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require_relative '../../spec_helper'
require_relative 'fixtures/classes'
require_relative 'shared/dup_clone'
describe "Kernel#dup" do
it_behaves_like :kernel_dup_clone, :dup
before :each do
ScratchPad.clear
@obj = KernelSpecs::Duplicate.new 1, :a
end
it "calls #initialize_copy on the new instance" do
dup = @obj.dup
ScratchPad.recorded.should_not == @obj.object_id
ScratchPad.recorded.should == dup.object_id
end
it "uses the internal allocator and does not call #allocate" do
klass = Class.new
instance = klass.new
def klass.allocate
raise "allocate should not be called"
end
dup = instance.dup
dup.class.should equal klass
end
it "does not copy frozen state from the original" do
@obj.freeze
dup = @obj.dup
dup.should_not.frozen?
end
it "copies instance variables" do
dup = @obj.dup
dup.one.should == 1
dup.two.should == :a
end
it "does not copy singleton methods" do
def @obj.special() :the_one end
dup = @obj.dup
-> { dup.special }.should raise_error(NameError)
end
it "does not copy modules included in the singleton class" do
class << @obj
include KernelSpecs::DuplicateM
end
dup = @obj.dup
-> { dup.repr }.should raise_error(NameError)
end
it "does not copy constants defined in the singleton class" do
class << @obj
CLONE = :clone
end
dup = @obj.dup
-> { class << dup; CLONE; end }.should raise_error(NameError)
end
end
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