Add a system test to do an end-end test of changing email

test/system/user_email_change_test.rb

@@ -0,0 +1,35 @@
+require "application_system_test_case"
+
+class UserEmailChangeTest < ApplicationSystemTestCase
+  include ActionMailer::TestHelper
+
+  def setup
+    stub_request(:get, /.*gravatar.com.*d=404/).to_return(:status => 404)
+  end
+
+  test "User can change their email address" do
+    user = create(:user)
+    sign_in_as(user)
+
+    assert_emails 1 do
+      visit edit_account_path
+      fill_in "New Email Address", :with => "[email protected]"
+      click_on "Save Changes"
+      assert_equal "[email protected]", user.reload.new_email
+    end
+
+    email = ActionMailer::Base.deliveries.first
+    assert_equal 1, email.to.count
+    assert_equal "[email protected]", email.to.first
+    assert_match %r{/user/confirm-email\?confirm_string=[A-Za-z0-9-_%]+\s}, email.parts[0].parts[0].decoded
+
+    if email.parts[0].parts[0].decoded =~ %r{(/user/confirm-email\?confirm_string=[A-Za-z0-9-_%]+)\s}
+      visit Regexp.last_match(1)
+      assert page.has_css?("body.accounts-edit")
+    end
+
+    assert_equal "[email protected]", user.reload.email
+
+    ActionMailer::Base.deliveries.clear
+  end
+end