add load test file

Dockerfile

@@ -12,6 +12,7 @@ WORKDIR /app
 COPY Src/*.sln .
 COPY Src/Contoso/*.csproj ./Contoso/
 COPY Src/Contoso.UnitTests/*.csproj ./Contoso.UnitTests/
+COPY Src/Contoso.LoadTests/*.csproj ./Contoso.LoadTests/
 RUN dotnet restore
 
 # copy everything else and build app
@@ -20,15 +21,22 @@ WORKDIR /app/Contoso
 RUN dotnet build -c Release /p:VersionPrefix=${VersionPrefix} /p:TreatWarningsAsErrors=true -warnaserror
 
 
-FROM build AS testrunner
+FROM build AS unittestrunner
 WORKDIR /app/Contoso.UnitTests
 ENTRYPOINT ["dotnet", "test", "--logger:trx", "--collect:XPlat Code Coverage"]
 
-
-FROM build AS test
+FROM build AS unittest
 WORKDIR /app/Contoso.UnitTests
 RUN dotnet test --collect:"XPlat Code Coverage"
 
+FROM build AS loadtestrunner
+WORKDIR /app/Contoso.LoadTests
+ENTRYPOINT ["dotnet", "test", "--logger:trx", "--results-directory", "/loadTestResults"]
+
+FROM build AS loadtest
+WORKDIR /app/Contoso.LoadTests
+RUN dotnet test
+
 FROM build AS publish
 WORKDIR /app/Contoso
 RUN dotnet publish -c Release -o /out

Src/Contoso.LoadTests/Contoso.LoadTests.csproj

@@ -0,0 +1,16 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
+
+    <IsPackable>false</IsPackable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.5.0" />
+    <PackageReference Include="xunit" Version="2.4.0" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.4.0" />
+    <PackageReference Include="coverlet.collector" Version="1.2.0" />
+  </ItemGroup>
+
+</Project>

Src/Contoso.LoadTests/LoadTest.cs

@@ -0,0 +1,71 @@
+using NBomber.Contracts;
+using NBomber.CSharp;
+using RestSharp;
+using System;
+using System.Net.Http;
+using System.Runtime.Versioning;
+using Xunit;
+using Xunit.Abstractions;
+
+namespace Contoso.LoadTests
+{
+    public class LoadTest
+    {
+
+        static HttpClient client = new HttpClient();
+        static string _stepName = "CheckIfOK";
+        private readonly Uri _path;
+        private readonly int _concurrency;
+        private readonly int _duration;
+        private readonly int _warmuUp;
+        private readonly ITestOutputHelper _output;
+
+        public LoadTest(ITestOutputHelper output)
+        {
+            static Uri getUriFromEnvironment(string name)
+            {
+                var env = Environment.GetEnvironmentVariable(name);
+                if (string.IsNullOrWhiteSpace(env))
+                {
+                    throw new NotSupportedException($"Missing environment variable {name}");
+                }
+                return new Uri(env);
+            };
+
+            _path = getUriFromEnvironment("SERVICE_URL");
+            _concurrency = 10;
+            _duration = 10;
+            _warmuUp = 5;
+        }
+
+        ///<summary>
+        /// Executes a basic load test using NBomber
+        ///</summary>
+        [Fact]
+        public void RunLoadTest()
+        {
+            // Load test settings
+            var warmUpPhase = TimeSpan.FromSeconds(_warmuUp); // execution time of warm-up before start bombing
+            var testDuration = TimeSpan.FromSeconds(_duration); // execution time of Scenario 
+            var concurrentCopies = _concurrency; // specify how many copies of current Scenario to run in parallel
+
+            // Assertions parameters
+            var acceptedFailNumber = 0;
+            var minRPS = 5;
+
+            // Execution step for the load scenario
+            var step = Step.Create(_stepName, async context =>
+            {
+                var response = await client.GetAsync(_path + "/sample/sumNumbersUpTo?value=100");
+                var success = response.IsSuccessStatusCode;
+                return success ? Response.Ok() : Response.Fail();
+            });
+
+            // List of assertions to be respected by the scenario for each step
+            var successAssertion = Assertion.ForStep(stepName: _stepName,
+                assertion: statistics => statistics.FailCount == acceptedFailNumber);
+            var rpsAssertion = Assertion.ForStep(stepName: _stepName,
+                assertion: statistics => statistics.RPS >= minRPS);
+        }
+    }
+}

Src/Contoso.sln

@@ -8,6 +8,10 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Contoso.UnitTests", "Contoso.UnitTests\Contoso.UnitTests.csproj", "{B219CDAD-7641-4ECB-8B96-EB47E25DE5AC}"
 EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "tests", "tests", "{0AAA7F28-054C-45C6-83A2-8FB787A7DF50}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Contoso.LoadTests", "Contoso.LoadTests\Contoso.LoadTests.csproj", "{55737DD5-84C3-4CFB-AC6A-14FB8E14FA37}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -22,10 +26,18 @@ Global
 		{B219CDAD-7641-4ECB-8B96-EB47E25DE5AC}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{B219CDAD-7641-4ECB-8B96-EB47E25DE5AC}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{B219CDAD-7641-4ECB-8B96-EB47E25DE5AC}.Release|Any CPU.Build.0 = Release|Any CPU
+		{55737DD5-84C3-4CFB-AC6A-14FB8E14FA37}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{55737DD5-84C3-4CFB-AC6A-14FB8E14FA37}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{55737DD5-84C3-4CFB-AC6A-14FB8E14FA37}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{55737DD5-84C3-4CFB-AC6A-14FB8E14FA37}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
 	EndGlobalSection
+	GlobalSection(NestedProjects) = preSolution
+		{B219CDAD-7641-4ECB-8B96-EB47E25DE5AC} = {0AAA7F28-054C-45C6-83A2-8FB787A7DF50}
+		{55737DD5-84C3-4CFB-AC6A-14FB8E14FA37} = {0AAA7F28-054C-45C6-83A2-8FB787A7DF50}
+	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {E55E11EA-AB0F-4280-943D-F6F1EC519DFB}
 	EndGlobalSection