add testing gem

Gemfile

@@ -16,6 +16,9 @@ gem 'webpacker', '~> 5.0'
 gem 'turbolinks', '~> 5'
 # Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
 gem 'jbuilder', '~> 2.7'
+gem 'rexml', '~> 3.2', '>= 3.2.5'
+
+
 # Use Redis adapter to run Action Cable in production
 # gem 'redis', '~> 4.0'
 # Use Active Model has_secure_password

Gemfile.lock

@@ -178,6 +178,7 @@ GEM
     rb-inotify (0.10.1)
       ffi (~> 1.0)
     regexp_parser (2.1.1)
+    rexml (3.2.5)
     ruby-progressbar (1.11.0)
     rubyzip (2.3.0)
     sass-rails (6.0.0)
@@ -250,6 +251,7 @@ DEPENDENCIES
   rack-mini-profiler (~> 2.0)
   rails (~> 6.1.3, >= 6.1.3.2)
   rails-controller-testing (= 1.0.5)
+  rexml (~> 3.2, >= 3.2.5)
   sass-rails (>= 6)
   selenium-webdriver
   spring

app/views/static_pages/help.html.erb

@@ -3,4 +3,4 @@
 
 <div style="position: fixed; top: 10px; right: 100px" >
     hehe
-</div>
+</div>