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require_relative '../../spec_helper'
require_relative 'fixtures/common'
describe "Exception#dup" do
before :each do
@obj = ExceptionSpecs::InitializeException.new("my exception")
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 ExceptionSpecs::ExceptionModule
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 copy the message" do
@obj.dup.message.should == @obj.message
end
it "does copy the backtrace" do
begin
# Explicitly raise so a backtrace is associated with the exception.
# It's tempting to call `set_backtrace` instead, but that complicates
# the test because it might affect other state (e.g., instance variables)
# on some implementations.
raise ExceptionSpecs::InitializeException.new("my exception")
rescue => e
@obj = e
end
@obj.dup.backtrace.should == @obj.backtrace
end
it "does copy the cause" do
begin
raise StandardError, "the cause"
rescue StandardError => cause
begin
raise RuntimeError, "the consequence"
rescue RuntimeError => e
e.cause.should equal(cause)
e.dup.cause.should equal(cause)
end
end
end
end
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