require "cases/helper" class DirtyTest < ActiveModel::TestCase class DirtyModel include ActiveModel::Dirty define_attribute_methods :name, :color def initialize @name = nil @color = nil end def name @name end def name=(val) name_will_change! @name = val end def color @color end def color=(val) color_will_change! unless val == @color @color = val end def save @previously_changed = changes @changed_attributes.clear end end setup do @model = DirtyModel.new end test "setting attribute will result in change" do assert !@model.changed? assert !@model.name_changed? @model.name = "Ringo" assert @model.changed? assert @model.name_changed? end test "list of changed attributes" do assert_equal [], @model.changed @model.name = "Paul" assert_equal ['name'], @model.changed end test "changes to attribute values" do assert !@model.changes['name'] @model.name = "John" assert_equal [nil, "John"], @model.changes['name'] end test "changes accessible through both strings and symbols" do @model.name = "David" assert_not_nil @model.changes[:name] assert_not_nil @model.changes['name'] end test "attribute mutation" do @model.instance_variable_set("@name", "Yam") assert !@model.name_changed? @model.name.replace("Hadad") assert !@model.name_changed? @model.name_will_change! @model.name.replace("Baal") assert @model.name_changed? end test "resetting attribute" do @model.name = "Bob" @model.reset_name! assert_nil @model.name assert !@model.name_changed? end test "setting color to same value should not result in change being recorded" do @model.color = "red" assert @model.color_changed? @model.save assert !@model.color_changed? assert !@model.changed? @model.color = "red" assert !@model.color_changed? assert !@model.changed? end test "saving should reset model's changed status" do @model.name = "Alf" assert @model.changed? @model.save assert !@model.changed? assert !@model.name_changed? end test "saving should preserve previous changes" do @model.name = "Jericho Cane" @model.save assert_equal [nil, "Jericho Cane"], @model.previous_changes['name'] end test "changing the same attribute multiple times retains the correct original value" do @model.name = "Otto" @model.save @model.name = "DudeFella ManGuy" @model.name = "Mr. Manfredgensonton" assert_equal ["Otto", "Mr. Manfredgensonton"], @model.name_change assert_equal @model.name_was, "Otto" end end