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ruby--ruby/spec/ruby/core/env/update_spec.rb

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require File.expand_path('../../../spec_helper', __FILE__)
describe "ENV.update" do
it "adds the parameter hash to ENV" do
ENV["foo"].should == nil
ENV.update "foo" => "bar"
ENV["foo"].should == "bar"
ENV.delete "foo"
end
it "yields key, the old value and the new value when replacing entries" do
ENV.update "foo" => "bar"
ENV["foo"].should == "bar"
ENV.update("foo" => "boo") do |key, old, new|
key.should == "foo"
old.should == "bar"
new.should == "boo"
"rab"
end
ENV["foo"].should == "rab"
ENV.delete "foo"
end
end