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
test 'attribute_for_inspect with a string' do
t = topics(:first)
t.title = "The First Topic Now Has A Title With\nNewlines And More Than 50 Characters"
assert_equal '"The First Topic Now Has A Title With\nNewlines And ..."', t.attribute_for_inspect(:title)
end
test 'attribute_for_inspect with a date' do
t = topics(:first)
assert_equal %("#{t.written_on.to_s(:db)}"), t.attribute_for_inspect(:written_on)
end
test 'attribute_for_inspect with an array' do
t = topics(:first)
t.content = [Object.new]
assert_match %r(\[#<Object:0x[0-9a-f]+>\]), t.attribute_for_inspect(:content)
end
test 'attribute_for_inspect with a long array' do
t = topics(:first)
t.content = (1..11).to_a
assert_equal "[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11]", t.attribute_for_inspect(:content)
end
test 'attribute_present' do
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
test 'attribute_present with booleans' do
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
test 'caching a nil primary key' do
klass = Class.new(Minimalistic)
assert_called(klass, :reset_primary_key, returns: nil) do
2.times { klass.primary_key }
end
end
test 'attribute keys on a new instance' do
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
test 'boolean attributes' do
assert !Topic.find(1).approved?
assert Topic.find(2).approved?
end
test 'set attributes' do
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
test 'set attributes without a hash' do
topic = Topic.new
assert_raise(ArgumentError) { topic.attributes = '' }
end
test 'integers as nil' do
test = AutoId.create(value: '')
assert_nil AutoId.find(test.id).value
end
test 'set attributes with a block' do
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
test 'respond_to?' do
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
test 'respond_to? with a custom primary key' do
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
test 'id_before_type_cast with a custom primary key' do
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.
test 'respond_to? with an allocated object' do
klass = Class.new(ActiveRecord::Base) do
self.table_name = 'topics'
end
topic = klass.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.
test 'allocated objects can be inspected' do
topic = Topic.allocate
assert_equal "#<Topic not initialized>", topic.inspect
end
test 'array content' do
content = %w( one two three )
topic = Topic.new
topic.content = content
topic.save
assert_equal content, Topic.find(topic.id).content
end
test 'read attributes_before_type_cast' do
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?(:Mysql2Adapter)
test 'read attributes_before_type_cast on a boolean' do
bool = Boolean.create!({ "value" => false })
if RUBY_PLATFORM.include?('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
test 'read attributes_before_type_cast on a datetime' do
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
test 'read attributes_after_type_cast on a date' do
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
test 'hash content' do
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
test 'update array content' do
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
test 'case-sensitive attributes hash' do
# DB2 is not case-sensitive.
return true if current_adapter?(:DB2Adapter)
assert_equal @loaded_fixtures['computers']['workstation'].to_hash, Computer.first.attributes
end
test 'attributes without primary key' do
klass = Class.new(ActiveRecord::Base) do
self.table_name = 'developers_projects'
end
assert_equal klass.column_names, klass.new.attributes.keys
assert_not klass.new.has_attribute?('id')
end
test 'hashes are not mangled' do
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
test 'create through factory' do
topic = Topic.create(title: 'New Topic')
topicReloaded = Topic.find(topic.id)
assert_equal(topic, topicReloaded)
end
test 'write_attribute' do
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
test 'read_attribute' do
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
test 'read_attribute raises ActiveModel::MissingAttributeError when the attribute does not exist' do
computer = Computer.select('id').first
assert_raises(ActiveModel::MissingAttributeError) { computer[:developer] }
assert_raises(ActiveModel::MissingAttributeError) { computer[:extendedWarranty] }
assert_raises(ActiveModel::MissingAttributeError) { computer[:no_column_exists] = 'Hello!' }
assert_nothing_raised { computer[:developer] = 'Hello!' }
end
test 'read_attribute when false' do
topic = topics(:first)
topic.approved = false
assert !topic.approved?, "approved should be false"
topic.approved = "false"
assert !topic.approved?, "approved should be false"
end
test 'read_attribute when true' do
topic = topics(:first)
topic.approved = true
assert topic.approved?, "approved should be true"
topic.approved = "true"
assert topic.approved?, "approved should be true"
end
test 'boolean attributes writing and reading' do
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
test 'overridden write_attribute' do
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
test 'overridden read_attribute' do
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
test 'read overridden attribute' do
topic = Topic.new(title: 'a')
def topic.title() 'b' end
assert_equal 'a', topic[:title]
end
test 'string attribute predicate' do
[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
test 'number attribute predicate' do
[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
test 'boolean attribute predicate' do
[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
test 'custom field attribute predicate' do
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
test 'non-attribute read and write' do
topic = Topic.new
assert !topic.respond_to?("mumbo")
assert_raise(NoMethodError) { topic.mumbo }
assert_raise(NoMethodError) { topic.mumbo = 5 }
end
test 'undeclared attribute method does not affect respond_to? and method_missing' do
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
test 'declared prefixed attribute method affects respond_to? and method_missing' do
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
test 'declared suffixed attribute method affects respond_to? and method_missing' do
%w(_default _title_default _it! _candidate= able?).each do |suffix|
@target.class_eval "def attribute#{suffix}(*args) args end"
@target.attribute_method_suffix suffix
topic = @target.new(title: 'Budget')
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
test 'declared affixed attribute method affects respond_to? and method_missing' do
[['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)
topic = @target.new(title: 'Budget')
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
test 'should unserialize attributes for frozen records' do
myobj = { value1: :value2 }
topic = Topic.create(content: myobj)
topic.freeze
assert_equal myobj, topic.content
end
test 'typecast attribute from select to false' do
Topic.create(title: 'Budget')
# Oracle does not support boolean expressions in SELECT.
if current_adapter?(:OracleAdapter, :FbAdapter)
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
test 'typecast attribute from select to true' do
Topic.create(title: 'Budget')
# Oracle does not support boolean expressions in SELECT.
if current_adapter?(:OracleAdapter, :FbAdapter)
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
test 'raises ActiveRecord::DangerousAttributeError when defining an AR method in a model' do
%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
test 'converted values are returned after assignment' do
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
assert_equal "1337", developer.name
end
test 'write nil to time attribute' do
in_time_zone "Pacific Time (US & Canada)" do
record = @target.new
record.written_on = nil
assert_nil record.written_on
end
end
test 'write time to date attribute' do
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
test 'time attributes are retrieved in the current time zone' do
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
test 'setting a time zone-aware attribute to UTC' do
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
test 'setting time zone-aware attribute in other time zone' do
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
test 'setting time zone-aware read attribute' do
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
test 'setting time zone-aware attribute with a string' do
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
test 'time zone-aware attribute saved' do
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
test 'setting a time zone-aware attribute to a blank string returns nil' do
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
test 'setting a time zone-aware attribute interprets time zone-unaware string in time zone' do
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
test 'setting a time zone-aware datetime in the current time zone' do
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
test 'YAML dumping a record with time zone-aware attribute' do
in_time_zone "Pacific Time (US & Canada)" do
record = Topic.new(id: 1)
record.written_on = "Jan 01 00:00:00 2014"
assert_equal record, YAML.load(YAML.dump(record))
end
end
test 'setting a time zone-aware time in the current time zone' do
in_time_zone "Pacific Time (US & Canada)" do
record = @target.new
time_string = "10:00:00"
expected_time = Time.zone.parse("2000-01-01 #{time_string}")
record.bonus_time = time_string
assert_equal expected_time, record.bonus_time
assert_equal ActiveSupport::TimeZone["Pacific Time (US & Canada)"], record.bonus_time.time_zone
record.bonus_time = ''
assert_nil record.bonus_time
end
end
test 'setting a time zone-aware time with DST' do
in_time_zone "Pacific Time (US & Canada)" do
current_time = Time.zone.local(2014, 06, 15, 10)
record = @target.new(bonus_time: current_time)
time_before_save = record.bonus_time
record.save
record.reload
assert_equal time_before_save, record.bonus_time
assert_equal ActiveSupport::TimeZone["Pacific Time (US & Canada)"], record.bonus_time.time_zone
end
end
test 'removing time zone-aware types' do
with_time_zone_aware_types(:datetime) do
in_time_zone "Pacific Time (US & Canada)" do
record = @target.new(bonus_time: "10:00:00")
expected_time = Time.utc(2000, 01, 01, 10)
assert_equal expected_time, record.bonus_time
assert record.bonus_time.utc?
end
end
end
test 'time zone-aware attributes do not recurse infinitely on invalid values' do
in_time_zone "Pacific Time (US & Canada)" do
record = @target.new(bonus_time: [])
assert_equal nil, record.bonus_time
end
end
test 'setting a time_zone_conversion_for_attributes should write the value on a class variable' do
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
test 'attribute readers respect access control' do
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
test 'attribute writers respect access control' do
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
test 'attribute predicates respect access control' do
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
test 'bulk updates respect access control' do
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
test 'bulk update raises ActiveRecord::UnknownAttributeError' do
error = assert_raises(ActiveRecord::UnknownAttributeError) {
Topic.new(hello: "world")
}
assert_instance_of Topic, error.record
assert_equal "hello", error.attribute
assert_equal "unknown attribute 'hello' for Topic.", error.message
end
test 'method overrides in multi-level subclasses' do
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
test 'global methods are overwritten' do
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
test 'global methods are overwritten when subclassing' do
klass = Class.new(ActiveRecord::Base) do
self.abstract_class = true
end
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
test 'instance methods should be defined on the base class' do
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
test 'read_attribute with nil should not asplode' do
assert_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].)
test 'inherited custom accessors' do
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
test 'inherited custom accessors with reserved names' do
klass = Class.new(ActiveRecord::Base) do
self.table_name = 'computers'
self.abstract_class = true
def system; "omg"; end
def system=(val); self.developer = val; end
end
subklass = Class.new(klass)
[klass, subklass].each(&:define_attribute_methods)
computer = subklass.find(1)
assert_equal "omg", computer.system
computer.developer = 99
assert_equal 99, computer.developer
end
test 'on_the_fly_super_invokable_generated_attribute_methods_via_method_missing' do
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
test 'on-the-fly super-invokable generated attribute predicates via method_missing' do
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
test 'calling super when the parent does not define method raises NoMethodError' do
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
test 'attribute_method?' do
assert @target.attribute_method?(:title)
assert @target.attribute_method?(:title=)
assert_not @target.attribute_method?(:wibble)
end
test 'attribute_method? returns false if the table does not exist' do
@target.table_name = 'wibble'
assert_not @target.attribute_method?(:title)
end
test 'attribute_names on a new record' do
model = @target.new
assert_equal @target.column_names, model.attribute_names
end
test 'attribute_names on a queried record' do
model = @target.last!
assert_equal @target.column_names, model.attribute_names
end
test 'attribute_names with a custom select' do
model = @target.select('id').last!
assert_equal ['id'], model.attribute_names
# Sanity check, make sure other columns exist.
assert_not_equal ['id'], @target.column_names
end
test 'came_from_user?' do
model = @target.first
assert_not model.id_came_from_user?
model.id = "omg"
assert model.id_came_from_user?
end
test 'accessed_fields' do
model = @target.first
assert_equal [], model.accessed_fields
model.title
assert_equal ["title"], model.accessed_fields
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 with_time_zone_aware_types(*types)
old_types = ActiveRecord::Base.time_zone_aware_types
ActiveRecord::Base.time_zone_aware_types = types
yield
ensure
ActiveRecord::Base.time_zone_aware_types = old_types
end
def cached_columns
Topic.columns.map(&:name)
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