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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 CsvHelper.Configuration;
using Xunit;
using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace CsvHelper.Tests.Parsing
{
public class FieldCacheTests
{
[Fact]
public void Read_WithFieldCacheEnabled_ReturnsSameFieldInstance()
{
var s = new StringBuilder();
s.Append("1,2\r\n");
s.Append("2,1\r\n");
var config = new CsvConfiguration(CultureInfo.InvariantCulture)
{
CacheFields = true,
};
using (var reader = new StringReader(s.ToString()))
using (var parser = new CsvParser(reader, config))
{
parser.Read();
var a = parser[0];
parser.Read();
var b = parser[1];
Assert.Same(a, b);
}
}
[Fact]
public void Read_WithFieldCacheDisabled_ReturnsDifferentFieldInstance()
{
var s = new StringBuilder();
s.Append("1,2\r\n");
s.Append("2,1\r\n");
var config = new CsvConfiguration(CultureInfo.InvariantCulture)
{
CacheFields = false,
};
using (var reader = new StringReader(s.ToString()))
using (var parser = new CsvParser(reader, config))
{
parser.Read();
var a = parser[0];
parser.Read();
var b = parser[1];
Assert.NotSame(a, b);
}
}
[Fact]
public void Test1()
{
// "542008", "27721116", "98000820" have hash code 3769566006
var value1 = "542008";
var value2 = "27721116";
var value3 = "98000820";
var value4 = "542008";
var cache = new FieldCache(1);
var field1 = cache.GetField(value1.ToCharArray(), 0, value1.Length);
var field2 = cache.GetField(value2.ToCharArray(), 0, value2.Length);
var field3 = cache.GetField(value3.ToCharArray(), 0, value3.Length);
var field4 = cache.GetField(value4.ToCharArray(), 0, value4.Length);
Assert.Equal(value1, field1);
Assert.Equal(value2, field2);
Assert.Equal(value3, field3);
Assert.Equal(value4, field4);
Assert.NotSame(value1, field1);
Assert.NotSame(value2, field2);
Assert.NotSame(value3, field3);
Assert.NotSame(value4, field4);
Assert.Same(field1, field4);
}
}
}
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