added test for mass_action model

test/models/mass_action_test.rb

@@ -0,0 +1,20 @@
+require 'test_helper'
+
+class MassActionTest < ActiveSupport::TestCase
+  setup do
+    @csv_valid = Rails.root.join('test', 'fixtures', 'files', 'mass_actions', 'valid_mass_force_delete_list.csv').to_s
+    @csv_invalid = Rails.root.join('test', 'fixtures', 'files', 'mass_actions', 'invalid_mass_force_delete_list.csv').to_s
+  end
+
+  def test_mass_action_procces_with_valid_data     
+    assert MassAction.process("force_delete", @csv_valid)                       
+  end
+
+  def test_mass_action_proccess_with_invalid_data
+    assert_not MassAction.process("force_delete", @csv_invalid) 
+  end
+
+  def test_mass_action_invalid_attributes
+    assert_not MassAction.process("force_restart", @csv_valid)
+  end
+end