C#: Integration test for 'dotnet test'.

csharp/ql/integration-tests/posix-only/dotnet_test/UnitTest1.cs

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+using NUnit.Framework;
+
+namespace dotnet_test;
+
+public class Tests
+{
+    [SetUp]
+    public void Setup()
+    {
+    }
+
+    [Test]
+    public void Test1()
+    {
+        Assert.Pass();
+    }
+}

csharp/ql/integration-tests/posix-only/dotnet_test/dotnet_test.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net6.0</TargetFramework>
+    <Nullable>enable</Nullable>
+
+    <IsPackable>false</IsPackable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.11.0" />
+    <PackageReference Include="NUnit" Version="3.13.2" />
+    <PackageReference Include="NUnit3TestAdapter" Version="4.0.0" />
+    <PackageReference Include="coverlet.collector" Version="3.1.0" />
+  </ItemGroup>
+
+</Project>

csharp/ql/integration-tests/posix-only/dotnet_test/test.py

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+from create_database_utils import *
+
+run_codeql_database_create(['dotnet test'], test_db="default-db", db=None, lang="csharp")