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-rw-r--r--activemodel/test/cases/attributes_dirty_test.rb205
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diff --git a/activemodel/test/cases/attributes_dirty_test.rb b/activemodel/test/cases/attributes_dirty_test.rb
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+# frozen_string_literal: true
+
+require "cases/helper"
+
+class AttributesDirtyTest < ActiveModel::TestCase
+ class DirtyModel
+ include ActiveModel::Model
+ include ActiveModel::Attributes
+ include ActiveModel::Dirty
+ attribute :name, :string
+ attribute :color, :string
+ attribute :size, :integer
+
+ def save
+ changes_applied
+ end
+
+ def reload
+ clear_changes_information
+ 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 attribute keys" 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 "checking if an attribute has changed to a particular value" do
+ @model.name = "Ringo"
+ assert @model.name_changed?(from: nil, to: "Ringo")
+ assert_not @model.name_changed?(from: "Pete", to: "Ringo")
+ assert @model.name_changed?(to: "Ringo")
+ assert_not @model.name_changed?(to: "Pete")
+ assert @model.name_changed?(from: nil)
+ assert_not @model.name_changed?(from: "Pete")
+ 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 "be consistent with symbols arguments after the changes are applied" do
+ @model.name = "David"
+ assert @model.attribute_changed?(:name)
+ @model.save
+ @model.name = "Rafael"
+ assert @model.attribute_changed?(:name)
+ end
+
+ test "attribute mutation" do
+ @model.name = "Yam"
+ @model.save
+ assert !@model.name_changed?
+ @model.name.replace("Hadad")
+ assert @model.name_changed?
+ end
+
+ test "resetting attribute" do
+ @model.name = "Bob"
+ @model.restore_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 "setting new attributes should not affect previous changes" do
+ @model.name = "Jericho Cane"
+ @model.save
+ @model.name = "DudeFella ManGuy"
+ assert_equal [nil, "Jericho Cane"], @model.name_previous_change
+ end
+
+ test "saving should preserve model's previous changed status" do
+ @model.name = "Jericho Cane"
+ @model.save
+ assert @model.name_previously_changed?
+ end
+
+ test "previous value is preserved when changed after save" do
+ assert_equal({}, @model.changed_attributes)
+ @model.name = "Paul"
+ assert_equal({ "name" => nil }, @model.changed_attributes)
+
+ @model.save
+
+ @model.name = "John"
+ assert_equal({ "name" => "Paul" }, @model.changed_attributes)
+ 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
+
+ test "using attribute_will_change! with a symbol" do
+ @model.size = 1
+ assert @model.size_changed?
+ end
+
+ test "reload should reset all changes" do
+ @model.name = "Dmitry"
+ @model.name_changed?
+ @model.save
+ @model.name = "Bob"
+
+ assert_equal [nil, "Dmitry"], @model.previous_changes["name"]
+ assert_equal "Dmitry", @model.changed_attributes["name"]
+
+ @model.reload
+
+ assert_equal ActiveSupport::HashWithIndifferentAccess.new, @model.previous_changes
+ assert_equal ActiveSupport::HashWithIndifferentAccess.new, @model.changed_attributes
+ end
+
+ test "restore_attributes should restore all previous data" do
+ @model.name = "Dmitry"
+ @model.color = "Red"
+ @model.save
+ @model.name = "Bob"
+ @model.color = "White"
+
+ @model.restore_attributes
+
+ assert_not @model.changed?
+ assert_equal "Dmitry", @model.name
+ assert_equal "Red", @model.color
+ end
+
+ test "restore_attributes can restore only some attributes" do
+ @model.name = "Dmitry"
+ @model.color = "Red"
+ @model.save
+ @model.name = "Bob"
+ @model.color = "White"
+
+ @model.restore_attributes(["name"])
+
+ assert @model.changed?
+ assert_equal "Dmitry", @model.name
+ assert_equal "White", @model.color
+ end
+
+ test "changing the attribute reports a change only when the cast value changes" do
+ @model.size = "2.3"
+ @model.save
+ @model.size = "2.1"
+
+ assert_equal false, @model.changed?
+
+ @model.size = "5.1"
+
+ assert_equal true, @model.changed?
+ assert_equal true, @model.size_changed?
+ assert_equal({ "size" => [2, 5] }, @model.changes)
+ end
+end