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require 'cases/helper'
require 'models/book'
class EnumTest < ActiveRecord::TestCase
fixtures :books
setup do
@book = books(:awdr)
end
test "query state by predicate" do
assert @book.proposed?
assert_not @book.written?
assert_not @book.published?
assert @book.unread?
end
test "query state with strings" do
assert_equal "proposed", @book.status
assert_equal "unread", @book.read_status
end
test "find via scope" do
assert_equal @book, Book.proposed.first
assert_equal @book, Book.unread.first
end
test "update by declaration" do
@book.written!
assert @book.written?
end
test "update by setter" do
@book.update! status: :written
assert @book.written?
end
test "enum methods are overwritable" do
assert_equal "do publish work...", @book.published!
assert @book.published?
end
test "direct assignment" do
@book.status = :written
assert @book.written?
end
test "assign string value" do
@book.status = "written"
assert @book.written?
end
test "enum changed attributes" do
old_status = @book.status
@book.status = :published
assert_equal old_status, @book.changed_attributes[:status]
end
test "enum changes" do
old_status = @book.status
@book.status = :published
assert_equal [old_status, 'published'], @book.changes[:status]
end
test "enum attribute was" do
old_status = @book.status
@book.status = :published
assert_equal old_status, @book.attribute_was(:status)
end
test "enum attribute changed" do
@book.status = :published
assert @book.attribute_changed?(:status)
end
test "enum attribute changed to" do
@book.status = :published
assert @book.attribute_changed?(:status, to: 'published')
end
test "enum attribute changed from" do
old_status = @book.status
@book.status = :published
assert @book.attribute_changed?(:status, from: old_status)
end
test "enum attribute changed from old status to new status" do
old_status = @book.status
@book.status = :published
assert @book.attribute_changed?(:status, from: old_status, to: 'published')
end
test "enum didn't change" do
old_status = @book.status
@book.status = old_status
assert_not @book.attribute_changed?(:status)
end
test "persist changes that are dirty" do
@book.status = :published
assert @book.attribute_changed?(:status)
@book.status = :written
assert @book.attribute_changed?(:status)
end
test "reverted changes that are not dirty" do
old_status = @book.status
@book.status = :published
assert @book.attribute_changed?(:status)
@book.status = old_status
assert_not @book.attribute_changed?(:status)
end
test "reverted changes are not dirty going from nil to value and back" do
book = Book.create!(nullable_status: nil)
book.nullable_status = :married
assert book.attribute_changed?(:nullable_status)
book.nullable_status = nil
assert_not book.attribute_changed?(:nullable_status)
end
test "assign non existing value raises an error" do
e = assert_raises(ArgumentError) do
@book.status = :unknown
end
assert_equal "'unknown' is not a valid status", e.message
end
test "assign nil value" do
@book.status = nil
assert @book.status.nil?
end
test "assign empty string value" do
@book.status = ''
assert @book.status.nil?
end
test "assign long empty string value" do
@book.status = ' '
assert @book.status.nil?
end
test "constant to access the mapping" do
assert_equal 0, Book.statuses[:proposed]
assert_equal 1, Book.statuses["written"]
assert_equal 2, Book.statuses[:published]
end
test "building new objects with enum scopes" do
assert Book.written.build.written?
assert Book.read.build.read?
end
test "creating new objects with enum scopes" do
assert Book.written.create.written?
assert Book.read.create.read?
end
test "_before_type_cast returns the enum label (required for form fields)" do
assert_equal "proposed", @book.status_before_type_cast
end
test "reserved enum names" do
klass = Class.new(ActiveRecord::Base) do
self.table_name = "books"
enum status: [:proposed, :written, :published]
end
conflicts = [
:column, # generates class method .columns, which conflicts with an AR method
:logger, # generates #logger, which conflicts with an AR method
:attributes, # generates #attributes=, which conflicts with an AR method
]
conflicts.each_with_index do |name, i|
assert_raises(ArgumentError, "enum name `#{name}` should not be allowed") do
klass.class_eval { enum name => ["value_#{i}"] }
end
end
end
test "reserved enum values" do
klass = Class.new(ActiveRecord::Base) do
self.table_name = "books"
enum status: [:proposed, :written, :published]
end
conflicts = [
:new, # generates a scope that conflicts with an AR class method
:valid, # generates #valid?, which conflicts with an AR method
:save, # generates #save!, which conflicts with an AR method
:proposed, # same value as an existing enum
:public, :private, :protected, # some important methods on Module and Class
:name, :parent, :superclass
]
conflicts.each_with_index do |value, i|
assert_raises(ArgumentError, "enum value `#{value}` should not be allowed") do
klass.class_eval { enum "status_#{i}" => [value] }
end
end
end
test "overriding enum method should not raise" do
assert_nothing_raised do
Class.new(ActiveRecord::Base) do
self.table_name = "books"
def published!
super
"do publish work..."
end
enum status: [:proposed, :written, :published]
def written!
super
"do written work..."
end
end
end
end
test "validate uniqueness" do
klass = Class.new(ActiveRecord::Base) do
def self.name; 'Book'; end
enum status: [:proposed, :written]
validates_uniqueness_of :status
end
klass.delete_all
klass.create!(status: "proposed")
book = klass.new(status: "written")
assert book.valid?
book.status = "proposed"
assert_not book.valid?
end
test "validate inclusion of value in array" do
klass = Class.new(ActiveRecord::Base) do
def self.name; 'Book'; end
enum status: [:proposed, :written]
validates_inclusion_of :status, in: ["written"]
end
klass.delete_all
invalid_book = klass.new(status: "proposed")
assert_not invalid_book.valid?
valid_book = klass.new(status: "written")
assert valid_book.valid?
end
test "enums are distinct per class" do
klass1 = Class.new(ActiveRecord::Base) do
self.table_name = "books"
enum status: [:proposed, :written]
end
klass2 = Class.new(ActiveRecord::Base) do
self.table_name = "books"
enum status: [:drafted, :uploaded]
end
book1 = klass1.proposed.create!
book1.status = :written
assert_equal ['proposed', 'written'], book1.status_change
book2 = klass2.drafted.create!
book2.status = :uploaded
assert_equal ['drafted', 'uploaded'], book2.status_change
end
test "enums are inheritable" do
subklass1 = Class.new(Book)
subklass2 = Class.new(Book) do
enum status: [:drafted, :uploaded]
end
book1 = subklass1.proposed.create!
book1.status = :written
assert_equal ['proposed', 'written'], book1.status_change
book2 = subklass2.drafted.create!
book2.status = :uploaded
assert_equal ['drafted', 'uploaded'], book2.status_change
end
end
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