Add tests for controller. Put in contigency for when an item isn't found.

src/Robware.Api.Blog.Tests/BlogControllerTests.cs

@@ -0,0 +1,52 @@
+using System.Threading.Tasks;
+using FluentAssertions;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.Extensions.Logging;
+using NSubstitute;
+using NSubstitute.ExceptionExtensions;
+using Robware.Api.Blog.Controllers;
+using Robware.Blog;
+using Robware.Data;
+using Xunit;
+
+namespace Robware.Api.Blog.Tests {
+	public class BlogControllerTests {
+		[Fact]
+		public async Task Get_WithUrl_ReturnsBlogPost() {
+			var logger = Substitute.For<ILogger<BlogController>>();
+			var repo = Substitute.For<IBlogRepository>();
+
+			repo.GetPostByUrlAsync("url").Returns(new BlogPost());
+
+			var expectation = new BlogPost();
+
+			var controller = new BlogController(logger, repo);
+			(await controller.Get("url")).Value.Should().BeEquivalentTo(expectation);
+		}
+
+		[Fact]
+		public async Task Get_WithId_ReturnsBlogPost() {
+			var logger = Substitute.For<ILogger<BlogController>>();
+			var repo = Substitute.For<IBlogRepository>();
+
+			repo.GetPostByIdAsync(1).Returns(new BlogPost());
+
+			var expectation = new BlogPost();
+
+			var controller = new BlogController(logger, repo);
+			(await controller.Get("1")).Value.Should().BeEquivalentTo(expectation);
+		}
+
+		[Fact]
+		public async Task Get_WithInvalidUrl_Returns404() {
+			var logger = Substitute.For<ILogger<BlogController>>();
+			var repo = Substitute.For<IBlogRepository>();
+
+			repo.GetPostByUrlAsync("url").Throws(new ItemNotFoundException("", null));
+
+			var controller = new BlogController(logger, repo);
+			(await controller.Get("url")).Result.Should().BeOfType<NotFoundObjectResult>();
+
+		}
+	}
+}

src/Robware.Api.Blog.Tests/Robware.Api.Blog.Tests.csproj

@@ -0,0 +1,22 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
+
+    <IsPackable>false</IsPackable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="FluentAssertions" Version="5.10.3" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.2.0" />
+    <PackageReference Include="NSubstitute" Version="4.2.1" />
+    <PackageReference Include="xunit" Version="2.4.0" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.0" />
+    <PackageReference Include="coverlet.collector" Version="1.0.1" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\Robware.Api.Blog\Robware.Api.Blog.csproj" />
+  </ItemGroup>
+
+</Project>