87 lines
3.4 KiB
Clojure
87 lines
3.4 KiB
Clojure
(ns the-great-game.merchants.markets-test
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(:require [clojure.test :refer :all]
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[the-great-game.utils :refer [deep-merge]]
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[the-great-game.world.world :refer [default-world]]
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[the-great-game.merchants.markets :refer :all]))
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(deftest new-price-test
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(testing "Adjustment of prices based on supply and demand"
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(is (> (new-price 1 0 10 10) 1)
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"If no stock but there is supply and demand, price should rise")
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(is (> (new-price 1 0 0 10) 1)
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"If no stock but there is demand, price should rise")
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(is (> (new-price 1 5 0 10) 1)
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"If there is insufficient stock to meet demand, price should rise")
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(is (= (new-price 1 10 0 10) 1)
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"If there is exactly sufficient stock to meet demand, price should not change")
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(is (< (new-price 1 10 0 5) 1)
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"If there is surplus stock beyond demand, price should fall")
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(is (> (new-price 1 0 0 10) (new-price 1 5 0 10))
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"The greater the relative undersupply, the more prices should rise")
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(is (< (new-price 1 10 0 0)(new-price 1 10 0 5) 1)
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"The greater the relative oversupply, the more prices should fall")
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))
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(deftest adjust-qunatity-and-price-test
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(testing "Adjustment in quantity and price: supply only."
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(let [world (deep-merge
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default-world
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{:cities
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{:falkirk
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{:stock {:iron 0}
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:supplies {:iron 12}}}})
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actual (adjust-quantity-and-price world :falkirk :iron)]
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(is
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(=
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(-> actual :cities :falkirk :stock :iron)
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(-> world :cities :falkirk :supplies :iron))
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"If stock is empty it should be topped up by supply amount."))
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(let [world (deep-merge
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default-world
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{:cities
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{:falkirk
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{:stock {:iron 5}
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:supplies {:iron 12}
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:prices {:iron 0.9}}}})
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actual (adjust-quantity-and-price world :falkirk :iron)]
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(is
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(=
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(-> actual :cities :falkirk :stock :iron)
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(-> world :cities :falkirk :supplies :iron))
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"If stock is not empty and price is below cost, stock should be topped up only to supply amount."))
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(let [world (deep-merge
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default-world
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{:cities
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{:falkirk
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{:stock {:iron 5}
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:supplies {:iron 12}
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:prices {:iron 1.1}}}})
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actual (adjust-quantity-and-price world :falkirk :iron)]
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(is
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(=
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(-> actual :cities :falkirk :stock :iron)
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(+ (-> world :cities :falkirk :supplies :iron)
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(-> world :cities :falkirk :stock :iron)))
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"If stock is not empty and price is above cost, stock should be topped up by supply amount.")))
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(testing "Adjustment in quantity and price: supply and demand."
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(let [world (deep-merge
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default-world
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{:cities
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{:falkirk
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{:stock {:iron 10}
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:demands {:iron 5}
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:supplies {:iron 12}
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:prices {:iron 1.1}}}})
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actual (adjust-quantity-and-price world :falkirk :iron)]
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(is
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(=
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(-> actual :cities :falkirk :stock :iron)
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17)
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"Stock should be topped up by the difference between the supply and
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the demand amount."))
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)
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)
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