From c60da3200421377a672944ce2e4f72aee20c2106 Mon Sep 17 00:00:00 2001
From: StuartFerguson <stuart_ferguson1development@outlook.com>
Date: Mon, 3 Aug 2026 13:09:37 +0100
Subject: [PATCH] test: verify merchant worker service graph

---
 .../MerchantRuntimeFactoryTests.cs            | 93 +++++++++++++++++++
 ...sactionProcessing.MerchantPos.Tests.csproj | 19 ++++
 TransactionProcessing.MerchantPos/Program.cs  | 18 ++++
 3 files changed, 130 insertions(+)
 create mode 100644 TransactionProcessing.MerchantPos.Tests/MerchantRuntimeFactoryTests.cs
 create mode 100644 TransactionProcessing.MerchantPos.Tests/TransactionProcessing.MerchantPos.Tests.csproj

diff --git a/TransactionProcessing.MerchantPos.Tests/MerchantRuntimeFactoryTests.cs b/TransactionProcessing.MerchantPos.Tests/MerchantRuntimeFactoryTests.cs
new file mode 100644
index 0000000..57a7d76
--- /dev/null
+++ b/TransactionProcessing.MerchantPos.Tests/MerchantRuntimeFactoryTests.cs
@@ -0,0 +1,93 @@
+using ClientProxyBase;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Logging.Abstractions;
+using MerchantPos.EF.Persistence;
+using SecurityService.Client;
+using Shared.Serialisation;
+using TransactionProcessing.MerchantPos.Persistence;
+using TransactionProcessing.MerchantPos.Runtime;
+using TransactionProcessor.Client;
+using Xunit;
+
+namespace TransactionProcessing.MerchantPos.Tests;
+
+public sealed class MerchantRuntimeFactoryTests
+{
+    [Fact]
+    public void Create_resolves_a_merchant_runtime_from_the_application_service_graph()
+    {
+        using var provider = BuildServiceProvider();
+        var factory = provider.GetRequiredService<IMerchantRuntimeFactory>();
+
+        var runtime = factory.Create(new MerchantConfig
+        {
+            MerchantId = Guid.NewGuid(),
+            MerchantName = "Test Merchant",
+            Enabled = true,
+            Username = "user",
+            Password = "password",
+            DeviceIdentifier = "device",
+            ApplicationVersion = "1.0.0"
+        });
+
+        Assert.NotNull(runtime);
+    }
+
+    private static ServiceProvider BuildServiceProvider()
+    {
+        var services = new ServiceCollection();
+
+        var configuration = new ConfigurationBuilder()
+            .AddInMemoryCollection(new Dictionary<string, string?>
+            {
+                ["ConnectionStrings:MerchantDb"] = "Data Source=:memory:",
+                ["ConnectionStrings:SettingsDb"] = "Data Source=:memory:",
+                ["WorkerSettings:ClientId"] = "client-id",
+                ["WorkerSettings:ClientSecret"] = "client-secret",
+                ["WorkerSettings:ServiceClientId"] = "service-client-id",
+                ["WorkerSettings:ServiceClientSecret"] = "service-client-secret",
+                ["ApiConfiguration:SecurityService"] = "https://security.example",
+                ["ApiConfiguration:TransactionProcessorACL"] = "https://processor-acl.example",
+                ["ApiConfiguration:TransactionProcessorApi"] = "https://processor-api.example",
+                ["ApiConfiguration:TestHost"] = "https://test-host.example"
+            })
+            .Build();
+
+        services.AddSingleton<IConfiguration>(configuration);
+        services.AddSingleton(SystemTextJsonSerializer.GetDefaultJsonSerializerOptions());
+        services.AddSingleton<IStringSerialiser, SystemTextJsonSerializer>();
+        services.AddSingleton<Func<object, string>>(_ => value => StringSerialiser.Serialise(value));
+        services.AddSingleton<Func<string, Type, object>>(_ => (json, type) => StringSerialiser.DeserializeObject<object>(json, type));
+        services.AddHttpContextAccessor();
+        services.AddSingleton<Func<string, string>>(sp =>
+        {
+            var apiConfiguration = sp.GetRequiredService<IConfiguration>().GetSection("ApiConfiguration");
+
+            return configSetting =>
+            {
+                if (string.IsNullOrWhiteSpace(configSetting))
+                {
+                    return string.Empty;
+                }
+
+                var child = apiConfiguration.GetChildren()
+                    .FirstOrDefault(c => string.Equals(c.Key, configSetting, StringComparison.OrdinalIgnoreCase));
+
+                return child?.Value ?? string.Empty;
+            };
+        });
+        services.AddSingleton<MerchantPosSettingsStore>();
+        services.AddSingleton<MerchantMetrics>();
+        services.AddSingleton<IMerchantRuntimeFactory, MerchantRuntimeFactory>();
+        services.AddDbContext<MerchantDbContext>(options => options.UseSqlite("Data Source=:memory:"));
+        services.AddScoped<IEfRepository, EfRepository>();
+        services.AddScoped<MerchantRuntime>();
+        services.RegisterHttpClient<ISecurityServiceClient, SecurityServiceClient>();
+        services.RegisterHttpClient<ITransactionProcessorClient, TransactionProcessorClient>();
+        services.RegisterHttpClient<IApiClient, ApiClient>();
+
+        return services.BuildServiceProvider();
+    }
+}
diff --git a/TransactionProcessing.MerchantPos.Tests/TransactionProcessing.MerchantPos.Tests.csproj b/TransactionProcessing.MerchantPos.Tests/TransactionProcessing.MerchantPos.Tests.csproj
new file mode 100644
index 0000000..f48d68d
--- /dev/null
+++ b/TransactionProcessing.MerchantPos.Tests/TransactionProcessing.MerchantPos.Tests.csproj
@@ -0,0 +1,19 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <TargetFramework>net10.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <IsPackable>false</IsPackable>
+  </PropertyGroup>
+  <ItemGroup>
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
+    <PackageReference Include="xunit" Version="2.9.2" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.8.2">
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+      <PrivateAssets>all</PrivateAssets>
+    </PackageReference>
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\TransactionProcessing.MerchantPos\TransactionProcessing.MerchantPos.csproj" />
+  </ItemGroup>
+</Project>
diff --git a/TransactionProcessing.MerchantPos/Program.cs b/TransactionProcessing.MerchantPos/Program.cs
index c0f9531..dbf2323 100644
--- a/TransactionProcessing.MerchantPos/Program.cs
+++ b/TransactionProcessing.MerchantPos/Program.cs
@@ -56,6 +56,24 @@
     builder.Services.AddSingleton(SystemTextJsonSerializer.GetDefaultJsonSerializerOptions());
     builder.Services.AddScoped<MerchantDashboardModelFactory>();
     builder.Services.AddRazorPages();
+    builder.Services.AddHttpContextAccessor();
+    builder.Services.AddSingleton<Func<string, string>>(sp =>
+    {
+        var apiConfiguration = sp.GetRequiredService<IConfiguration>().GetSection("ApiConfiguration");
+
+        return configSetting =>
+        {
+            if (string.IsNullOrWhiteSpace(configSetting))
+            {
+                return string.Empty;
+            }
+
+            var child = apiConfiguration.GetChildren()
+                .FirstOrDefault(c => string.Equals(c.Key, configSetting, StringComparison.OrdinalIgnoreCase));
+
+            return child?.Value ?? string.Empty;
+        };
+    });
 
     builder.Services.RegisterHttpClient<ISecurityServiceClient, SecurityServiceClient>();
     builder.Services.RegisterHttpClient<ITransactionProcessorClient, TransactionProcessorClient>();