require File.dirname(__FILE__) + '/../spec_helper'
require File.dirname(__FILE__) + '/../fixtures/class_variables'
 
describe "A class variable" do
  it "can be accessed from a subclass" do
    ClassVariablesSpec::ClassB.new.cvar_a.should == :cvar_a
  end
 
  it "is set in the superclass" do
    a = ClassVariablesSpec::ClassA.new
    b = ClassVariablesSpec::ClassB.new
    b.cvar_a = :new_val
 
    a.cvar_a.should == :new_val
  end
end
 
describe "A class variable defined in a module" do
  it "can be accessed from classes that extend the module" do
    ClassVariablesSpec::ClassC.cvar_m.should == :value
  end
 
  it "is not defined in these classes" do
    ClassVariablesSpec::ClassC.cvar_defined?.should be_false
  end
  
  it "is only updated in the module a method defined in the module is used" do
    ClassVariablesSpec::ClassC.cvar_m = "new value"
    ClassVariablesSpec::ClassC.cvar_m.should == "new value"
    
    ClassVariablesSpec::ClassC.cvar_defined?.should be_false
  end
  
  it "is updated in the class when a Method defined in the class is used" do
    ClassVariablesSpec::ClassC.cvar_c = "new value"    
    ClassVariablesSpec::ClassC.cvar_defined?.should be_true
  end
 
  it "can be accessed inside the class using the module methods" do
    ClassVariablesSpec::ClassC.cvar_c = "new value"
 
    ClassVariablesSpec::ClassC.cvar_m.should == "new value"
  end
 
  it "can be accessed from modules that extend the module" do
    ClassVariablesSpec::ModuleO.cvar_n.should == :value
  end
 
  it "is defined in the extended module" do
    ClassVariablesSpec::ModuleN.class_variable_defined?(:@@cvar_n).should be_true
  end
 
  it "is not defined in the extending module" do
    ClassVariablesSpec::ModuleO.class_variable_defined?(:@@cvar_n).should be_false
  end
end