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require_relative '../../spec_helper'
require_relative 'fixtures/classes'
# NOTE: This is actually implemented by Module#initialize_copy
describe "Class#dup" do
it "duplicates both the class and the singleton class" do
klass = Class.new do
def hello
"hello"
end
def self.message
"text"
end
end
klass_dup = klass.dup
klass_dup.new.hello.should == "hello"
klass_dup.message.should == "text"
end
it "retains an included module in the ancestor chain for the singleton class" do
klass = Class.new
mod = Module.new do
def hello
"hello"
end
end
klass.extend(mod)
klass_dup = klass.dup
klass_dup.hello.should == "hello"
end
it "retains the correct ancestor chain for the singleton class" do
super_klass = Class.new do
def hello
"hello"
end
def self.message
"text"
end
end
klass = Class.new(super_klass)
klass_dup = klass.dup
klass_dup.new.hello.should == "hello"
klass_dup.message.should == "text"
end
it "sets the name from the class to nil if not assigned to a constant" do
copy = CoreClassSpecs::Record.dup
copy.name.should be_nil
end
it "stores the new name if assigned to a constant" do
CoreClassSpecs::RecordCopy = CoreClassSpecs::Record.dup
CoreClassSpecs::RecordCopy.name.should == "CoreClassSpecs::RecordCopy"
ensure
CoreClassSpecs.send(:remove_const, :RecordCopy)
end
it "raises TypeError if called on BasicObject" do
-> { BasicObject.dup }.should raise_error(TypeError, "can't copy the root class")
end
end
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