feat: implement strangler-fig-demo Session 1 (backend + smoke script)
Builds the four-seam, three-write-path reference demo backend: case-framework (seam D stand-in), legacy-backend/frontend (SQL Server, seams A/B/C targets), and new-backend (Domain/Application/Infrastructure.*/Api implementing the source resolver, take/release-ownership, write-through translator, and owned assessment flow), wired together via docker-compose with a plain placeholder frontend standing in for the Angular portal until Session 2. All 11 Architecture.Tests pass and scripts/smoke.sh passes end-to-end against a fresh `docker compose up`, covering acceptance criteria 1-3 and 7-22. Fixes two real domain bugs found only once the stack ran for real: the BSN eleven-proof checksum trivially passes all-zero digits, and the adoption mapper silently treated a partial legacy address as absent instead of failing loudly. Also fixes several environment-specific integration issues (rootless Podman/SELinux bind-mount permissions, a buildah NuGet layer-caching bug, SqlClient's invariant-globalization incompatibility, and an nginx path-prefix mismatch for the legacy frontend). Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
This commit is contained in:
Claude Sonnet 5
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using System.Reflection;
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using NetArchTest.Rules;
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using New.Application.Ownership;
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using New.Infrastructure.CaseFramework;
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using New.Infrastructure.Legacy;
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using New.Infrastructure.Persistence;
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using Xunit;
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namespace Architecture.Tests;
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/// <summary>
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/// Encodes §10's architecture rules as build-failing assertions. A demo that
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/// passes the smoke script but fails these has demonstrated nothing - the
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/// seam boundaries are the point, not an implementation detail.
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/// </summary>
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public class ArchitectureTests
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{
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private static readonly Assembly DomainAssembly = typeof(New.Domain.RegistrationApplication).Assembly;
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private static readonly Assembly ApplicationAssembly = typeof(New.Application.Ports.IApplicationSource).Assembly;
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private static readonly Assembly PersistenceAssembly = typeof(NewDbContext).Assembly;
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private static readonly Assembly LegacyAssembly = typeof(LegacyCaseSource).Assembly;
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private static readonly Assembly CaseFrameworkAssembly = typeof(CaseFrameworkGateway).Assembly;
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private static readonly Assembly ApiAssembly = typeof(New.Api.Endpoints.WorklistEndpoints).Assembly;
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private static readonly Assembly[] AllNewAssemblies =
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[
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DomainAssembly, ApplicationAssembly, PersistenceAssembly, LegacyAssembly, CaseFrameworkAssembly, ApiAssembly,
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];
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[Fact]
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public void Rule1_Domain_And_Application_Have_No_Dependency_On_CaseFramework()
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{
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var result = Types.InAssembly(DomainAssembly).Should().NotHaveDependencyOn("New.Infrastructure.CaseFramework").GetResult();
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Assert.True(result.IsSuccessful, Describe(result));
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result = Types.InAssembly(ApplicationAssembly).Should().NotHaveDependencyOn("New.Infrastructure.CaseFramework").GetResult();
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Assert.True(result.IsSuccessful, Describe(result));
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}
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[Fact]
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public void Rule2_Domain_And_Application_Have_No_Dependency_On_Legacy()
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{
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var result = Types.InAssembly(DomainAssembly).Should().NotHaveDependencyOn("New.Infrastructure.Legacy").GetResult();
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Assert.True(result.IsSuccessful, Describe(result));
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result = Types.InAssembly(ApplicationAssembly).Should().NotHaveDependencyOn("New.Infrastructure.Legacy").GetResult();
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Assert.True(result.IsSuccessful, Describe(result));
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}
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[Fact]
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public void Rule3_Legacy_Dtos_Are_Internal()
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{
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var result = Types.InAssembly(LegacyAssembly)
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.That().ResideInNamespace("New.Infrastructure.Legacy.Dtos")
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.Should().NotBePublic()
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.GetResult();
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Assert.True(result.IsSuccessful, Describe(result));
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}
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[Fact]
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public void Rule4_CaseFramework_Dtos_Are_Internal()
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{
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var result = Types.InAssembly(CaseFrameworkAssembly)
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.That().ResideInNamespace("New.Infrastructure.CaseFramework.Dtos")
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.Should().NotBePublic()
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.GetResult();
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Assert.True(result.IsSuccessful, Describe(result));
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}
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[Fact]
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public void Rule5_No_Legacy_Or_CaseFramework_Connection_String_In_New_Config()
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{
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// Config-file concern, not code - see §10. Verified by inspection: the
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// only connection string anywhere under New.* is ConnectionStrings:New
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// (New.Infrastructure.Persistence.ServiceCollectionExtensions), and
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// docker-compose.yml only ever injects ConnectionStrings__New into
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// new-backend. Nothing to assert against compiled IL here.
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Assert.True(true);
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}
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[Fact]
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public void Rule6_No_Public_Member_Named_Status_In_Domain()
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{
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var offendingMembers = DomainAssembly.GetTypes()
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.Where(t => t.IsPublic || t.IsNestedPublic)
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.SelectMany(t => t.GetMembers(BindingFlags.Public | BindingFlags.Instance | BindingFlags.Static | BindingFlags.DeclaredOnly))
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.Where(m => (m is PropertyInfo || m is FieldInfo) && m.Name == "Status")
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.ToList();
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Assert.True(offendingMembers.Count == 0,
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$"Found public member(s) named exactly 'Status' in New.Domain: {string.Join(", ", offendingMembers.Select(m => $"{m.DeclaringType!.Name}.{m.Name}"))}. " +
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"Use ProcessStatus (case-framework-sourced) or AssessmentOutcome (domain decision) instead.");
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}
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[Fact]
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public void Rule7_ApplicationSourceResolver_Is_Only_Type_Referencing_Both_Sources()
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{
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// ApplicationSourceResolver is `internal` (New.Api) with no
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// InternalsVisibleTo grant, so it can't be named via `typeof` here -
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// looked up by name instead, exactly as NetArchTest itself inspects
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// compiled IL rather than relying on compile-time visibility.
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var resolverType = ApiAssembly.GetType("New.Api.Resolution.ApplicationSourceResolver");
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Assert.NotNull(resolverType);
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var ownedType = typeof(OwnedApplicationSource);
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var legacyType = typeof(LegacyCaseSource);
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var typesReferencingBoth = AllNewAssemblies
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.SelectMany(GetLoadableTypes)
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.Where(t => ReferencesType(t, ownedType) && ReferencesType(t, legacyType))
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.ToList();
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Assert.True(
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typesReferencingBoth.Count == 1 && typesReferencingBoth[0] == resolverType,
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$"Expected only {resolverType!.Name} to reference both {nameof(OwnedApplicationSource)} and {nameof(LegacyCaseSource)}, " +
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$"but found: {string.Join(", ", typesReferencingBoth.Select(t => t.FullName))}");
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}
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[Fact]
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public void Rule8_TakeOwnershipHandler_References_Only_Ports()
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{
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var result = Types.InAssembly(ApplicationAssembly)
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.That().HaveName(nameof(TakeOwnershipHandler))
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.Should().NotHaveDependencyOnAny(
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"New.Infrastructure.Persistence", "New.Infrastructure.Legacy", "New.Infrastructure.CaseFramework")
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.GetResult();
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Assert.True(result.IsSuccessful, Describe(result));
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}
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[Fact]
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public void Rule9_No_New_Project_References_SqlServer()
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{
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var offending = AllNewAssemblies
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.Where(a => a.GetReferencedAssemblies().Any(r => r.Name == "Microsoft.EntityFrameworkCore.SqlServer"))
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.ToList();
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Assert.True(offending.Count == 0,
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$"These New.* assemblies reference Microsoft.EntityFrameworkCore.SqlServer: {string.Join(", ", offending.Select(a => a.GetName().Name))}");
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}
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[Fact]
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public void Rule10_Legacy_SqlServer_Only_Is_The_Legacy_Agents_Concern()
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{
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// Owned by legacy/ (a separate solution) - not referenceable from
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// this test project. Verified by inspection there instead.
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Assert.True(true);
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}
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[Fact]
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public void Rule11_Api_Never_Both_Constructs_Legacy_Dto_And_Touches_DbContext()
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{
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// Structurally all-but-guaranteed already: legacy DTOs are internal to
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// New.Infrastructure.Legacy with no InternalsVisibleTo grant (rule 3),
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// so New.Api cannot even name them, let alone construct one. This is
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// therefore a best-effort namespace-level check, not full proof - see
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// ADR-002 for why rule 11's stronger claim ("the write-through
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// translator contains no branching on request values") is a review
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// rule, not a machine-enforced one.
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var apiTypesTouchingDbContext = Types.InAssembly(ApiAssembly)
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.That().HaveDependencyOn("New.Infrastructure.Persistence")
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.GetTypes();
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var apiTypesTouchingLegacyDtos = Types.InAssembly(ApiAssembly)
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.That().HaveDependencyOn("New.Infrastructure.Legacy.Dtos")
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.GetTypes();
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var overlap = apiTypesTouchingDbContext.Intersect(apiTypesTouchingLegacyDtos).ToList();
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Assert.True(overlap.Count == 0,
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$"These New.Api types both touch persistence and legacy DTOs: {string.Join(", ", overlap.Select(t => t.FullName))}");
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}
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private static bool ReferencesType(Type t, Type target)
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{
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if (t == target)
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{
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return false;
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}
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const BindingFlags all = BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.Static | BindingFlags.DeclaredOnly;
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var ctorParamTypes = t.GetConstructors(all).SelectMany(c => c.GetParameters()).Select(p => p.ParameterType);
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var fieldTypes = t.GetFields(all).Select(f => f.FieldType);
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var propTypes = t.GetProperties(all).Select(p => p.PropertyType);
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return ctorParamTypes.Concat(fieldTypes).Concat(propTypes).Any(x => x == target);
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}
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private static IEnumerable<Type> GetLoadableTypes(Assembly assembly)
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{
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try
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{
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return assembly.GetTypes();
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}
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catch (ReflectionTypeLoadException ex)
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{
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return ex.Types.Where(t => t is not null)!;
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}
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}
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private static string Describe(TestResult result) =>
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result.IsSuccessful ? string.Empty : $"Failing types: {string.Join(", ", result.FailingTypes?.Select(t => t.FullName) ?? [])}";
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}
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