RSpec-Let 1.1.1

.NET Standard 2.0 .NET Framework 4.5
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, C# scripting and .NET Interactive. 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 Versions
.NET net5.0 net5.0-windows net6.0 net6.0-android net6.0-ios net6.0-maccatalyst net6.0-macos net6.0-tvos net6.0-windows net7.0 net7.0-android net7.0-ios net7.0-maccatalyst net7.0-macos net7.0-tvos net7.0-windows
.NET Core netcoreapp2.0 netcoreapp2.1 netcoreapp2.2 netcoreapp3.0 netcoreapp3.1
.NET Standard netstandard2.0 netstandard2.1
.NET Framework net45 net451 net452 net46 net461 net462 net463 net47 net471 net472 net48 net481
MonoAndroid monoandroid
MonoMac monomac
MonoTouch monotouch
Tizen tizen40 tizen60
Xamarin.iOS xamarinios
Xamarin.Mac xamarinmac
Xamarin.TVOS xamarintvos
Xamarin.WatchOS xamarinwatchos
Compatible target framework(s)
Additional computed target framework(s)
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 14,745 3/7/2020
1.1.0 19,390 11/21/2017
1.0.0 18,606 7/23/2016