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|
require "cases/helper"
require 'models/minimalistic'
require 'models/developer'
require 'models/auto_id'
require 'models/boolean'
require 'models/computer'
require 'models/topic'
require 'models/company'
require 'models/category'
require 'models/reply'
require 'models/contact'
require 'models/keyboard'
class AttributeMethodsTest < ActiveRecord::TestCase
include InTimeZone
fixtures :topics, :developers, :companies, :computers
def setup
@old_matchers = ActiveRecord::Base.send(:attribute_method_matchers).dup
@target = Class.new(ActiveRecord::Base)
@target.table_name = 'topics'
end
teardown do
ActiveRecord::Base.send(:attribute_method_matchers).clear
ActiveRecord::Base.send(:attribute_method_matchers).concat(@old_matchers)
end
def test_attribute_for_inspect
t = topics(:first)
t.title = "The First Topic Now Has A Title With\nNewlines And More Than 50 Characters"
assert_equal %("#{t.written_on.to_s(:db)}"), t.attribute_for_inspect(:written_on)
assert_equal '"The First Topic Now Has A Title With\nNewlines And ..."', t.attribute_for_inspect(:title)
end
def test_attribute_present
t = Topic.new
t.title = "hello there!"
t.written_on = Time.now
t.author_name = ""
assert t.attribute_present?("title")
assert t.attribute_present?("written_on")
assert !t.attribute_present?("content")
assert !t.attribute_present?("author_name")
end
def test_attribute_present_with_booleans
b1 = Boolean.new
b1.value = false
assert b1.attribute_present?(:value)
b2 = Boolean.new
b2.value = true
assert b2.attribute_present?(:value)
b3 = Boolean.new
assert !b3.attribute_present?(:value)
b4 = Boolean.new
b4.value = false
b4.save!
assert Boolean.find(b4.id).attribute_present?(:value)
end
def test_caching_nil_primary_key
klass = Class.new(Minimalistic)
klass.expects(:reset_primary_key).returns(nil).once
2.times { klass.primary_key }
end
def test_attribute_keys_on_new_instance
t = Topic.new
assert_equal nil, t.title, "The topics table has a title column, so it should be nil"
assert_raise(NoMethodError) { t.title2 }
end
def test_boolean_attributes
assert !Topic.find(1).approved?
assert Topic.find(2).approved?
end
def test_set_attributes
topic = Topic.find(1)
topic.attributes = { "title" => "Budget", "author_name" => "Jason" }
topic.save
assert_equal("Budget", topic.title)
assert_equal("Jason", topic.author_name)
assert_equal(topics(:first).author_email_address, Topic.find(1).author_email_address)
end
def test_set_attributes_without_hash
topic = Topic.new
assert_raise(ArgumentError) { topic.attributes = '' }
end
def test_integers_as_nil
test = AutoId.create('value' => '')
assert_nil AutoId.find(test.id).value
end
def test_set_attributes_with_block
topic = Topic.new do |t|
t.title = "Budget"
t.author_name = "Jason"
end
assert_equal("Budget", topic.title)
assert_equal("Jason", topic.author_name)
end
def test_respond_to?
topic = Topic.find(1)
assert_respond_to topic, "title"
assert_respond_to topic, "title?"
assert_respond_to topic, "title="
assert_respond_to topic, :title
assert_respond_to topic, :title?
assert_respond_to topic, :title=
assert_respond_to topic, "author_name"
assert_respond_to topic, "attribute_names"
assert !topic.respond_to?("nothingness")
assert !topic.respond_to?(:nothingness)
end
def test_respond_to_with_custom_primary_key
keyboard = Keyboard.create
assert_not_nil keyboard.key_number
assert_equal keyboard.key_number, keyboard.id
assert keyboard.respond_to?('key_number')
assert keyboard.respond_to?('id')
end
def test_id_before_type_cast_with_custom_primary_key
keyboard = Keyboard.create
keyboard.key_number = '10'
assert_equal '10', keyboard.id_before_type_cast
assert_equal nil, keyboard.read_attribute_before_type_cast('id')
assert_equal '10', keyboard.read_attribute_before_type_cast('key_number')
assert_equal '10', keyboard.read_attribute_before_type_cast(:key_number)
end
# Syck calls respond_to? before actually calling initialize
def test_respond_to_with_allocated_object
topic = Topic.allocate
assert !topic.respond_to?("nothingness")
assert !topic.respond_to?(:nothingness)
assert_respond_to topic, "title"
assert_respond_to topic, :title
end
# IRB inspects the return value of "MyModel.allocate".
def test_allocated_object_can_be_inspected
topic = Topic.allocate
assert_equal "#<Topic not initialized>", topic.inspect
end
def test_array_content
topic = Topic.new
topic.content = %w( one two three )
topic.save
assert_equal(%w( one two three ), Topic.find(topic.id).content)
end
def test_read_attributes_before_type_cast
category = Category.new({:name=>"Test category", :type => nil})
category_attrs = {"name"=>"Test category", "id" => nil, "type" => nil, "categorizations_count" => nil}
assert_equal category_attrs , category.attributes_before_type_cast
end
if current_adapter?(:MysqlAdapter)
def test_read_attributes_before_type_cast_on_boolean
bool = Boolean.create({ "value" => false })
if RUBY_PLATFORM =~ /java/
# JRuby will return the value before typecast as string
assert_equal "0", bool.reload.attributes_before_type_cast["value"]
else
assert_equal 0, bool.reload.attributes_before_type_cast["value"]
end
end
end
def test_read_attributes_before_type_cast_on_datetime
in_time_zone "Pacific Time (US & Canada)" do
record = @target.new
record.written_on = "345643456"
assert_equal "345643456", record.written_on_before_type_cast
assert_equal nil, record.written_on
record.written_on = "2009-10-11 12:13:14"
assert_equal "2009-10-11 12:13:14", record.written_on_before_type_cast
assert_equal Time.zone.parse("2009-10-11 12:13:14"), record.written_on
assert_equal ActiveSupport::TimeZone["Pacific Time (US & Canada)"], record.written_on.time_zone
end
end
def test_read_attributes_after_type_cast_on_datetime
tz = "Pacific Time (US & Canada)"
in_time_zone tz do
record = @target.new
date_string = "2011-03-24"
time = Time.zone.parse date_string
record.written_on = date_string
assert_equal date_string, record.written_on_before_type_cast
assert_equal time, record.written_on
assert_equal ActiveSupport::TimeZone[tz], record.written_on.time_zone
record.save
record.reload
assert_equal time, record.written_on
end
end
def test_hash_content
topic = Topic.new
topic.content = { "one" => 1, "two" => 2 }
topic.save
assert_equal 2, Topic.find(topic.id).content["two"]
topic.content_will_change!
topic.content["three"] = 3
topic.save
assert_equal 3, Topic.find(topic.id).content["three"]
end
def test_update_array_content
topic = Topic.new
topic.content = %w( one two three )
topic.content.push "four"
assert_equal(%w( one two three four ), topic.content)
topic.save
topic = Topic.find(topic.id)
topic.content << "five"
assert_equal(%w( one two three four five ), topic.content)
end
def test_case_sensitive_attributes_hash
# DB2 is not case-sensitive
return true if current_adapter?(:DB2Adapter)
assert_equal @loaded_fixtures['computers']['workstation'].to_hash, Computer.first.attributes
end
def test_hashes_not_mangled
new_topic = { :title => "New Topic" }
new_topic_values = { :title => "AnotherTopic" }
topic = Topic.new(new_topic)
assert_equal new_topic[:title], topic.title
topic.attributes= new_topic_values
assert_equal new_topic_values[:title], topic.title
end
def test_create_through_factory
topic = Topic.create("title" => "New Topic")
topicReloaded = Topic.find(topic.id)
assert_equal(topic, topicReloaded)
end
def test_write_attribute
topic = Topic.new
topic.send(:write_attribute, :title, "Still another topic")
assert_equal "Still another topic", topic.title
topic[:title] = "Still another topic: part 2"
assert_equal "Still another topic: part 2", topic.title
topic.send(:write_attribute, "title", "Still another topic: part 3")
assert_equal "Still another topic: part 3", topic.title
topic["title"] = "Still another topic: part 4"
assert_equal "Still another topic: part 4", topic.title
end
def test_read_attribute
topic = Topic.new
topic.title = "Don't change the topic"
assert_equal "Don't change the topic", topic.read_attribute("title")
assert_equal "Don't change the topic", topic["title"]
assert_equal "Don't change the topic", topic.read_attribute(:title)
assert_equal "Don't change the topic", topic[:title]
end
def test_read_attribute_raises_missing_attribute_error_when_not_exists
computer = Computer.select('id').first
assert_raises(ActiveModel::MissingAttributeError) { computer[:developer] }
assert_raises(ActiveModel::MissingAttributeError) { computer[:extendedWarranty] }
end
def test_read_attribute_when_false
topic = topics(:first)
topic.approved = false
assert !topic.approved?, "approved should be false"
topic.approved = "false"
assert !topic.approved?, "approved should be false"
end
def test_read_attribute_when_true
topic = topics(:first)
topic.approved = true
assert topic.approved?, "approved should be true"
topic.approved = "true"
assert topic.approved?, "approved should be true"
end
def test_read_write_boolean_attribute
topic = Topic.new
topic.approved = "false"
assert !topic.approved?, "approved should be false"
topic.approved = "false"
assert !topic.approved?, "approved should be false"
topic.approved = "true"
assert topic.approved?, "approved should be true"
topic.approved = "true"
assert topic.approved?, "approved should be true"
end
def test_overridden_write_attribute
topic = Topic.new
def topic.write_attribute(attr_name, value)
super(attr_name, value.downcase)
end
topic.send(:write_attribute, :title, "Yet another topic")
assert_equal "yet another topic", topic.title
topic[:title] = "Yet another topic: part 2"
assert_equal "yet another topic: part 2", topic.title
topic.send(:write_attribute, "title", "Yet another topic: part 3")
assert_equal "yet another topic: part 3", topic.title
topic["title"] = "Yet another topic: part 4"
assert_equal "yet another topic: part 4", topic.title
end
def test_overridden_read_attribute
topic = Topic.new
topic.title = "Stop changing the topic"
def topic.read_attribute(attr_name)
super(attr_name).upcase
end
assert_equal "STOP CHANGING THE TOPIC", topic.read_attribute("title")
assert_equal "STOP CHANGING THE TOPIC", topic["title"]
assert_equal "STOP CHANGING THE TOPIC", topic.read_attribute(:title)
assert_equal "STOP CHANGING THE TOPIC", topic[:title]
end
def test_read_overridden_attribute
topic = Topic.new(:title => 'a')
def topic.title() 'b' end
assert_equal 'a', topic[:title]
end
def test_query_attribute_string
[nil, "", " "].each do |value|
assert_equal false, Topic.new(:author_name => value).author_name?
end
assert_equal true, Topic.new(:author_name => "Name").author_name?
end
def test_query_attribute_number
[nil, 0, "0"].each do |value|
assert_equal false, Developer.new(:salary => value).salary?
end
assert_equal true, Developer.new(:salary => 1).salary?
assert_equal true, Developer.new(:salary => "1").salary?
end
def test_query_attribute_boolean
[nil, "", false, "false", "f", 0].each do |value|
assert_equal false, Topic.new(:approved => value).approved?
end
[true, "true", "1", 1].each do |value|
assert_equal true, Topic.new(:approved => value).approved?
end
end
def test_query_attribute_with_custom_fields
object = Company.find_by_sql(<<-SQL).first
SELECT c1.*, c2.type as string_value, c2.rating as int_value
FROM companies c1, companies c2
WHERE c1.firm_id = c2.id
AND c1.id = 2
SQL
assert_equal "Firm", object.string_value
assert object.string_value?
object.string_value = " "
assert !object.string_value?
assert_equal 1, object.int_value.to_i
assert object.int_value?
object.int_value = "0"
assert !object.int_value?
end
def test_non_attribute_access_and_assignment
topic = Topic.new
assert !topic.respond_to?("mumbo")
assert_raise(NoMethodError) { topic.mumbo }
assert_raise(NoMethodError) { topic.mumbo = 5 }
end
def test_undeclared_attribute_method_does_not_affect_respond_to_and_method_missing
topic = @target.new(:title => 'Budget')
assert topic.respond_to?('title')
assert_equal 'Budget', topic.title
assert !topic.respond_to?('title_hello_world')
assert_raise(NoMethodError) { topic.title_hello_world }
end
def test_declared_prefixed_attribute_method_affects_respond_to_and_method_missing
topic = @target.new(:title => 'Budget')
%w(default_ title_).each do |prefix|
@target.class_eval "def #{prefix}attribute(*args) args end"
@target.attribute_method_prefix prefix
meth = "#{prefix}title"
assert topic.respond_to?(meth)
assert_equal ['title'], topic.send(meth)
assert_equal ['title', 'a'], topic.send(meth, 'a')
assert_equal ['title', 1, 2, 3], topic.send(meth, 1, 2, 3)
end
end
def test_declared_suffixed_attribute_method_affects_respond_to_and_method_missing
topic = @target.new(:title => 'Budget')
%w(_default _title_default _it! _candidate= able?).each do |suffix|
@target.class_eval "def attribute#{suffix}(*args) args end"
@target.attribute_method_suffix suffix
meth = "title#{suffix}"
assert topic.respond_to?(meth)
assert_equal ['title'], topic.send(meth)
assert_equal ['title', 'a'], topic.send(meth, 'a')
assert_equal ['title', 1, 2, 3], topic.send(meth, 1, 2, 3)
end
end
def test_declared_affixed_attribute_method_affects_respond_to_and_method_missing
topic = @target.new(:title => 'Budget')
[['mark_', '_for_update'], ['reset_', '!'], ['default_', '_value?']].each do |prefix, suffix|
@target.class_eval "def #{prefix}attribute#{suffix}(*args) args end"
@target.attribute_method_affix({ :prefix => prefix, :suffix => suffix })
meth = "#{prefix}title#{suffix}"
assert topic.respond_to?(meth)
assert_equal ['title'], topic.send(meth)
assert_equal ['title', 'a'], topic.send(meth, 'a')
assert_equal ['title', 1, 2, 3], topic.send(meth, 1, 2, 3)
end
end
def test_should_unserialize_attributes_for_frozen_records
myobj = {:value1 => :value2}
topic = Topic.create("content" => myobj)
topic.freeze
assert_equal myobj, topic.content
end
def test_typecast_attribute_from_select_to_false
Topic.create(:title => 'Budget')
# Oracle does not support boolean expressions in SELECT
if current_adapter?(:OracleAdapter)
topic = Topic.all.merge!(:select => "topics.*, 0 as is_test").first
else
topic = Topic.all.merge!(:select => "topics.*, 1=2 as is_test").first
end
assert !topic.is_test?
end
def test_typecast_attribute_from_select_to_true
Topic.create(:title => 'Budget')
# Oracle does not support boolean expressions in SELECT
if current_adapter?(:OracleAdapter)
topic = Topic.all.merge!(:select => "topics.*, 1 as is_test").first
else
topic = Topic.all.merge!(:select => "topics.*, 2=2 as is_test").first
end
assert topic.is_test?
end
def test_raises_dangerous_attribute_error_when_defining_activerecord_method_in_model
%w(save create_or_update).each do |method|
klass = Class.new ActiveRecord::Base
klass.class_eval "def #{method}() 'defined #{method}' end"
assert_raise ActiveRecord::DangerousAttributeError do
klass.instance_method_already_implemented?(method)
end
end
end
def test_only_time_related_columns_are_meant_to_be_cached_by_default
expected = %w(datetime time date).sort
assert_equal expected, ActiveRecord::Base.attribute_types_cached_by_default.map(&:to_s).sort
end
def test_declaring_attributes_as_cached_adds_them_to_the_attributes_cached_by_default
default_attributes = Topic.cached_attributes
Topic.cache_attributes :replies_count
expected = default_attributes + ["replies_count"]
assert_equal expected.sort, Topic.cached_attributes.sort
Topic.instance_variable_set "@cached_attributes", nil
end
def test_cacheable_columns_are_actually_cached
assert_equal cached_columns.sort, Topic.cached_attributes.sort
end
def test_accessing_cached_attributes_caches_the_converted_values_and_nothing_else
t = topics(:first)
cache = t.instance_variable_get "@attributes_cache"
assert_not_nil cache
assert cache.empty?
all_columns = Topic.columns.map(&:name)
uncached_columns = all_columns - cached_columns
all_columns.each do |attr_name|
attribute_gets_cached = Topic.cache_attribute?(attr_name)
val = t.send attr_name unless attr_name == "type"
if attribute_gets_cached
assert cached_columns.include?(attr_name)
assert_equal val, cache[attr_name]
else
assert uncached_columns.include?(attr_name)
assert !cache.include?(attr_name)
end
end
end
def test_converted_values_are_returned_after_assignment
developer = Developer.new(name: 1337, salary: "50000")
assert_equal "50000", developer.salary_before_type_cast
assert_equal 1337, developer.name_before_type_cast
assert_equal 50000, developer.salary
assert_equal "1337", developer.name
developer.save!
assert_equal "50000", developer.salary_before_type_cast
assert_equal 1337, developer.name_before_type_cast
assert_equal 50000, developer.salary
assert_equal "1337", developer.name
end
def test_write_nil_to_time_attributes
in_time_zone "Pacific Time (US & Canada)" do
record = @target.new
record.written_on = nil
assert_nil record.written_on
end
end
def test_write_time_to_date_attributes
in_time_zone "Pacific Time (US & Canada)" do
record = @target.new
record.last_read = Time.utc(2010, 1, 1, 10)
assert_equal Date.civil(2010, 1, 1), record.last_read
end
end
def test_time_attributes_are_retrieved_in_current_time_zone
in_time_zone "Pacific Time (US & Canada)" do
utc_time = Time.utc(2008, 1, 1)
record = @target.new
record[:written_on] = utc_time
assert_equal utc_time, record.written_on # record.written on is equal to (i.e., simultaneous with) utc_time
assert_kind_of ActiveSupport::TimeWithZone, record.written_on # but is a TimeWithZone
assert_equal ActiveSupport::TimeZone["Pacific Time (US & Canada)"], record.written_on.time_zone # and is in the current Time.zone
assert_equal Time.utc(2007, 12, 31, 16), record.written_on.time # and represents time values adjusted accordingly
end
end
def test_setting_time_zone_aware_attribute_to_utc
in_time_zone "Pacific Time (US & Canada)" do
utc_time = Time.utc(2008, 1, 1)
record = @target.new
record.written_on = utc_time
assert_equal utc_time, record.written_on
assert_equal ActiveSupport::TimeZone["Pacific Time (US & Canada)"], record.written_on.time_zone
assert_equal Time.utc(2007, 12, 31, 16), record.written_on.time
end
end
def test_setting_time_zone_aware_attribute_in_other_time_zone
utc_time = Time.utc(2008, 1, 1)
cst_time = utc_time.in_time_zone("Central Time (US & Canada)")
in_time_zone "Pacific Time (US & Canada)" do
record = @target.new
record.written_on = cst_time
assert_equal utc_time, record.written_on
assert_equal ActiveSupport::TimeZone["Pacific Time (US & Canada)"], record.written_on.time_zone
assert_equal Time.utc(2007, 12, 31, 16), record.written_on.time
end
end
def test_setting_time_zone_aware_read_attribute
utc_time = Time.utc(2008, 1, 1)
cst_time = utc_time.in_time_zone("Central Time (US & Canada)")
in_time_zone "Pacific Time (US & Canada)" do
record = @target.create(:written_on => cst_time).reload
assert_equal utc_time, record[:written_on]
assert_equal ActiveSupport::TimeZone["Pacific Time (US & Canada)"], record[:written_on].time_zone
assert_equal Time.utc(2007, 12, 31, 16), record[:written_on].time
end
end
def test_setting_time_zone_aware_attribute_with_string
utc_time = Time.utc(2008, 1, 1)
(-11..13).each do |timezone_offset|
time_string = utc_time.in_time_zone(timezone_offset).to_s
in_time_zone "Pacific Time (US & Canada)" do
record = @target.new
record.written_on = time_string
assert_equal Time.zone.parse(time_string), record.written_on
assert_equal ActiveSupport::TimeZone["Pacific Time (US & Canada)"], record.written_on.time_zone
assert_equal Time.utc(2007, 12, 31, 16), record.written_on.time
end
end
end
def test_time_zone_aware_attribute_saved
in_time_zone 1 do
record = @target.create(:written_on => '2012-02-20 10:00')
record.written_on = '2012-02-20 09:00'
record.save
assert_equal Time.zone.local(2012, 02, 20, 9), record.reload.written_on
end
end
def test_setting_time_zone_aware_attribute_to_blank_string_returns_nil
in_time_zone "Pacific Time (US & Canada)" do
record = @target.new
record.written_on = ' '
assert_nil record.written_on
assert_nil record[:written_on]
end
end
def test_setting_time_zone_aware_attribute_interprets_time_zone_unaware_string_in_time_zone
time_string = 'Tue Jan 01 00:00:00 2008'
(-11..13).each do |timezone_offset|
in_time_zone timezone_offset do
record = @target.new
record.written_on = time_string
assert_equal Time.zone.parse(time_string), record.written_on
assert_equal ActiveSupport::TimeZone[timezone_offset], record.written_on.time_zone
assert_equal Time.utc(2008, 1, 1), record.written_on.time
end
end
end
def test_setting_time_zone_aware_attribute_in_current_time_zone
utc_time = Time.utc(2008, 1, 1)
in_time_zone "Pacific Time (US & Canada)" do
record = @target.new
record.written_on = utc_time.in_time_zone
assert_equal utc_time, record.written_on
assert_equal ActiveSupport::TimeZone["Pacific Time (US & Canada)"], record.written_on.time_zone
assert_equal Time.utc(2007, 12, 31, 16), record.written_on.time
end
end
def test_setting_time_zone_conversion_for_attributes_should_write_value_on_class_variable
Topic.skip_time_zone_conversion_for_attributes = [:field_a]
Minimalistic.skip_time_zone_conversion_for_attributes = [:field_b]
assert_equal [:field_a], Topic.skip_time_zone_conversion_for_attributes
assert_equal [:field_b], Minimalistic.skip_time_zone_conversion_for_attributes
end
def test_read_attributes_respect_access_control
privatize("title")
topic = @target.new(:title => "The pros and cons of programming naked.")
assert !topic.respond_to?(:title)
exception = assert_raise(NoMethodError) { topic.title }
assert exception.message.include?("private method")
assert_equal "I'm private", topic.send(:title)
end
def test_write_attributes_respect_access_control
privatize("title=(value)")
topic = @target.new
assert !topic.respond_to?(:title=)
exception = assert_raise(NoMethodError) { topic.title = "Pants"}
assert exception.message.include?("private method")
topic.send(:title=, "Very large pants")
end
def test_question_attributes_respect_access_control
privatize("title?")
topic = @target.new(:title => "Isaac Newton's pants")
assert !topic.respond_to?(:title?)
exception = assert_raise(NoMethodError) { topic.title? }
assert exception.message.include?("private method")
assert topic.send(:title?)
end
def test_bulk_update_respects_access_control
privatize("title=(value)")
assert_raise(ActiveRecord::UnknownAttributeError) { @target.new(:title => "Rants about pants") }
assert_raise(ActiveRecord::UnknownAttributeError) { @target.new.attributes = { :title => "Ants in pants" } }
end
def test_bulk_update_raise_unknown_attribute_errro
error = assert_raises(ActiveRecord::UnknownAttributeError) {
@target.new(:hello => "world")
}
assert @target, error.record
assert "hello", error.attribute
assert "unknown attribute: hello", error.message
end
def test_methods_override_in_multi_level_subclass
klass = Class.new(Developer) do
def name
"dev:#{read_attribute(:name)}"
end
end
2.times { klass = Class.new klass }
dev = klass.new(name: 'arthurnn')
dev.save!
assert_equal 'dev:arthurnn', dev.reload.name
end
def test_global_methods_are_overwritten
klass = Class.new(ActiveRecord::Base) do
self.table_name = 'computers'
end
assert !klass.instance_method_already_implemented?(:system)
computer = klass.new
assert_nil computer.system
end
def test_global_methods_are_overwritte_when_subclassing
klass = Class.new(ActiveRecord::Base) { self.abstract_class = true }
subklass = Class.new(klass) do
self.table_name = 'computers'
end
assert !klass.instance_method_already_implemented?(:system)
assert !subklass.instance_method_already_implemented?(:system)
computer = subklass.new
assert_nil computer.system
end
def test_instance_method_should_be_defined_on_the_base_class
subklass = Class.new(Topic)
Topic.define_attribute_methods
instance = subklass.new
instance.id = 5
assert_equal 5, instance.id
assert subklass.method_defined?(:id), "subklass is missing id method"
Topic.undefine_attribute_methods
assert_equal 5, instance.id
assert subklass.method_defined?(:id), "subklass is missing id method"
end
def test_read_attribute_with_nil_should_not_asplode
assert_equal nil, Topic.new.read_attribute(nil)
end
# If B < A, and A defines an accessor for 'foo', we don't want to override
# that by defining a 'foo' method in the generated methods module for B.
# (That module will be inserted between the two, e.g. [B, <GeneratedAttributes>, A].)
def test_inherited_custom_accessors
klass = new_topic_like_ar_class do
self.abstract_class = true
def title; "omg"; end
def title=(val); self.author_name = val; end
end
subklass = Class.new(klass)
[klass, subklass].each(&:define_attribute_methods)
topic = subklass.find(1)
assert_equal "omg", topic.title
topic.title = "lol"
assert_equal "lol", topic.author_name
end
def test_on_the_fly_super_invokable_generated_attribute_methods_via_method_missing
klass = new_topic_like_ar_class do
def title
super + '!'
end
end
real_topic = topics(:first)
assert_equal real_topic.title + '!', klass.find(real_topic.id).title
end
def test_on_the_fly_super_invokable_generated_predicate_attribute_methods_via_method_missing
klass = new_topic_like_ar_class do
def title?
!super
end
end
real_topic = topics(:first)
assert_equal !real_topic.title?, klass.find(real_topic.id).title?
end
def test_calling_super_when_parent_does_not_define_method_raises_error
klass = new_topic_like_ar_class do
def some_method_that_is_not_on_super
super
end
end
assert_raise(NoMethodError) do
klass.new.some_method_that_is_not_on_super
end
end
private
def new_topic_like_ar_class(&block)
klass = Class.new(ActiveRecord::Base) do
self.table_name = 'topics'
class_eval(&block)
end
assert_empty klass.generated_attribute_methods.instance_methods(false)
klass
end
def cached_columns
Topic.columns.map(&:name) - Topic.serialized_attributes.keys
end
def time_related_columns_on_topic
Topic.columns.select { |c| [:time, :date, :datetime, :timestamp].include?(c.type) }
end
def privatize(method_signature)
@target.class_eval(<<-private_method, __FILE__, __LINE__ + 1)
private
def #{method_signature}
"I'm private"
end
private_method
end
end
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