472 lines
29 KiB
Clojure
472 lines
29 KiB
Clojure
(ns mw-parser.core-test
|
|
(:use clojure.pprint
|
|
mw-engine.core
|
|
mw-engine.world)
|
|
(:require [clojure.test :refer :all]
|
|
[mw-parser.core :refer :all]))
|
|
|
|
(deftest primitives-tests
|
|
(testing "Simple functions supporting the parser"
|
|
(is (= (parse-simple-value '()) nil)
|
|
"if there's nothing to parse, return nil")
|
|
(is (= (first (parse-simple-value '("1234" "and" "that"))) 1234)
|
|
"a simple value is expected to be just a number.")
|
|
(is (= (first (parse-simple-value '("this" "and" "that"))) :this)
|
|
"or else just a keyword")
|
|
(is (= (first (parse-simple-value '("this" "and" "that") true))
|
|
'(get-int cell :this))
|
|
"...unless an integer is explicitly sought, in which case it should be something which gets an integer from the current cell")
|
|
(is (= (parse-value '()) nil)
|
|
"if there's nothing to parse, return nil")
|
|
(is (= (first (parse-value '("1234" "and" "that"))) 1234)
|
|
"a simple value is expected to be just a number.")
|
|
(is (= (first (parse-value '("this" "and" "that"))) :this)
|
|
"or else just a keyword")
|
|
(is (= (first (parse-value '("this" "and" "that") true))
|
|
'(get-int cell :this))
|
|
"...unless an integer is explicitly sought, in which case it should be something which gets an integer from the current cell")
|
|
(is (= (parse-property-value '()) nil)
|
|
"if there's nothing to parse, return nil")
|
|
(is (= (first (parse-property-value '("this" "and" "that"))) '(:this cell))
|
|
"Parsing a property value returns a code function to pull its value off the current cell")
|
|
))
|
|
|
|
|
|
(deftest rules-tests
|
|
(testing "Rule parser - does not test whether generated functions actually work, just that something is generated!"
|
|
(is (parse-rule "if altitude is less than 100 and state is forest then state should be climax and deer should be 3"))
|
|
(is (parse-rule "if altitude is 100 or fertility is 25 then state should be heath and fertility should be 24.3"))
|
|
(is (parse-rule "if altitude is 100 or fertility is 25 then state should be heath"))
|
|
(is (parse-rule "if deer is more than 2 and wolves is 0 and fertility is more than 20 then deer should be deer + 2"))
|
|
(is (parse-rule "if deer is more than 1 and wolves is more than 1 then deer should be deer - wolves"))
|
|
(is (parse-rule "if state is grassland and 4 neighbours have state equal to water then state should be village"))
|
|
(is (parse-rule "if state is forest and fertility is between 55 and 75 then state should be climax"))
|
|
(is (parse-rule "if 6 neighbours have state equal to water then state should be village"))
|
|
(is (parse-rule "if state is in grassland or pasture or heath and 4 neighbours are water then state should be village"))
|
|
(is (parse-rule "if state is climax and some neighbours have state equal to fire then 3 chance in 5 state should be fire"))
|
|
(is (parse-rule "if state is pasture and more than 3 neighbours have state equal to scrub then state should be scrub"))
|
|
))
|
|
|
|
(deftest exception-tests
|
|
(testing "Constructions which should cause exceptions to be thrown"
|
|
(is (thrown-with-msg? Exception #"^I did not understand.*"
|
|
(parse-rule "the quick brown fox jumped over the lazy dog"))
|
|
"Exception thrown if rule text does not match grammar")
|
|
(is (thrown-with-msg?
|
|
Exception #"The properties 'x' and 'y' of a cell are reserved and should not be set in rule actions"
|
|
(parse-rule "if state is new then x should be 0"))
|
|
"Exception thrown on attempt to set 'x'")
|
|
(is (thrown-with-msg?
|
|
Exception #"The properties 'x' and 'y' of a cell are reserved and should not be set in rule actions"
|
|
(parse-rule "if state is new then y should be 0"))
|
|
"Exception thrown on attempt to set 'y'")
|
|
(is (thrown? Exception (compile-rule "if state is new then x should be 0"))
|
|
"Can't set x property to number, as this would break the world")
|
|
(is (thrown? Exception (compile-rule "if state is new then y should be 0"))
|
|
"Can't set y property to number, as this would break the world")
|
|
(is (thrown? Exception (compile-rule "if state is new then x should be heath"))
|
|
"Can't set x property to symbol, as this would break the world")
|
|
(is (thrown? Exception (compile-rule "if state is new then y should be heath"))
|
|
"Can't set y property to symbol, as this would break the world")
|
|
))
|
|
|
|
(deftest correctness-tests
|
|
(testing "Simplest possible rule"
|
|
(let [afn (compile-rule "if state is new then state should be grassland")]
|
|
(is (= (apply afn (list {:state :new} nil))
|
|
{:state :grassland})
|
|
"Rule fires when condition is met")
|
|
(is (nil? (apply afn (list {:state :forest} nil))))
|
|
"Rule doesn't fire when condition isn't met"))
|
|
|
|
(testing "Condition conjunction rule"
|
|
(let [afn (compile-rule "if state is new and altitude is 0 then state should be water")]
|
|
(is (= (apply afn (list {:state :new :altitude 0} nil))
|
|
{:state :water :altitude 0})
|
|
"Rule fires when conditions are met")
|
|
(is (nil? (apply afn (list {:state :new :altitude 5} nil)))
|
|
"Rule does not fire: second condition not met")
|
|
(is (nil? (apply afn (list {:state :forest :altitude 0} nil)))
|
|
"Rule does not fire: first condition not met")))
|
|
|
|
(testing "Condition disjunction rule"
|
|
(let [afn (compile-rule "if state is new or state is waste then state should be grassland")]
|
|
(is (= (apply afn (list {:state :new} nil))
|
|
{:state :grassland})
|
|
"Rule fires: first condition met")
|
|
(is (= (apply afn (list {:state :waste} nil))
|
|
{:state :grassland})
|
|
"Rule fires: second condition met")
|
|
(is (nil? (apply afn (list {:state :forest} nil)))
|
|
"Rule does not fire: neither condition met")))
|
|
|
|
(testing "Simple negation rule"
|
|
(let [afn (compile-rule "if state is not new then state should be grassland")]
|
|
(is (nil? (apply afn (list {:state :new} nil)))
|
|
"Rule doesn't fire when condition isn't met")
|
|
(is (= (apply afn (list {:state :forest} nil))
|
|
{:state :grassland})
|
|
"Rule fires when condition is met")))
|
|
|
|
(testing "Can't set x or y properties")
|
|
|
|
(testing "Simple list membership rule"
|
|
(let [afn (compile-rule "if state is in heath or scrub or forest then state should be climax")]
|
|
(is (= (apply afn (list {:state :heath} nil))
|
|
{:state :climax})
|
|
"Rule fires when condition is met")
|
|
(is (= (apply afn (list {:state :scrub} nil))
|
|
{:state :climax})
|
|
"Rule fires when condition is met")
|
|
(is (= (apply afn (list {:state :forest} nil))
|
|
{:state :climax})
|
|
"Rule fires when condition is met")
|
|
(is (nil? (apply afn (list {:state :grassland} nil)))
|
|
"Rule does not fire when condition is not met")))
|
|
|
|
(testing "Negated list membership rule"
|
|
(let [afn (compile-rule "if state is not in heath or scrub or forest then state should be climax")]
|
|
(is (nil? (apply afn (list {:state :heath} nil)))
|
|
"Rule does not fire when condition is not met")
|
|
(is (nil? (apply afn (list {:state :scrub} nil)))
|
|
"Rule does not fire when condition is not met")
|
|
(is (nil? (apply afn (list {:state :forest} nil)))
|
|
"Rule does not fire when condition is not met")
|
|
(is (= (apply afn (list {:state :grassland} nil))
|
|
{:state :climax})
|
|
"Rule fires when condition is met")))
|
|
|
|
(testing "Property is more than numeric-value"
|
|
(let [afn (compile-rule "if altitude is more than 200 then state should be snow")]
|
|
(is (= (apply afn (list {:altitude 201} nil))
|
|
{:state :snow :altitude 201})
|
|
"Rule fires when condition is met")
|
|
(is (nil? (apply afn (list {:altitude 200} nil)))
|
|
"Rule does not fire when condition is not met")))
|
|
|
|
(testing "Property is more than property"
|
|
(let [afn (compile-rule "if wolves are more than deer then deer should be 0")]
|
|
(is (= (apply afn (list {:deer 2 :wolves 3} nil))
|
|
{:deer 0 :wolves 3})
|
|
"Rule fires when condition is met")
|
|
(is (nil? (apply afn (list {:deer 3 :wolves 2} nil)))
|
|
"Rule does not fire when condition is not met")))
|
|
|
|
(testing "Property is less than numeric-value"
|
|
(let [afn (compile-rule "if altitude is less than 10 then state should be water")]
|
|
(is (= (apply afn (list {:altitude 9} nil))
|
|
{:state :water :altitude 9})
|
|
"Rule fires when condition is met")
|
|
(is (nil? (apply afn (list {:altitude 10} nil)))
|
|
"Rule does not fire when condition is not met")))
|
|
|
|
(testing "Property is less than property"
|
|
(let [afn (compile-rule "if wolves are less than deer then deer should be deer - wolves")]
|
|
(is (= (apply afn (list {:deer 3 :wolves 2} nil))
|
|
{:deer 1 :wolves 2})
|
|
"Rule fires when condition is met")
|
|
(is (nil? (apply afn (list {:deer 2 :wolves 3} nil)))
|
|
"Rule does not fire when condition is not met")))
|
|
|
|
(testing "Number neighbours have property equal to value"
|
|
(let [afn (compile-rule "if 3 neighbours have state equal to new then state should be water")
|
|
world (make-world 3 3)]
|
|
(is (= (apply afn (list {:x 0 :y 0} world))
|
|
{:state :water :x 0 :y 0})
|
|
"Rule fires when condition is met (in a new world all cells are new, corner cell has three neighbours)")
|
|
(is (nil? (apply afn (list {:x 1 :y 1} world)))
|
|
"Middle cell has eight neighbours, so rule does not fire."))
|
|
(let [afn (compile-rule "if 3 neighbours are new then state should be water")
|
|
world (make-world 3 3)]
|
|
;; 'are new' should be the same as 'have state equal to new'
|
|
(is (= (apply afn (list {:x 0 :y 0} world))
|
|
{:state :water :x 0 :y 0})
|
|
"Rule fires when condition is met (in a new world all cells are new, corner cell has three neighbours)")
|
|
(is (nil? (apply afn (list {:x 1 :y 1} world)))
|
|
"Middle cell has eight neighbours, so rule does not fire.")))
|
|
|
|
(testing "Number neighbours have property more than numeric-value"
|
|
(let [afn (compile-rule "if 3 neighbours have altitude more than 10 then state should be beach")
|
|
world (transform-world
|
|
(make-world 3 3)
|
|
(list (compile-rule "if x is 2 then altitude should be 11")
|
|
(compile-rule "if x is less than 2 then altitude should be 0")))]
|
|
(is (= (:state (apply afn (list {:x 1 :y 1} world))) :beach)
|
|
"Rule fires when condition is met (strip of altitude 11 down right hand side)")
|
|
(is (nil? (apply afn (list {:x 2 :y 1} world)))
|
|
"Middle cell of the strip has only two high neighbours, so rule should not fire.")))
|
|
|
|
(testing "Number neighbours have property less than numeric-value"
|
|
(let [afn (compile-rule "if 5 neighbours have altitude less than 10 then state should be beach")
|
|
world (transform-world
|
|
(make-world 3 3)
|
|
(list (compile-rule "if x is 2 then altitude should be 11")
|
|
(compile-rule "if x is less than 2 then altitude should be 0")))]
|
|
(is (= (:state (apply afn (list {:x 1 :y 1} world))) :beach)
|
|
"Rule fires when condition is met (strip of altitude 11 down right hand side)")
|
|
(is (nil? (apply afn (list {:x 2 :y 1} world)))
|
|
"Middle cell of the strip has two high neighbours, so rule should not fire.")))
|
|
|
|
(testing "More than number neighbours have property equal to numeric-value"
|
|
(let [afn (compile-rule "if more than 2 neighbours have altitude equal to 11 then state should be beach")
|
|
world (transform-world
|
|
(make-world 3 3)
|
|
(list (compile-rule "if x is 2 then altitude should be 11")
|
|
(compile-rule "if x is less than 2 then altitude should be 0")))]
|
|
(is (= (:state (apply afn (list {:x 1 :y 1} world))) :beach)
|
|
"Rule fires when condition is met (strip of altitude 11 down right hand side)")
|
|
(is (nil? (apply afn (list {:x 2 :y 1} world)))
|
|
"Middle cell of the strip has only two high neighbours, so rule should not fire.")))
|
|
|
|
(testing "More than number neighbours have property equal to symbolic-value"
|
|
(let [afn (compile-rule "if more than 2 neighbours have state equal to grassland then state should be beach")
|
|
world (transform-world
|
|
(make-world 3 3)
|
|
(list (compile-rule "if x is 2 then altitude should be 11 and state should be grassland")
|
|
(compile-rule "if x is less than 2 then altitude should be 0 and state should be water")))]
|
|
(is (= (:state (apply afn (list {:x 1 :y 1} world))) :beach)
|
|
"Rule fires when condition is met (strip of altitude 11 down right hand side)")
|
|
(is (nil? (apply afn (list {:x 2 :y 1} world)))
|
|
"Middle cell of the strip has only two high neighbours, so rule should not fire."))
|
|
(let [afn (compile-rule "if more than 2 neighbours are grassland then state should be beach")
|
|
;; 'are grassland' should mean the same as 'have state equal to grassland'.
|
|
world (transform-world
|
|
(make-world 3 3)
|
|
(list (compile-rule "if x is 2 then altitude should be 11 and state should be grassland")
|
|
(compile-rule "if x is less than 2 then altitude should be 0 and state should be water")))]
|
|
(is (= (:state (apply afn (list {:x 1 :y 1} world))) :beach)
|
|
"Rule fires when condition is met (strip of altitude 11 down right hand side)")
|
|
(is (nil? (apply afn (list {:x 2 :y 1} world)))
|
|
"Middle cell of the strip has only two high neighbours, so rule should not fire."))
|
|
)
|
|
|
|
(testing "Fewer than number neighbours have property equal to numeric-value"
|
|
(let [afn (compile-rule "if fewer than 3 neighbours have altitude equal to 11 then state should be beach")
|
|
world (transform-world
|
|
(make-world 3 3)
|
|
(list (compile-rule "if x is 2 then altitude should be 11")
|
|
(compile-rule "if x is less than 2 then altitude should be 0")))]
|
|
(is (= (:state (apply afn (list {:x 2 :y 1} world))) :beach)
|
|
"Rule fires when condition is met (Middle cell of the strip has only two high neighbours)")
|
|
(is (nil? (apply afn (list {:x 1 :y 1} world)))
|
|
"Middle cell of world has three high neighbours, so rule should not fire.")))
|
|
|
|
(testing "Fewer than number neighbours have property equal to symbolic-value"
|
|
(let [afn (compile-rule "if fewer than 3 neighbours have state equal to grassland then state should be beach")
|
|
world (transform-world
|
|
(make-world 3 3)
|
|
(list (compile-rule "if x is 2 then altitude should be 11 and state should be grassland")
|
|
(compile-rule "if x is less than 2 then altitude should be 0 and state should be water")))]
|
|
(is (= (:state (apply afn (list {:x 2 :y 1} world))) :beach)
|
|
"Rule fires when condition is met (Middle cell of the strip has only two high neighbours)")
|
|
(is (nil? (apply afn (list {:x 1 :y 1} world)))
|
|
"Middle cell of world has three high neighbours, so rule should not fire.")))
|
|
|
|
;; some neighbours have property equal to value
|
|
(testing "Some neighbours have property equal to numeric-value"
|
|
(let [afn (compile-rule "if some neighbours have altitude equal to 11 then state should be beach")
|
|
world (transform-world
|
|
(make-world 3 3)
|
|
(list (compile-rule "if x is 2 then altitude should be 11")
|
|
(compile-rule "if x is less than 2 then altitude should be 0")))]
|
|
(is (= (:state (apply afn (list {:x 1 :y 1} world))) :beach)
|
|
"Rule fires when condition is met (strip of altitude 11 down right hand side)")
|
|
(is (nil? (apply afn (list {:x 0 :y 1} world)))
|
|
"Left hand side of world has no high neighbours, so rule should not fire.")))
|
|
|
|
(testing "Some neighbours have property equal to symbolic-value"
|
|
(let [afn (compile-rule "if some neighbours have state equal to grassland then state should be beach")
|
|
world (transform-world
|
|
(make-world 3 3)
|
|
(list (compile-rule "if x is 2 then altitude should be 11 and state should be grassland")
|
|
(compile-rule "if x is less than 2 then altitude should be 0 and state should be water")))]
|
|
(is (= (:state (apply afn (list {:x 1 :y 1} world))) :beach)
|
|
"Rule fires when condition is met (strip of altitude 11 down right hand side)")
|
|
(is (nil? (apply afn (list {:x 0 :y 1} world)))
|
|
"Left hand side of world has no high neighbours, so rule should not fire.")))
|
|
|
|
;; more than number neighbours have property more than numeric-value
|
|
(testing "More than number neighbours have property more than symbolic-value"
|
|
(let [afn (compile-rule "if more than 2 neighbours have altitude more than 10 then state should be beach")
|
|
world (transform-world
|
|
(make-world 3 3)
|
|
(list (compile-rule "if x is 2 then altitude should be 11 and state should be grassland")
|
|
(compile-rule "if x is less than 2 then altitude should be 0 and state should be water")))]
|
|
(is (= (:state (apply afn (list {:x 1 :y 1} world))) :beach)
|
|
"Rule fires when condition is met (strip of altitude 11 down right hand side)")
|
|
(is (nil? (apply afn (list {:x 2 :y 1} world)))
|
|
"Middle cell of the strip has only two high neighbours, so rule should not fire.")))
|
|
|
|
;; fewer than number neighbours have property more than numeric-value
|
|
(testing "Fewer than number neighbours have property more than numeric-value"
|
|
(let [afn (compile-rule "if fewer than 3 neighbours have altitude more than 10 then state should be beach")
|
|
world (transform-world
|
|
(make-world 3 3)
|
|
(list (compile-rule "if x is 2 then altitude should be 11")
|
|
(compile-rule "if x is less than 2 then altitude should be 0")))]
|
|
(is (= (:state (apply afn (list {:x 2 :y 1} world))) :beach)
|
|
"Rule fires when condition is met (Middle cell of the strip has only two high neighbours)")
|
|
(is (nil? (apply afn (list {:x 1 :y 1} world)))
|
|
"Middle cell of world has three high neighbours, so rule should not fire.")))
|
|
|
|
;; some neighbours have property more than numeric-value
|
|
(testing "Some neighbours have property more than numeric-value"
|
|
(let [afn (compile-rule "if some neighbours have altitude more than 10 then state should be beach")
|
|
world (transform-world
|
|
(make-world 3 3)
|
|
(list (compile-rule "if x is 2 then altitude should be 11")
|
|
(compile-rule "if x is less than 2 then altitude should be 0")))]
|
|
(is (= (:state (apply afn (list {:x 1 :y 1} world))) :beach)
|
|
"Rule fires when condition is met (strip of altitude 11 down right hand side)")
|
|
(is (nil? (apply afn (list {:x 0 :y 1} world)))
|
|
"Left hand side of world has no high neighbours, so rule should not fire.")))
|
|
|
|
;; more than number neighbours have property less than numeric-value
|
|
(testing "More than number neighbours have property less than numeric-value"
|
|
(let [afn (compile-rule "if more than 4 neighbours have altitude less than 10 then state should be beach")
|
|
world (transform-world
|
|
(make-world 3 3)
|
|
(list (compile-rule "if x is 2 then altitude should be 11")
|
|
(compile-rule "if x is less than 2 then altitude should be 0")))]
|
|
(is (= (:state (apply afn (list {:x 1 :y 1} world))) :beach)
|
|
"Rule fires when condition is met (strip of altitude 11 down right hand side)")
|
|
(is (nil? (apply afn (list {:x 2 :y 1} world)))
|
|
"Middle cell of the strip has only three low neighbours, so rule should not fire.")))
|
|
|
|
;; fewer than number neighbours have property less than numeric-value
|
|
(testing "Fewer than number neighbours have property less than numeric-value"
|
|
(let [afn (compile-rule "if fewer than 4 neighbours have altitude less than 10 then state should be beach")
|
|
world (transform-world
|
|
(make-world 3 3)
|
|
(list (compile-rule "if x is 2 then altitude should be 11")
|
|
(compile-rule "if x is less than 2 then altitude should be 0")))]
|
|
(is (nil? (apply afn (list {:x 1 :y 1} world)))
|
|
"Centre cell has five low neighbours, so rule should not fire")
|
|
(is (= (:state (apply afn (list {:x 2 :y 1} world))) :beach)
|
|
"Middle cell of the strip has only three low neighbours, so rule should fire.")))
|
|
|
|
;; some neighbours have property less than numeric-value
|
|
(testing "Some number neighbours have property less than numeric-value"
|
|
(let [afn (compile-rule "if some neighbours have altitude less than 10 then state should be beach")
|
|
world (transform-world
|
|
(make-world 3 3)
|
|
(list (compile-rule "if x is less than 2 then altitude should be 11")
|
|
(compile-rule "if x is 2 then altitude should be 0")))]
|
|
(is (= (:state (apply afn (list {:x 1 :y 1} world))) :beach)
|
|
"Rule fires when condition is met (strip of altitude 0 down right hand side)")
|
|
(is (nil? (apply afn (list {:x 0 :y 1} world)))
|
|
"Left of world is all high, so rule should not fire.")))
|
|
|
|
|
|
;; 'single action' already tested in 'condition' tests above
|
|
;; action and actions
|
|
(testing "Conjunction of actions"
|
|
(let [afn (compile-rule "if state is new then state should be grassland and fertility should be 0")]
|
|
(is (= (apply afn (list {:state :new} nil))
|
|
{:state :grassland :fertility 0})
|
|
"Both actions are executed")))
|
|
|
|
;; 'property should be symbolic-value' and 'property should be numeric-value'
|
|
;; already tested in tests above
|
|
|
|
;; number chance in number property should be value
|
|
(testing "Syntax of probability rule - action of real probability very hard to test"
|
|
(let [afn (compile-rule "if state is forest then 5 chance in 5 state should be climax")]
|
|
(is (= (:state (apply afn (list {:state :forest} nil))) :climax)
|
|
"five chance in five should fire every time"))
|
|
(let [afn (compile-rule "if state is forest then 0 chance in 5 state should be climax")]
|
|
(is (nil? (apply afn (list {:state :forest} nil)))
|
|
"zero chance in five should never fire")))
|
|
|
|
;; property operator numeric-value
|
|
(testing "Arithmetic action: addition of number"
|
|
(let [afn (compile-rule "if state is climax then fertility should be fertility + 1")]
|
|
(is (= (:fertility
|
|
(apply afn (list {:state :climax :fertility 0} nil)))
|
|
1)
|
|
"Addition is executed")))
|
|
|
|
(testing "Arithmetic action: addition of property value"
|
|
(let [afn (compile-rule "if state is climax then fertility should be fertility + leaf-fall")]
|
|
(is (= (:fertility
|
|
(apply afn
|
|
(list {:state :climax
|
|
:fertility 0
|
|
:leaf-fall 1} nil)))
|
|
1)
|
|
"Addition is executed")))
|
|
|
|
(testing "Arithmetic action: subtraction of number"
|
|
(let [afn (compile-rule "if state is crop then fertility should be fertility - 1")]
|
|
(is (= (:fertility
|
|
(apply afn (list {:state :crop :fertility 2} nil)))
|
|
1)
|
|
"Action is executed")))
|
|
|
|
(testing "Arithmetic action: subtraction of property value"
|
|
(let [afn (compile-rule "if wolves are more than 0 then deer should be deer - wolves")]
|
|
(is (= (:deer
|
|
(apply afn
|
|
(list {:deer 3
|
|
:wolves 2} nil)))
|
|
1)
|
|
"Action is executed")))
|
|
|
|
(testing "Arithmetic action: multiplication by number"
|
|
(let [afn (compile-rule "if deer are more than 1 then deer should be deer * 2")]
|
|
(is (= (:deer
|
|
(apply afn (list {:deer 2} nil)))
|
|
4)
|
|
"Action is executed")))
|
|
|
|
(testing "Arithmetic action: multiplication by property value"
|
|
(let [afn (compile-rule "if state is crop then deer should be deer * deer")]
|
|
(is (= (:deer
|
|
(apply afn
|
|
(list {:state :crop :deer 2} nil)))
|
|
4)
|
|
"Action is executed")))
|
|
|
|
(testing "Arithmetic action: division by number"
|
|
(let [afn (compile-rule "if wolves are more than 0 then deer should be deer / 2")]
|
|
(is (= (:deer
|
|
(apply afn (list {:deer 2 :wolves 1} nil)))
|
|
1)
|
|
"Action is executed")))
|
|
|
|
(testing "Arithmetic action: division by property value"
|
|
(let [afn (compile-rule "if wolves are more than 0 then deer should be deer / wolves")]
|
|
(is (= (:deer
|
|
(apply afn
|
|
(list {:deer 2 :wolves 2} nil)))
|
|
1)
|
|
"Action is executed")))
|
|
|
|
;; simple within distance
|
|
(testing "Number neighbours within distance have property equal to value"
|
|
(let [afn (compile-rule "if 8 neighbours within 2 have state equal to new then state should be water")
|
|
world (make-world 5 5)]
|
|
(is (= (apply afn (list {:x 0 :y 0} world))
|
|
{:state :water :x 0 :y 0})
|
|
"Rule fires when condition is met (in a new world all cells are new, corner cell has eight neighbours within two)")
|
|
(is (nil? (apply afn (list {:x 1 :y 1} world)))
|
|
"Middle cell has twenty-four neighbours within two, so rule does not fire.")))
|
|
|
|
;; comparator within distance
|
|
(testing "More than number neighbours within distance have property equal to symbolic-value"
|
|
(let [afn (compile-rule "if more than 7 neighbours within 2 have state equal to grassland and more than 7 neighbours within 2 have state equal to water then state should be beach")
|
|
;; 5x5 world, strip of high ground two cells wide down left hand side
|
|
;; xxooo
|
|
;; xxooo
|
|
;; xxooo
|
|
;; xxooo
|
|
;; xxooo
|
|
world (transform-world
|
|
(make-world 5 5)
|
|
(list (compile-rule "if x is less than 2 then altitude should be 11 and state should be grassland")
|
|
(compile-rule "if x is more than 1 then altitude should be 0 and state should be water")))]
|
|
(is (= (:state (apply afn (list {:x 2 :y 2} world))) :beach)
|
|
"Rule fires when condition is met (strip of altitude 11 down right hand side)")
|
|
(is (nil? (apply afn (list {:x 0 :y 1} world)))
|
|
"Middle cell of the strip has only two high neighbours, so rule should not fire."))))
|