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require 'cases/helper'
# Stub out an AR-alike.
class DirtyTestSubject
def self.table_name; 'people' end
def self.primary_key; 'id' end
def self.attribute_method_suffix(*suffixes) suffixes end
def initialize(attrs = {}) @attributes = attrs end
def save
changed_attributes.clear
end
alias_method :save!, :save
def name; read_attribute('name') end
def name=(value); write_attribute('name', value) end
def name_was; attribute_was('name') end
def name_change; attribute_change('name') end
def name_changed?; attribute_changed?('name') end
private
def define_read_methods; nil end
def read_attribute(attr)
@attributes[attr]
end
def write_attribute(attr, value)
@attributes[attr] = value
end
end
# Include the module after the class is all set up.
DirtyTestSubject.module_eval { include ActiveRecord::Dirty }
class DirtyTest < Test::Unit::TestCase
def test_attribute_changes
# New record - no changes.
person = DirtyTestSubject.new
assert !person.name_changed?
assert_nil person.name_change
# Change name.
person.name = 'a'
assert person.name_changed?
assert_nil person.name_was
assert_equal [nil, 'a'], person.name_change
# Saved - no changes.
person.save!
assert !person.name_changed?
assert_nil person.name_change
# Same value - no changes.
person.name = 'a'
assert !person.name_changed?
assert_nil person.name_change
end
def test_object_should_be_changed_if_any_attribute_is_changed
person = DirtyTestSubject.new
assert !person.changed?
assert_equal [], person.changed
assert_equal Hash.new, person.changes
person.name = 'a'
assert person.changed?
assert_nil person.name_was
assert_equal %w(name), person.changed
assert_equal({'name' => [nil, 'a']}, person.changes)
person.save
assert !person.changed?
assert_equal [], person.changed
assert_equal({}, person.changes)
end
end
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