RSpec-Let 1.1.1

dotnet add package RSpec-Let --version 1.1.1
NuGet\Install-Package RSpec-Let -Version 1.1.1
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package.
<PackageReference Include="RSpec-Let" Version="1.1.1" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add RSpec-Let --version 1.1.1
#r "nuget: RSpec-Let, 1.1.1"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package.
// Install RSpec-Let as a Cake Addin
#addin nuget:?package=RSpec-Let&version=1.1.1

// Install RSpec-Let as a Cake Tool
#tool nuget:?package=RSpec-Let&version=1.1.1

Let.cs

When testing in C# it's not unusual to test instances of a class. The problem is we all face though is knowing where to initialize our objects.

  1. Create a field that is initialized and reset on TearDown?
  2. Create a null field that is initialized during [SetUp]?
  3. Duplicate the initialization in every [Test]?

All three of these are valid, and unfortunately, all three can be found in the same project and sometimes the same test!

namespace DoYourTestsLookLikeThis
{
    [TestFixture]
    public class InsertTearsEmoji
    {
        private UnitOfWork _work = new UnitOfWork();
        private Mock<IArticlesService> MockArticlesService { get; set; }

        [SetUp]
        public void BeforeEach()
        {
            MockArticlesService = new Mock<IArticlesService>();
        }

        [TearDown]
        public void AfterEach()
        {
            // 😭😭😭
            _work = new UnitOfWork();
        }

        [Test]
        public void IndexShouldLoadPublishedArticles()
        {
            var controller = new ArticlesController(MockArticlesService.Object);

            controller.Index();
            MockArticlesService.Verify(service => service.Published(), Times.Once);
        }
    }
}

It's dangerous to go alone, take Let.cs with you ðŸĪš

namespace HappyDance
{
    // This allows us to call +Let+ directly
    using static LetTestHelper.LetHelper;

    [TestFixture]
    public class ArticlesControllerTest
    {
        private UnitOfWork Work => Let(() => new UnitOfWork());
        private Mock<IArticlesService> MockArticlesService => Let(() => new Mock<IArticlesService>());

        // It's so easy, why not move it here too
        private ArticlesController Controller => Let(() => new ArticlesController(MockArticlesService.Object);

        [TearDown]
        public void AfterEach()
        {
            // You may cry, but only once (see below 👇)
            LetTestHelper.LetHelper.Flush();
        }

        [Test]
        public void IndexShouldLoadPublishedArticles()
        {
            Controller.Index();
            MockArticlesService.Verify(service => service.Published(), Times.Once);
        }
    }
}

Flush the Cache ðŸš―

  • After each test you will need to manually flush the results. My recommendation is creating a test helper that will flush the cache on tear down.
namespace MyProject.TestHelper
{
    [TestFixture]
    public class TestBase
    {
        [TearDown]
        public void Clean_LetHelper()
        {
            LetTestHelper.LetHelper.Flush();
        }
    }
}

Inspiration

Coming from Ruby I found instance management in C# to be, well, not fun. This is is influenced by RSpec let.

Product Compatible and additional computed target framework versions.
.NET net5.0 was computed.  net5.0-windows was computed.  net6.0 was computed.  net6.0-android was computed.  net6.0-ios was computed.  net6.0-maccatalyst was computed.  net6.0-macos was computed.  net6.0-tvos was computed.  net6.0-windows was computed.  net7.0 was computed.  net7.0-android was computed.  net7.0-ios was computed.  net7.0-maccatalyst was computed.  net7.0-macos was computed.  net7.0-tvos was computed.  net7.0-windows was computed.  net8.0 was computed.  net8.0-android was computed.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-windows was computed. 
.NET Core netcoreapp2.0 was computed.  netcoreapp2.1 was computed.  netcoreapp2.2 was computed.  netcoreapp3.0 was computed.  netcoreapp3.1 was computed. 
.NET Standard netstandard2.0 is compatible.  netstandard2.1 was computed. 
.NET Framework net45 is compatible.  net451 was computed.  net452 was computed.  net46 was computed.  net461 was computed.  net462 was computed.  net463 was computed.  net47 was computed.  net471 was computed.  net472 was computed.  net48 was computed.  net481 was computed. 
MonoAndroid monoandroid was computed. 
MonoMac monomac was computed. 
MonoTouch monotouch was computed. 
Tizen tizen40 was computed.  tizen60 was computed. 
Xamarin.iOS xamarinios was computed. 
Xamarin.Mac xamarinmac was computed. 
Xamarin.TVOS xamarintvos was computed. 
Xamarin.WatchOS xamarinwatchos was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.
  • .NETFramework 4.5

    • No dependencies.
  • .NETStandard 2.0

    • No dependencies.

NuGet packages

This package is not used by any NuGet packages.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last updated
1.1.1 20,273 3/7/2020
1.1.0 19,536 11/21/2017
1.0.0 18,740 7/23/2016