBuilder<FloatArray, FloatArray.Builder>(x => x.Append(10).Append(20).Append(30));
TestArrayBuilder<DoubleArray, DoubleArray.Builder>(x => x.Append(10).Append(20).Append(30));
}
[Fact]
public void PrimitiveArrayBuildersProduceExpectedArrayWithNulls()
{
TestArrayBuilder<Int8Array, Int8Array.Builder>(x => x.Append(123).AppendNull().AppendNull().Append(127), 4, 2, 0x09);
TestArrayBuilder<Int16Array, Int16Array.Builder>(x => x.Append(123).AppendNull().AppendNull().Append(456), 4, 2, 0x09);
TestArrayBuilder<Int32Array, Int32Array.Builder>(x => x.Append(123).AppendNull().AppendNull().Append(456), 4, 2, 0x09);
TestArrayBuilder<Int64Array, Int64Array.Builder>(x => x.Append(123).AppendNull().AppendNull().Append(456), 4, 2, 0x09);
TestArrayBuilder<UInt8Array, UInt8Array.Builder>(x => x.Append(123).AppendNull().AppendNull().Append(127), 4, 2, 0x09);
TestArrayBuilder<UInt16Array, UInt16Array.Builder>(x => x.Append(123).AppendNull().AppendNull().Append(456), 4, 2, 0x09);
TestArrayBuilder<UInt32Array, UInt32Array.Builder>(x => x.Append(123).AppendNull().AppendNull().Append(456), 4, 2, 0x09);
TestArrayBuilder<UInt64Array, UInt64Array.Builder>(x => x.Append(123).AppendNull().AppendNull().Append(456), 4, 2, 0x09);
TestArrayBuilder<UInt64Array, UInt64Array.Builder>(x => x.Append(123).AppendNull().AppendNull().Append(456), 4, 2, 0x09);
TestArrayBuilder<FloatArray, FloatArray.Builder>(x => x.Append(123).AppendNull().AppendNull().Append(456), 4, 2, 0x09);
TestArrayBuilder<DoubleArray, DoubleArray.Builder>(x => x.Append(123).AppendNull().AppendNull().Append(456), 4, 2, 0x09);
}
[Fact]
public void BooleanArrayBuilderProducersExpectedArray()
{
TestArrayBuilder<BooleanArray, BooleanArray.Builder>(x => x.Append(true).Append(false).Append(true));
TestArrayBuilder<BooleanArray, BooleanArray.Builder>(x => x.Append(true).AppendNull().Append(false).Append(true), 4, 1, 0x0D);
}
[Fact]
public void StringArrayBuilderHandlesNullsAndEmptyStrings()
{
var stringArray = TestArrayBuilder<StringArray, StringArray.Builder>(x => x.Append("123").Append(null).AppendNull().Append(string.Empty), 4, 2, 0x09);
Assert.Equal("123", stringArray.GetString(0));
Assert.Null(stringArray.GetString(1));
Assert.Null(stringArray.GetString(2));
Assert.Equal(string.Empty, stringArray.GetString(3));
}
[Fact]
public void ListArrayBuilder()
{
var listBuilder = new ListArray.Builder(StringType.Default);
var valueBuilder = listBuilder.ValueBuilder as StringArray.Builder;
Assert.NotNull(valueBuilder);
listBuilder.Append();
valueBuilder.Append("1");
listBuilder.AppendNull();
listBuilder.Append();
valueBuilder.Append("22").Append("33");
listBuilder.Append();
valueBuilder.Append("444").AppendNull().Append("555").Append("666");
var list = listBuilder.Build();
Assert.Equal(
new List<string> { "1" },
ConvertStringArrayToList(list.GetSlicedValues(0) as StringArray));
Assert.Null(list.GetSlicedValues(1));
Assert.Equal(
new List<string> { "22", "33" },
ConvertStringArrayToList(list.GetSlicedValues(2) as StringArray));
Assert.Equal(
new List<string> { "444", null, "555", "666" },
ConvertStringArrayToList(list.GetSlicedValues(3) as StringArray));
List<string> ConvertStringArrayToList(StringArray array)
{
var length = array.Length;
var resultList = new List<string>(length);
for (var index = 0; index < length; index++)
{
resultList.Add(array.GetString(index));
}
return resultList;
}
}
[Fact]
public void ListArrayBuilderValidityBuffer()
{
ListArray listArray = new ListArray.Builder(Int64Type.Default).Append().AppendNull().Build();
Assert.False(listArray.IsValid(2));
}
[Fact]
public void NestedListArrayBuilder()
{
var childListType = new ListType(Int64Type.Default);
var parentListBuilder = new ListArray.Builder(childListType);
var childListBuilder = parentListBuilder.ValueBuilder as ListArray.Builder;
Assert.NotNull(childListBuilder);
var valueBuilder = childListBuilder.ValueBuilder as Int64Array.Builder;
Assert.NotNull(valueBuilder);
parentListBuilder.Append();
childListBuilder.Append();
valueBuilder.Append(1);
childListBuilder.Append();
valueBuilder.Append(2).Append(3);
parentListBuilder.Append();
childListBuilder.Append();
valueBuilder.Append(4).Append(5).Append(6).Append(7);
parentListBuilder.Append();
childListBuilder.Append();
valueBuilder.Append(8).Append(9).Append(10).Append(11).Append(12);
var parentList = parentListBuilder.Build();
var childList1 = (ListArray)parentList.GetSlicedValues(0);
var childList2 = (ListArray)parentList.GetSlicedValues(1);
var childList3 = (ListArray)parentList.GetSlicedValues(2);
Assert.Equal(2, childList1.Length);
Assert.Equal(1, childList2.Length);
Assert.Equal(1, childList3.Length);
Assert.Equal(
new List<long?> { 1 },
((Int64Array)childList1.GetSlicedValues(0)).ToList());
Assert.Equal(
new List<long?> { 2, 3 },
((Int64Array)childList1.GetSlicedValues(1)).ToList());
Assert.Equal(
new List<long?> { 4, 5, 6, 7 },
((Int64Array)childList2.GetSlicedValues(0)).ToList());
Assert.Equal(
new List<long?> { 8, 9, 10, 11, 12 },
((Int64Array)childList3.GetSlicedValues(0)).ToList());
}
public class TimestampArrayBuilder
{
[Fact]
public void ProducesExpectedArray()
{
var now = DateTimeOffset.UtcNow.ToLocalTime();
var timestampType = new TimestampType(TimeUnit.Nanosecond, TimeZoneInfo.Local);
var array = new TimestampArray.Builder(timestampType)
.Append(now)
.Build();
Assert.Equal(1, array.Length);
var value = array.GetTimestamp(0);
Assert.NotNull(value);
Assert.Equal(now, value.Value);
timestampType = new TimestampType(TimeUnit.Microsecond, TimeZoneInfo.Local);
array = new TimestampArray.Builder(timestampType)
.Append(now)
.Build();
Assert.Equal(1, array.Length);
value = array.GetTimestamp(0);
Assert.NotNull(value);
Assert.Equal(now.Truncate(TimeSpan.FromTicks(10)), value.Value);
timestampType = new TimestampType(TimeUnit.Millisecond, TimeZoneInfo.Local);
array = new TimestampArray.Builder(timestampType)
.Append(now)
.Build();
Assert.Equal(1, array.Length);
value = array.GetTimestamp(0);
Assert.NotNull(value);
Assert.Equal(now.Truncate(TimeSpan.FromTicks(TimeSpan.TicksPerMillisecond)), value.Value);
}
}
private static TArray TestArrayBuilder<TArray, TArrayBuilder>(Action<TArrayBuilder> action, int expectedLength = 3, int expectedNullCount = 0, int expectedNulls = 0)
where TArray : IArrowArray
where TArrayBuilder : IArrowArrayBuilder<TArray>, new()
{
var builder = new TArrayBuilder();
action(builder);
var array = builder.Build(default);
Assert.IsAssignableFrom<TArray>(array);
Assert.NotNull(array);
Assert.Equal(expectedLength, array.Length);
Assert.Equal(expectedNullCount, array.NullCount);
if (expectedNulls != 0)
{
Assert.True(array.Data.Buffers[0].Span.Slice(0, 1).SequenceEqual(new ReadOnlySpan<byte>(BitConverter.GetBytes(expectedNulls).Take(1).ToArray())));
}
return array;
}
}
}
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