git.stella-ops.org/src/AirGap/StellaOps.AirGap.Policy/StellaOps.AirGap.Policy.Analyzers.Tests/PolicyAnalyzerRoslynTests.Diagnostics.AllowedAssemblies.cs

using FluentAssertions;
using StellaOps.TestKit;
using System;
using Xunit;

namespace StellaOps.AirGap.Policy.Analyzers.Tests;

public sealed partial class PolicyAnalyzerRoslynTests
{
    [Trait("Category", TestCategories.Unit)]
    [Fact]
    public async Task NoDiagnostic_InTestAssemblyAsync()
    {
        const string source = """
            using System.Net.Http;

            namespace Sample.App.Tests;

            public sealed class DemoTests
            {
                public void TestMethod()
                {
                    var client = new HttpClient();
                }
            }
            """;

        var diagnostics = await AnalyzeAsync(source, assemblyName: "Sample.App.Tests");
        diagnostics.Should().NotContain(d => d.Id == HttpClientUsageAnalyzer.DiagnosticId,
            "Test assemblies should be exempt from diagnostic");
    }

    [Trait("Category", TestCategories.Unit)]
    [Fact]
    public async Task NoDiagnostic_InPolicyAssemblyAsync()
    {
        const string source = """
            using System.Net.Http;

            namespace StellaOps.AirGap.Policy.Internal;

            internal static class Loopback
            {
                public static HttpClient Create() => new HttpClient();
            }
            """;

        var diagnostics = await AnalyzeAsync(source, assemblyName: "StellaOps.AirGap.Policy");
        diagnostics.Should().NotContain(d => d.Id == HttpClientUsageAnalyzer.DiagnosticId,
            "Policy assembly itself should be exempt");
    }
}