Test made using Mockito and JUnit

javax-servlets/src/main/java/com/root/FormServlet.java

@@ -7,6 +7,7 @@ import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 import java.io.IOException;
+import java.io.PrintWriter;
 
 @WebServlet(name = "FormServlet", urlPatterns = "/calculateServlet")
 public class FormServlet extends HttpServlet {
@@ -19,9 +20,12 @@ public class FormServlet extends HttpServlet {
         String weight = request.getParameter("weight");
 
         try {
-            Double bmi = calculateBMI(Double.parseDouble(weight), Double.parseDouble(height));
-
+            double bmi = calculateBMI(Double.parseDouble(weight), Double.parseDouble(height));
             request.setAttribute("bmi", bmi);
+
+            PrintWriter out= response.getWriter();
+            out.write(String.valueOf(bmi));
+
             RequestDispatcher dispatcher = request.getRequestDispatcher("index.jsp");
             dispatcher.forward(request, response);
         } catch (Exception e) {
@@ -30,15 +34,8 @@ public class FormServlet extends HttpServlet {
         }
     }
 
-    @Override
-    protected void doGet(HttpServletRequest request, HttpServletResponse response)
-            throws ServletException, IOException {
-
-        // do something else here
-    }
-
     private Double calculateBMI(Double weight, Double height) {
 
         return weight / (height * height);
     }
-}
+}