stabilize tests

src/ReachGraph/StellaOps.ReachGraph.WebService/Program.cs

@@ -1,14 +1,15 @@
 // Licensed to StellaOps under the BUSL-1.1 license.
 
-using System.Threading.RateLimiting;
+
 using Microsoft.AspNetCore.RateLimiting;
 using Npgsql;
+using StackExchange.Redis;
 using StellaOps.ReachGraph.Cache;
 using StellaOps.ReachGraph.Hashing;
 using StellaOps.ReachGraph.Persistence;
 using StellaOps.ReachGraph.Serialization;
 using StellaOps.ReachGraph.WebService.Services;
-using StackExchange.Redis;
+using System.Threading.RateLimiting;
 
 var builder = WebApplication.CreateBuilder(args);
 
@@ -25,18 +26,22 @@ builder.Services.AddSwaggerGen(options =>
     });
 });
 
-// PostgreSQL
-var connectionString = builder.Configuration.GetConnectionString("PostgreSQL")
-    ?? throw new InvalidOperationException("PostgreSQL connection string not configured");
-var dataSourceBuilder = new NpgsqlDataSourceBuilder(connectionString);
-var dataSource = dataSourceBuilder.Build();
-builder.Services.AddSingleton(dataSource);
+// PostgreSQL (lazy so integration tests can replace before first resolve)
+builder.Services.AddSingleton<NpgsqlDataSource>(sp =>
+{
+    var config = sp.GetRequiredService<IConfiguration>();
+    var connStr = config.GetConnectionString("PostgreSQL")
+        ?? throw new InvalidOperationException("PostgreSQL connection string not configured");
+    return new NpgsqlDataSourceBuilder(connStr).Build();
+});
 
-// Redis/Valkey
-var redisConnectionString = builder.Configuration.GetConnectionString("Redis")
-    ?? "localhost:6379";
-var redis = ConnectionMultiplexer.Connect(redisConnectionString);
-builder.Services.AddSingleton<IConnectionMultiplexer>(redis);
+// Redis/Valkey (lazy so integration tests can replace before first resolve)
+builder.Services.AddSingleton<IConnectionMultiplexer>(sp =>
+{
+    var config = sp.GetRequiredService<IConfiguration>();
+    var redisConnStr = config.GetConnectionString("Redis") ?? "localhost:6379";
+    return ConnectionMultiplexer.Connect(redisConnStr);
+});
 
 // Core services
 builder.Services.AddSingleton<CanonicalReachGraphSerializer>();