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// Copyright 2009-2022 Josh Close
// This file is a part of CsvHelper and is dual licensed under MS-PL and Apache 2.0.
// See LICENSE.txt for details or visit http://www.opensource.org/licenses/ms-pl.html for MS-PL and http://opensource.org/licenses/Apache-2.0 for Apache 2.0.
// https://github.com/JoshClose/CsvHelper
using System.Globalization;
using System.IO;
using System.Linq;
using CsvHelper.Configuration;
using CsvHelper.TypeConversion;
using Xunit;
namespace CsvHelper.Tests.TypeConversion
{
public class TypeConverterOptionsTests
{
[Fact]
public void GlobalNullValueTest()
{
var config = new CsvConfiguration(CultureInfo.InvariantCulture)
{
HasHeaderRecord = false,
};
using (var stream = new MemoryStream())
using (var writer = new StreamWriter(stream))
using (var reader = new StreamReader(stream))
using (var csv = new CsvReader(reader, config))
{
writer.WriteLine(",");
writer.Flush();
stream.Position = 0;
csv.Context.TypeConverterOptionsCache.GetOptions<string>().NullValues.Add(string.Empty);
var records = csv.GetRecords<Test>().ToList();
Assert.Null(records[0].Id);
Assert.Null(records[0].Name);
}
}
[Fact]
public void MappingNullValueTest()
{
var config = new CsvConfiguration(CultureInfo.InvariantCulture)
{
HasHeaderRecord = false,
};
using (var stream = new MemoryStream())
using (var writer = new StreamWriter(stream))
using (var reader = new StreamReader(stream))
using (var csv = new CsvReader(reader, config))
{
writer.WriteLine(",");
writer.Flush();
stream.Position = 0;
csv.Context.RegisterClassMap<TestMap>();
var records = csv.GetRecords<Test>().ToList();
Assert.Null(records[0].Id);
Assert.Null(records[0].Name);
}
}
[Fact]
public void GlobalAndMappingNullValueTest()
{
var config = new CsvConfiguration(CultureInfo.InvariantCulture)
{
HasHeaderRecord = false,
};
using (var stream = new MemoryStream())
using (var writer = new StreamWriter(stream))
using (var reader = new StreamReader(stream))
using (var csv = new CsvReader(reader, config))
{
writer.WriteLine(",");
writer.Flush();
stream.Position = 0;
csv.Context.TypeConverterOptionsCache.GetOptions<string>().NullValues.Add("null");
csv.Context.RegisterClassMap<TestMap>();
var records = csv.GetRecords<Test>().ToList();
Assert.Null(records[0].Id);
Assert.Null(records[0].Name);
}
}
private class Test
{
public int? Id { get; set; }
public string Name { get; set; }
}
private sealed class TestMap : ClassMap<Test>
{
public TestMap()
{
Map(m => m.Id);
Map(m => m.Name).TypeConverterOption.NullValues(string.Empty);
}
}
// auto map options have defaults
// map options could be default or custom if set
// global has defaults or custom
// merge global with map
}
}
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