TinyBDD.MSTest

RSCG – TinyBDD.MSTest
 
 

Optimizing Test Code with BDD Style Testing

This is how you can use TinyBDD.MSTest .

The code that you start with is

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <TargetFramework>net10.0</TargetFramework>
    <ImplicitUsings>enable</ImplicitUsings>
    <Nullable>enable</Nullable>

    <IsPackable>false</IsPackable>
    <IsTestProject>true</IsTestProject>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.8.1" />
    <PackageReference Include="MSTest.TestAdapter" Version="4.3.2" />
    <PackageReference Include="MSTest.TestFramework" Version="4.3.2" />
    <PackageReference Include="coverlet.collector" Version="10.0.1">
      <PrivateAssets>all</PrivateAssets>
      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
    </PackageReference>
    <PackageReference Include="TinyBDD.MSTest" Version="0.19.29" />
  </ItemGroup>

  <ItemGroup>
    <ProjectReference Include="..\Mock\MockData.csproj" />
  </ItemGroup>
	<PropertyGroup>
		<EmitCompilerGeneratedFiles>true</EmitCompilerGeneratedFiles>
		<CompilerGeneratedFilesOutputPath>$(BaseIntermediateOutputPath)\GX</CompilerGeneratedFilesOutputPath>
	</PropertyGroup>

</Project>

The code that you will use is

using TinyBDD.MSTest;

namespace TestClock;

public class MyClock : IMyClock
{
    public DateTime GetNow()
    {
        return DateTime.Now;
    }
    public DateTime GetUtcNow()
    {
        return DateTime.UtcNow;
    }
}

[TestClass]
public partial class TestData:  TinyBddMsTestBase
{
    [TestMethod]
    public async Task TestMyClock()
    {
        
        await Given("start", () => new MyClock())
            .When("get now", x => x.GetNow())
            .Then("equals 84", x => DateTime.Now>=x)
            .AssertPassed();
    }
}

The code that is generated is

// <auto-generated/>
#nullable enable

namespace TestClock
{
    partial class TestData
    {
        async System.Threading.Tasks.Task TestMyClock_Optimized()
        {
            // Optimized implementation - no boxing!
            var __ctx = TinyBDD.Ambient.Current.Value;
            var __sw = System.Diagnostics.Stopwatch.StartNew();

            try
            {
                // Given: start
                __sw.Restart();
                TestClock.MyClock __step0 = new MyClock();
                __sw.Stop();
                __ctx.AddStep(new TinyBDD.StepResult
                {
                    Kind = "Given",
                    Title = "start",
                    Elapsed = __sw.Elapsed
                });

                // When: get now
                __sw.Restart();
                System.DateTime __step1 = __step0.GetNow();
                __sw.Stop();
                __ctx.AddStep(new TinyBDD.StepResult
                {
                    Kind = "When",
                    Title = "get now",
                    Elapsed = __sw.Elapsed
                });

                // Then: equals 84
                __sw.Restart();
                bool __step2 = DateTime.Now>=__step1;
                __sw.Stop();
                __ctx.AddStep(new TinyBDD.StepResult
                {
                    Kind = "Then",
                    Title = "equals 84",
                    Elapsed = __sw.Elapsed
                });
                if (!__step2)
                {
                    throw new TinyBDD.BddStepException("Assertion failed: equals 84", __ctx, null);
                }
            }
            catch (System.Exception __ex)
            {
                // TODO: Handle errors according to ScenarioOptions
                throw;
            }
        }
    }
}

Code and pdf at

https://ignatandrei.github.io/RSCG_Examples/v2/docs/TinyBDD.MSTest