Minor spec update

Author: blocknotes

app/assets/javascripts/administrate-materialize-theme/theme.js

@@ -2,5 +2,6 @@
 
 // --- on ready ----------------------------------------------------------------
 document.addEventListener('DOMContentLoaded', () => {
-  M.AutoInit();
-});
+  M.AutoInit()
+  document.querySelector('body').classList.add('administrate-materialize-theme')
+})

spec/system/theme_spec.rb

@@ -10,5 +10,6 @@
     expect(page).to have_css('.app-container', style: { 'padding': '0px' })
     expect(page).to have_css('.main-content', style: { 'border-radius': '0px' })
     expect(page).to have_css('.main-content__body', style: { 'overflow-x': 'scroll' })
+    expect(page).to have_css('body.administrate-materialize-theme')
   end
 end