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CM-1173: Differences Between Record Struct and Record Class in C# (#2044)
* initial repo * comments * test names * Move PR to folder csharp-classes-struct-record --------- Co-authored-by: Florian Prinz (FLPR) <flpr@simcorp.com>
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‎csharp-classes-struct-record/DifferencesRecordStructAndRecordClassInCSharp/DifferencesRecordStructAndRecordClassInCSharp.sln‎

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‎csharp-classes-struct-record/DifferencesRecordStructAndRecordClassInCSharp/DifferencesRecordStructAndRecordClassInCSharp/DefaultValues.cs‎

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namespace DifferencesRecordStructAndRecordClassInCSharp;
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public static class DefaultValues
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{
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public static PersonRecordClass? GetRecordClassDefaultValue()
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{
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return default(PersonRecordClass);
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}
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public static PersonRecordStruct? GetRecordStructDefaultValue()
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{
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return default(PersonRecordStruct);
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}
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}

‎csharp-classes-struct-record/DifferencesRecordStructAndRecordClassInCSharp/DifferencesRecordStructAndRecordClassInCSharp/DifferencesRecordStructAndRecordClassInCSharp.csproj‎

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<Project Sdk="Microsoft.NET.Sdk">
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<PropertyGroup>
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<OutputType>Exe</OutputType>
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<TargetFramework>net8.0</TargetFramework>
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<ImplicitUsings>enable</ImplicitUsings>
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<Nullable>enable</Nullable>
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</PropertyGroup>
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</Project>

‎csharp-classes-struct-record/DifferencesRecordStructAndRecordClassInCSharp/DifferencesRecordStructAndRecordClassInCSharp/Program.cs‎

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using DifferencesRecordStructAndRecordClassInCSharp;
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var recordClassDefaultValue = DefaultValues.GetRecordClassDefaultValue();
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var recordStructDefaultValue = DefaultValues.GetRecordStructDefaultValue();
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Console.WriteLine($"Record class default value is {(recordClassDefaultValue == null ? "null" : recordClassDefaultValue)}");
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Console.WriteLine($"Record struct default value is {(recordStructDefaultValue == null ? "null" : recordStructDefaultValue)}");
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‎csharp-classes-struct-record/DifferencesRecordStructAndRecordClassInCSharp/DifferencesRecordStructAndRecordClassInCSharp/TypeDefinitions.cs‎

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public record struct PersonRecordStruct(string Name, DateTime BirthdayDate, int YearsOld, string[] PhoneNumbers);
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public readonly record struct PersonRecordStructReadOnly(string Name, DateTime BirthdayDate, int YearsOld, string[] PhoneNumbers);
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public record class PersonRecordClass(string Name, DateTime BirthdayDate, int YearsOld, string[] PhoneNumbers);
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public record class PersonWithAddressRecordClass(string Name, DateTime BirthdayDate, int YearsOld, string[] PhoneNumbers, string Address) :
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PersonRecordClass(Name, BirthdayDate, YearsOld, PhoneNumbers);
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public record class PersonRecordClassInitSetters
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{
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public required string Name { get; init; }
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public DateTime BirthdayDate { get; init; }
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public int YearsOld { get; init; }
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public required string[] PhoneNumbers { get; init; }
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};

‎csharp-classes-struct-record/DifferencesRecordStructAndRecordClassInCSharp/Tests/DefaultValueTests.cs‎

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using DifferencesRecordStructAndRecordClassInCSharp;
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namespace Tests;
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[TestClass]
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public class DefaultValueTests
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{
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[TestMethod]
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public void GivenRecordStruct_WhenGetDefaultValue_ThenReturnsDefaultInitializedValues()
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{
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var recordStructDefaultValue = DefaultValues.GetRecordStructDefaultValue();
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Assert.IsTrue(recordStructDefaultValue is not null);
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}
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[TestMethod]
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public void GivenRecordClass_WhenGetDefaultValue_ThenReturnsNull()
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{
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var recordClassDefaultValue = DefaultValues.GetRecordClassDefaultValue();
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Assert.IsTrue(recordClassDefaultValue is null);
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}
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}

‎csharp-classes-struct-record/DifferencesRecordStructAndRecordClassInCSharp/Tests/Tests.csproj‎

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<TargetFramework>net8.0</TargetFramework>
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<IsTestProject>true</IsTestProject>
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<PackageReference Include="MSTest.TestAdapter" Version="3.1.1" />
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<ProjectReference Include="..\DifferencesRecordStructAndRecordClassInCSharp\DifferencesRecordStructAndRecordClassInCSharp.csproj" />
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<Using Include="Microsoft.VisualStudio.TestTools.UnitTesting" />
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</Project>

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