Much work.

test/controllers/users_controller_test.rb

@@ -0,0 +1,23 @@
+require "test_helper"
+
+class UsersControllerTest < ActionDispatch::IntegrationTest
+  test "should get index" do
+    get users_index_url
+    assert_response :success
+  end
+
+  test "should get show" do
+    get users_show_url
+    assert_response :success
+  end
+
+  test "should get edit" do
+    get users_edit_url
+    assert_response :success
+  end
+
+  test "should get update" do
+    get users_update_url
+    assert_response :success
+  end
+end