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require File.expand_path('../../../spec_helper', __FILE__)
require File.expand_path('../fixtures/classes', __FILE__)
describe "String#dup" do
before :each do
ScratchPad.clear
@obj = StringSpecs::InitializeString.new "string"
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 "copies instance variables" do
dup = @obj.dup
dup.ivar.should == 1
end
it "does not copy singleton methods" do
def @obj.special() :the_one end
dup = @obj.dup
lambda { dup.special }.should raise_error(NameError)
end
it "does not copy modules included in the singleton class" do
class << @obj
include StringSpecs::StringModule
end
dup = @obj.dup
lambda { 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
lambda { class << dup; CLONE; end }.should raise_error(NameError)
end
it "does not modify the original string when changing dupped string" do
orig = "string"[0..100]
dup = orig.dup
orig[0] = 'x'
orig.should == "xtring"
dup.should == "string"
end
end
|
