Added test_defaults_seed_and_load_into_empty_project

Added :defaults scopes to models
Added :sources and :formulas fixtures
Loading defaults from seeds.rb using rake task instead of migration

test/system/body_trackers_test.rb

@@ -1,4 +1,5 @@
 require File.expand_path('../../application_system_test_case', __FILE__)
+require 'rake'
 
 class BodyTrackersTest < BodyTrackingSystemTestCase
   def setup
@@ -7,12 +8,24 @@ class BodyTrackersTest < BodyTrackingSystemTestCase
     log_user 'jsmith', 'jsmith'
   end
 
-  def test_defaults_load
+  def test_defaults_seed_and_load_into_empty_project
+    Rails.application.load_tasks
+    Rake::Task['redmine:body_tracking:seed'].invoke
+    counts = [Source, Quantity, Formula, Unit].map do |model|
+      assoc = model.to_s.downcase.pluralize
+      @project1.send(assoc).delete_all unless assoc == 'formulas'
+      ["@project1.#{assoc}.reload.count", model.defaults.count]
+    end.to_h
+
     visit project_body_trackers_path(@project1)
-    accept_alert t('layouts.sidebar.confirm_defaults') do
-      click_link t('layouts.sidebar.link_defaults')
+    assert_difference counts do
+      accept_alert t('layouts.sidebar.confirm_defaults') do
+        click_link t('layouts.sidebar.link_defaults')
+      end
+      # click_link is asynchronuous, need to wait for page reload before
+      # checking differences
+      assert_selector 'div#flash_notice'
+      assert_no_selector 'div#flash_error'
     end
-    assert_selector 'div#flash_notice'
-    assert_no_selector 'div#flash_error'
   end
 end