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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 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 "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 "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
end
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