diff --git a/test/wabanex_web/controllers/imc_controller_test.exs b/test/wabanex_web/controllers/imc_controller_test.exs
new file mode 100644
index 0000000..170c875
--- /dev/null
+++ b/test/wabanex_web/controllers/imc_controller_test.exs
@@ -0,0 +1,39 @@
+defmodule WabanexWeb.IMCControllerTest do
+  use WabanexWeb.ConnCase, async: true
+
+  describe "index/2" do
+    test "when all params are valid returns the imc info", %{conn: conn} do
+      params = %{"filename" => "students.csv"}
+
+      response =
+        conn
+        |> get(Routes.imc_path(conn, :index, params))
+        |> json_response(:ok)
+
+      expected_response = %{
+        "result" => %{
+          "Americo" => 24.508945765204302,
+          "Ana" => 21.30394857667585,
+          "Claudio" => 30.42184964845863,
+          "João" => 31.88775510204082,
+          "Luiz" => 27.777777777777775
+        }
+      }
+
+      assert expected_response == response
+    end
+
+    test "when params are invalid returns an error", %{conn: conn} do
+      params = %{"filename" => "unavailable.csv"}
+
+      response =
+        conn
+        |> get(Routes.imc_path(conn, :index, params))
+        |> json_response(:bad_request)
+
+      expected_response = %{"result" => "Error while opening the file"}
+
+      assert expected_response == response
+    end
+  end
+end