[ANN (Toy)]: Gold Rush

I was in a jewelry store, and I realized how hard it is to figure out the
markup on gold jewelry, so I did a little code kata...

Loads in 4.0 with:
    Gofer it
        smalltalkhubUser: 'SeanDeNigris' project: 'SeansPlayground';
        configurationOf: 'GoldRush';
        loadDevelopment.

    (#GoldRushSpecification asClass>>#testAcceptance) browse.

"You can describe a piece of jewelry like:"
        | ring |
        ring := GoldJewelry new
                weight: 4.1 grams;
                carats: 18;
                price: 275 dollars;
                yourself.

"And then see how much of a premium you're paying over the gold's melt value
e.g.:"
        ring markup should equal: ring price - expectedGoldValue.
        ring percentOverSpot percent should equal: ring price / expectedGoldValue -
1.

"If you inspect a GoldJewelry with GT Tools, you will see a special "Gold"
tab with the same calculated values (i.e. #markup  and #percentOverSpot)"
____________________________________

This was an interesting and fun test of Aconcagua, GT Tools, and Pharo 4.0
:)

n.b. it pulls the gold spot price off the web, updating daily.

Have fun!



-----
Cheers,
Sean
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