test: add C NIF integration tests for web context

Add lightweight integration tests to verify:
- C NIF module loads properly in web application
- MIB library initializes successfully
- Standard MIB name resolution works
- MibTranslator wrapper functions correctly
- Error handling for invalid MIB names
- SNMP profiles can be loaded (uses MIB translation)

These tests verify the C NIF works end-to-end without checking
full page content, focusing on functional verification only.

test/towerops_web/integration/c_nif_integration_test.exs

@@ -0,0 +1,45 @@
+defmodule ToweropsWeb.Integration.CNifIntegrationTest do
+  @moduledoc """
+  Integration tests to verify the C NIF is properly loaded and functional
+  in the web application context.
+  """
+  use ToweropsWeb.ConnCase, async: true
+
+  alias Towerops.Profiles.YamlProfiles
+  alias Towerops.Snmp.MibTranslator
+
+  describe "C NIF initialization in web context" do
+    test "ToweropsNative module is loaded" do
+      assert Code.ensure_loaded?(ToweropsNative)
+    end
+
+    test "MIB library is initialized" do
+      result = ToweropsNative.init_mib_library()
+      assert result in ["initialized", "already_initialized"]
+    end
+
+    test "can resolve standard MIB names" do
+      assert "1.3.6.1.2.1.1.1" = ToweropsNative.resolve_oid("sysDescr")
+      assert "1.3.6.1.2.1.1.5" = ToweropsNative.resolve_oid("sysName")
+    end
+
+    test "MibTranslator wrapper works" do
+      assert {:ok, "1.3.6.1.2.1.1.1.0"} = MibTranslator.translate("1.3.6.1.2.1.1.1.0")
+      assert {:ok, _oid} = MibTranslator.translate("sysDescr")
+    end
+
+    test "handles invalid MIB names gracefully" do
+      assert {:error, _reason} = ToweropsNative.resolve_oid("nonExistentMibName")
+      assert {:error, :translation_failed} = MibTranslator.translate("INVALID-MIB::badObject")
+    end
+  end
+
+  describe "SNMP operations with C NIF" do
+    test "profile matching can use MIB resolution" do
+      # Verify that SNMP profiles can be loaded (they use MIB translation)
+      profiles = YamlProfiles.list_profiles()
+      assert is_list(profiles)
+      assert profiles != []
+    end
+  end
+end