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require 'spec_helper'
require 'extlib/class'
class Grandparent
end
class Parent < Grandparent
end
class Child < Parent
end
class Parent
end
class Grandparent
class_inheritable_accessor :last_name, :_attribute
self._attribute = 1900
end
class ClassWithInheritableSymbolAccessor
class_inheritable_accessor :symbol
self.symbol = :foo
end
class ClassInheritingSymbolAccessor < ClassWithInheritableSymbolAccessor
end
describe Class, "#inheritable_accessor" do
after :each do
Grandparent.send(:remove_instance_variable, "@last_name") rescue nil
Parent.send(:remove_instance_variable, "@last_name") rescue nil
Child.send(:remove_instance_variable, "@last_name") rescue nil
end
it 'inherits from parent unless overriden' do
Parent._attribute.should == 1900
Child._attribute.should == 1900
end
it 'inherits from grandparent unless overriden' do
Child._attribute.should == 1900
end
it "inherits even if the accessor is made after the inheritance" do
Grandparent.last_name = "Merb"
Parent.last_name.should == "Merb"
Child.last_name.should == "Merb"
end
it "supports ||= to change a child" do
Parent.last_name ||= "Merb"
Grandparent.last_name.should == nil
Parent.last_name.should == "Merb"
Child.last_name.should == "Merb"
end
it "supports << to change a child when the parent is an Array" do
Grandparent.last_name = ["Merb"]
Parent.last_name << "Core"
Grandparent.last_name.should == ["Merb"]
Parent.last_name.should == ["Merb", "Core"]
end
it "supports ! methods on an Array" do
Grandparent.last_name = %w(Merb Core)
Parent.last_name.reverse!
Grandparent.last_name.should == %w(Merb Core)
Parent.last_name.should == %w(Core Merb)
end
it "support modifying a parent Hash" do
Grandparent.last_name = {"Merb" => "name"}
Parent.last_name["Core"] = "name"
Parent.last_name.should == {"Merb" => "name", "Core" => "name"}
Grandparent.last_name.should == {"Merb" => "name"}
end
it "supports hard-merging a parent Hash" do
Grandparent.last_name = {"Merb" => "name"}
Parent.last_name.merge!("Core" => "name")
Parent.last_name.should == {"Merb" => "name", "Core" => "name"}
Grandparent.last_name.should == {"Merb" => "name"}
end
it "supports changes to the parent even if the child has already been read" do
Child.last_name
Grandparent.last_name = "Merb"
Child.last_name.should == "Merb"
end
it "handles nil being set midstream" do
Child.last_name
Parent.last_name = nil
Grandparent.last_name = "Merb"
Child.last_name.should == nil
end
it "handles false being used in Parent" do
Child.last_name
Parent.last_name = false
Grandparent.last_name = "Merb"
Child.last_name.should == false
end
it "handles the grandparent changing the value (as long as the child isn't read first)" do
Grandparent.last_name = "Merb"
Grandparent.last_name = "Core"
Child.last_name.should == "Core"
end
end
describe Class, "#inheritable_accessor (of type Symbol)" do
it "should not raise" do
lambda { ClassInheritingSymbolAccessor.symbol }.should_not raise_error(TypeError)
end
end
#
# The bug that prompted this estoric spec was found in
# the wild when using dm-is-versioned with c_i_w.
#
module Plugin
def self.included(base)
base.class_eval do
class_inheritable_writer :plugin_options
class_inheritable_reader :plugin_options
self.plugin_options = :foo
end
end
end
class Model
def self.new
model = Class.new
model.send(:include, Plugin)
model
end
include Plugin
self.const_set("Version", Model.new)
end
describe Class, "#inheritable_accessor" do
it "uses object_id for comparison" do
Model.methods.map { |m| m.to_sym }.should be_include(:plugin_options)
Model.plugin_options.should == :foo
Model::Version.methods.map { |m| m.to_sym }.should be_include(:plugin_options)
Model::Version.plugin_options.should == :foo
end
end
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