added go_forward event in spec

Author: jonasjabari

spec/usage/components/transition_spec.rb

@@ -148,6 +148,13 @@ def page2
     expect(page).not_to have_content("This is Page 2")
     expect(page).to have_selector("body.not-reloaded")
     expect(page).to have_no_content(first_content_on_page_1)
+
+    page.go_forward
+
+    expect(page).to have_content("My Example App Layout")
+    expect(page).not_to have_content("This is Page 1")
+    expect(page).to have_content("This is Page 2")
+    expect(page).to have_selector("body.not-reloaded")
   end
 
   # supposed to work, but doesn't. Suspect Vue is the culprint here