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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 System.Globalization;
using System.IO;
using System.Linq;
using System.Text;
using Xunit;
namespace CsvHelper.Tests.Reading
{
public class ValidateTests
{
[Fact]
public void GenericValidateTest()
{
var config = new CsvConfiguration(CultureInfo.InvariantCulture)
{
MissingFieldFound = null,
};
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("Id,Name");
writer.WriteLine(",one");
writer.Flush();
stream.Position = 0;
csv.Context.RegisterClassMap<GenericValidateMap>();
Assert.Throws<FieldValidationException>(() => csv.GetRecords<Test>().ToList());
}
}
[Fact]
public void NonGenericValidateTest()
{
var config = new CsvConfiguration(CultureInfo.InvariantCulture)
{
MissingFieldFound = null,
};
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("Id,Name");
writer.WriteLine(",one");
writer.Flush();
stream.Position = 0;
csv.Context.RegisterClassMap<NonGenericValidateMap>();
Assert.Throws<FieldValidationException>(() => csv.GetRecords<Test>().ToList());
}
}
[Fact]
public void LogInsteadTest()
{
var config = new CsvConfiguration(CultureInfo.InvariantCulture)
{
MissingFieldFound = null,
};
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("Id,Name");
writer.WriteLine("1,");
writer.Flush();
stream.Position = 0;
var logger = new StringBuilder();
csv.Context.RegisterClassMap(new LogInsteadMap(logger));
csv.GetRecords<Test>().ToList();
var expected = new StringBuilder();
expected.AppendLine("Field '' is not valid!");
Assert.Equal(expected.ToString(), logger.ToString());
}
}
[Fact]
public void CustomExceptionTest()
{
var config = new CsvConfiguration(CultureInfo.InvariantCulture)
{
MissingFieldFound = null,
};
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("Id,Name");
writer.WriteLine(",one");
writer.Flush();
stream.Position = 0;
csv.Context.RegisterClassMap<CustomExceptionMap>();
Assert.Throws<CustomException>(() => csv.GetRecords<Test>().ToList());
}
}
[Fact]
public void ValidateMessageTest()
{
var config = new CsvConfiguration(CultureInfo.InvariantCulture)
{
};
var s = new TestStringBuilder(config.NewLine);
s.AppendLine("Id,Name");
s.AppendLine("1,one");
using (var reader = new StringReader(s))
using (var csv = new CsvReader(reader, config))
{
csv.Context.RegisterClassMap<ValidationMessageMap>();
var exception = Assert.Throws<FieldValidationException>(() => csv.GetRecords<Test>().ToList());
Assert.StartsWith("Field 'one' was not foo.", exception.Message);
}
}
private class Test
{
public int Id { get; set; }
public string Name { get; set; }
}
private sealed class GenericValidateMap : ClassMap<Test>
{
public GenericValidateMap()
{
Map(m => m.Id).Validate(args => !string.IsNullOrEmpty(args.Field));
Map(m => m.Name);
}
}
private sealed class NonGenericValidateMap : ClassMap<Test>
{
public NonGenericValidateMap()
{
AutoMap(System.Globalization.CultureInfo.InvariantCulture);
foreach (var memberMap in MemberMaps)
{
Map(typeof(Test), memberMap.Data.Member).Validate(args => !string.IsNullOrEmpty(args.Field));
}
}
}
private sealed class LogInsteadMap : ClassMap<Test>
{
public LogInsteadMap(StringBuilder logger)
{
Map(m => m.Id);
Map(m => m.Name).Validate(args =>
{
var isValid = !string.IsNullOrEmpty(args.Field);
if (!isValid)
{
logger.AppendLine($"Field '{args.Field}' is not valid!");
}
return true;
});
}
}
private sealed class CustomExceptionMap : ClassMap<Test>
{
public CustomExceptionMap()
{
Map(m => m.Id).Validate(field => throw new CustomException());
Map(m => m.Name);
}
}
private class CustomException : CsvHelperException
{
}
private class ValidationMessageMap : ClassMap<Test>
{
public ValidationMessageMap()
{
Map(m => m.Id);
Map(m => m.Name).Validate(args => args.Field == "foo", args => $"Field '{args.Field}' was not foo.");
}
}
}
}
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