Add controller for Problems with index and show actions

test/controllers/problems_controller_test.rb

@@ -0,0 +1,14 @@
+require 'test_helper'
+
+class ProblemsControllerTest < ActionController::TestCase
+  test "should get index" do
+    get :index
+    assert_response :success
+  end
+
+  test "should get show" do
+    get :show, id: 1
+    assert_response :success
+  end
+
+end