add removed test

Author: blva

tests/unit/common/session.test.ts

@@ -88,5 +88,17 @@ describe("Session", () => {
             // Should include the client name in the appName
             expect(connectionString).toContain("--test-device-id--test-client");
         });
+
+        it("should use 'unknown' for client name when agent runner is not set", async () => {
+            await session.connectToMongoDB("mongodb://localhost:27017", config.connectOptions);
+            expect(session.serviceProvider).toBeDefined();
+
+            const connectMock = MockNodeDriverServiceProvider.connect;
+            expect(connectMock).toHaveBeenCalledOnce();
+            const connectionString = connectMock.mock.calls[0]?.[0];
+
+            // Should use 'unknown' for client name when agent runner is not set
+            expect(connectionString).toContain("--test-device-id--unknown");
+        });
     });
 });