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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.IO;
using System.Linq;
using Xunit;
using CsvHelper.Configuration;
using System.Globalization;
namespace CsvHelper.Tests
{
public class CsvReaderReferenceMappingTests
{
[Fact]
public void NestedReferencesClassMappingTest()
{
using (var stream = new MemoryStream())
using (var reader = new StreamReader(stream))
using (var writer = new StreamWriter(stream))
using (var csv = new CsvReader(reader, CultureInfo.InvariantCulture))
{
csv.Context.RegisterClassMap<AMap>();
writer.WriteLine("AId,BId,CId,DId");
writer.WriteLine("a1,b1,c1,d1");
writer.WriteLine("a2,b2,c2,d2");
writer.WriteLine("a3,b3,c3,d3");
writer.WriteLine("a4,b4,c4,d4");
writer.Flush();
stream.Position = 0;
var list = csv.GetRecords<A>().ToList();
Assert.NotNull(list);
Assert.Equal(4, list.Count);
for (var i = 0; i < 4; i++)
{
var rowId = i + 1;
var row = list[i];
Assert.Equal("a" + rowId, row.Id);
Assert.Equal("b" + rowId, row.B.Id);
Assert.Equal("c" + rowId, row.B.C.Id);
Assert.Equal("d" + rowId, row.B.C.D.Id);
}
}
}
private class A
{
public string Id { get; set; }
public B B { get; set; }
}
private class B
{
public string Id { get; set; }
public C C { get; set; }
}
private class C
{
public string Id { get; set; }
public D D { get; set; }
}
private class D
{
public string Id { get; set; }
}
private sealed class AMap : ClassMap<A>
{
public AMap()
{
Map(m => m.Id).Name("AId");
References<BMap>(m => m.B);
}
}
private sealed class BMap : ClassMap<B>
{
public BMap()
{
Map(m => m.Id).Name("BId");
References<CMap>(m => m.C);
}
}
private sealed class CMap : ClassMap<C>
{
public CMap()
{
Map(m => m.Id).Name("CId");
References<DMap>(m => m.D);
}
}
private sealed class DMap : ClassMap<D>
{
public DMap()
{
Map(m => m.Id).Name("DId");
}
}
}
}
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