First commit. Include junk from template to remove

tests/Domain.UnitTests/Domain.UnitTests.csproj

@@ -0,0 +1,24 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <RootNamespace>Hutopy.Domain.UnitTests</RootNamespace>
+        <AssemblyName>Hutopy.Domain.UnitTests</AssemblyName>
+    </PropertyGroup>
+
+    <ItemGroup>
+        <PackageReference Include="Microsoft.NET.Test.Sdk" />
+        <PackageReference Include="nunit" />
+        <PackageReference Include="NUnit.Analyzers">
+          <PrivateAssets>all</PrivateAssets>
+          <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+        </PackageReference>
+        <PackageReference Include="NUnit3TestAdapter" />
+        <PackageReference Include="coverlet.collector" />
+        <PackageReference Include="FluentAssertions" />
+    </ItemGroup>
+
+    <ItemGroup>
+        <ProjectReference Include="..\..\src\Domain\Domain.csproj" />
+    </ItemGroup>
+
+</Project>

tests/Domain.UnitTests/ValueObjects/ColourTests.cs

@@ -0,0 +1,50 @@
+using Hutopy.Domain.Exceptions;
+using Hutopy.Domain.ValueObjects;
+using FluentAssertions;
+using NUnit.Framework;
+
+namespace Hutopy.Domain.UnitTests.ValueObjects;
+
+public class ColourTests
+{
+    [Test]
+    public void ShouldReturnCorrectColourCode()
+    {
+        var code = "#FFFFFF";
+
+        var colour = Colour.From(code);
+
+        colour.Code.Should().Be(code);
+    }
+
+    [Test]
+    public void ToStringReturnsCode()
+    {
+        var colour = Colour.White;
+
+        colour.ToString().Should().Be(colour.Code);
+    }
+
+    [Test]
+    public void ShouldPerformImplicitConversionToColourCodeString()
+    {
+        string code = Colour.White;
+
+        code.Should().Be("#FFFFFF");
+    }
+
+    [Test]
+    public void ShouldPerformExplicitConversionGivenSupportedColourCode()
+    {
+        var colour = (Colour)"#FFFFFF";
+
+        colour.Should().Be(Colour.White);
+    }
+
+    [Test]
+    public void ShouldThrowUnsupportedColourExceptionGivenNotSupportedColourCode()
+    {
+        FluentActions.Invoking(() => Colour.From("##FF33CC"))
+            .Should().Throw<UnsupportedColourException>();
+    }
+}