feat(historian): SqlServerHistorianProvider + SqlServer backend registration

Claude-Session: https://claude.ai/code/session_01Ef2ozxS7QPanGT8uoATbTe
2026-10-09 13:42:38 -04:00
parent a611cc358f
commit 7500106c2f
7 changed files with 181 additions and 0 deletions
@@ -306,4 +306,37 @@ public sealed class ServerHistorianOptionsValidatorTests
            () => _ = provider.GetRequiredService<IOptions<ServerHistorianOptions>>().Value);
        ex.Failures.ShouldContain(f => f.Contains("ServerHistorian:Endpoint"));
    }
+
+    private static ServerHistorianOptionsValidator SqlSut(string? connectionString)
+    {
+        var values = new Dictionary<string, string?> { ["AlarmHistorian:Enabled"] = "false" };
+        if (connectionString is not null) values["ServerHistorian:SqlServer:ConnectionString"] = connectionString;
+        return new ServerHistorianOptionsValidator(new ConfigurationBuilder().AddInMemoryCollection(values).Build());
+    }
+
+    /// <summary>SqlServer with a connection string passes; the gateway Endpoint/ApiKey/UseTls checks do not fire.</summary>
+    [Fact]
+    public void SqlServer_backend_with_connection_string_passes_without_gateway_settings()
+    {
+        var result = SqlSut("Server=localhost;Database=h").Validate(null,
+            new ServerHistorianOptions { Backend = "SqlServer", Enabled = true });
+
+        result.Failed.ShouldBeFalse(string.Join("; ", result.Failures ?? []));
+    }
+
+    /// <summary>SqlServer with no connection string fails, naming the key.</summary>
+    [Fact]
+    public void SqlServer_backend_without_connection_string_fails_naming_the_key()
+    {
+        var result = SqlSut(null).Validate(null, new ServerHistorianOptions { Backend = "SqlServer", Enabled = true });
+
+        result.Failed.ShouldBeTrue();
+        result.Failures.ShouldContain(f => f.Contains("ServerHistorian:SqlServer:ConnectionString"));
+        result.Failures.ShouldNotContain(f => f.Contains("ServerHistorian:Endpoint"));
+    }
+
+    /// <summary>Unconsumed SqlServer section (nothing enabled) is not validated.</summary>
+    [Fact]
+    public void SqlServer_backend_not_consumed_passes_without_connection_string() =>
+        SqlSut(null).Validate(null, new ServerHistorianOptions { Backend = "SqlServer" }).Failed.ShouldBeFalse();
 }