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Message: [QUOTE="Mel Bohince, post: 4466636"] Really enjoying Ruby so far, but now I'm confused. To help learn Ruby, I've been translating the Java code in the "Head First Design Patterns" book into Ruby, aware that many are built-in with Ruby. While mimicking the Decorator pattern I'm getting a strange failure to an assert_equal. The unit test excerpts: @e = Expresso.new @e.setSize('grande') @e = Mocha.new(@e) assert_equal(1.40, @e.cost(),"price check") --> pass @e = Mocha.new(@e) assert_equal("Expresso, Mocha, Mocha", @e.getDescription()) --> pass #puts @e.cost() --> 1.6 ##sanity check, should be 1.00 + 0.20 + 0.20 + 0.20 = 1.6 ##### assert_equal(1.6, @e.cost(),"price check2") --> fail with: 1) Failure: testConcreteCondiment(TestBeverages) [/Users/mel/Documents/Ruby_files/patterns/decorator/test/ testbeverages.rb:70]: price check2. <1.6> expected but was <1.6>. 5 tests, 21 assertions, 1 failures, 0 errors Recreated in irb, the instance looks like: => #<Mocha:0x7a884 @beverage=#<Mocha:0x21c94 @beverage=#<Expresso:0x58310 @description="Expresso", @size=0.2>>> Any clues to what I'm doing wrong? Is there a strategy to debug this kind of thing? The debugger is not like I'm use too. Thanks for any help you can offer. Ruby 1.8.2 on OSX 10.3.8 -: -: -: -: -: -: -: -: \|/ -: -: -: -: -: -: -: -: cU Mel Bohince Project Manager, Arkay Packaging Corporation [email]feet@att.net[/email] [/QUOTE]