object extensions for changed properties

Yuck · Sep 18, 2023 · 07fc1cf · 07fc1cf
1 parent e88e34f
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Showing 5 changed files with 48 additions and 3 deletions.
diff --git a/src/YuckQi.Domain.Services/YuckQi.Domain.Services.csproj b/src/YuckQi.Domain.Services/YuckQi.Domain.Services.csproj
@@ -4,7 +4,7 @@
     <TargetFramework>net6.0</TargetFramework>
     <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
     <Authors>Kevin J Lambert</Authors>
-    <Version>6.2.0</Version>
+    <Version>6.4.0</Version>
     <PackageLicenseFile>LICENSE</PackageLicenseFile>
     <Description>A .NET library for bootstrapping a domain services project.</Description>
     <Nullable>enable</Nullable>

diff --git a/src/YuckQi.Domain.Validation/YuckQi.Domain.Validation.csproj b/src/YuckQi.Domain.Validation/YuckQi.Domain.Validation.csproj
@@ -4,7 +4,7 @@
     <TargetFramework>net6.0</TargetFramework>
     <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
     <Authors>Kevin J Lambert</Authors>
-    <Version>6.2.0</Version>
+    <Version>6.4.0</Version>
     <PackageLicenseFile>LICENSE</PackageLicenseFile>
     <Description>A .NET library providing domain validation fundamentals.</Description>
     <Nullable>enable</Nullable>

diff --git a/src/YuckQi.Domain/Extensions/ObjectExtensions.cs b/src/YuckQi.Domain/Extensions/ObjectExtensions.cs
@@ -0,0 +1,21 @@
+using System;
+using System.Collections.Concurrent;
+using System.Collections.Generic;
+using System.Linq;
+using System.Reflection;
+
+namespace YuckQi.Domain.Extensions;
+
+public static class ObjectExtensions
+{
+    private static readonly ConcurrentDictionary<Type, IEnumerable<PropertyInfo>> PropertiesByType = new ();
+
+    public static Dictionary<PropertyInfo, (Object?, Object?)> GetDifferencesByProperty<T>(this T a, T b)
+    {
+        var properties = PropertiesByType.GetOrAdd(typeof(T), type => type.GetProperties());
+        var values = properties.Select(t => new KeyValuePair<PropertyInfo, (Object?, Object?)>(t, (t.GetValue(a), t.GetValue(b))));
+        var differences = values.Where(t => ! Equals(t.Value.Item1, t.Value.Item2)).ToDictionary(t => t.Key, t => t.Value);
+
+        return differences;
+    }
+}
diff --git a/src/YuckQi.Domain/YuckQi.Domain.csproj b/src/YuckQi.Domain/YuckQi.Domain.csproj
@@ -4,7 +4,7 @@
     <TargetFramework>net6.0</TargetFramework>
     <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
     <Authors>Kevin J Lambert</Authors>
-    <Version>6.2.0</Version>
+    <Version>6.4.0</Version>
     <PackageLicenseFile>LICENSE</PackageLicenseFile>
     <Description>A .NET library for bootstrapping a domain model project.</Description>
     <Nullable>enable</Nullable>

diff --git a/test/YuckQi.Domain.UnitTests/Extensions/ObjectExtensionTests.cs b/test/YuckQi.Domain.UnitTests/Extensions/ObjectExtensionTests.cs
@@ -0,0 +1,24 @@
+using System.Linq;
+using NUnit.Framework;
+using YuckQi.Domain.Extensions;
+
+namespace YuckQi.Domain.UnitTests.Extensions;
+
+public class ObjectExtensionTests
+{
+    [SetUp]
+    public void Setup() { }
+
+    [Test]
+    public void Objects_WithDifferentStringValues_HaveOneDifference()
+    {
+        var a = new { a = 123, b = "test" };
+        var b = new { a = 123, b = "hello" };
+        var differences = a.GetDifferencesByProperty(b);
+
+        Assert.That(differences, Has.Exactly(1).Items);
+        Assert.That(differences.Single().Key.Name, Is.EqualTo(nameof(a.b)));
+        Assert.That(differences.Single().Value.Item1, Is.EqualTo("test"));
+        Assert.That(differences.Single().Value.Item2, Is.EqualTo("hello"));
+    }
+}