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(require-macros :fennel-test)
(require-macros (doto :cljlib require))
(local (meta? fennel) (pcall require :fennel))
(fn meta [x]
(fennel.metadata:get x))
(deftest test-let-variants
(testing "when-let"
(assert-eq (when-let [a 4] a) 4)
(assert-not (when-let [a false] a) "(not (when-let [a false] a))")
(assert-not (when-let [a nil] a) "(not (when-let [a nil] a))"))
(testing "when-some"
(assert-eq (when-some [a [1 2 3]] a) [1 2 3])
(assert-eq (when-some [a false] a) false)
(assert-not (when-some [a nil] a) "(when-some [a nil] a)"))
(testing "if-let"
(assert-eq (if-let [a 4] a 10) 4)
(assert-eq (if-let [a false] a 10) 10)
(assert-eq (if-let [a nil] a 10) 10))
(testing "if-some"
(assert-eq (if-some [a [1 2 3]] a :nothing) [1 2 3])
(assert-eq (if-some [a false] a :nothing) false)
(assert-eq (if-some [a nil] a :nothing) :nothing)))
(deftest test-multimethods
(testing "defmulti"
(defmulti x (fn [x] x))
(assert-eq (defmulti x (fn [x] (+ x 1))) nil))
(testing "defmulti defalut"
(defmulti fac (fn [x] x))
(defmethod fac 0 [_] 1)
(defmethod fac :default [x] (* x (fac (- x 1))))
(assert-eq (fac 4) 24))
(testing "defmulti keys"
(defmulti send-data (fn [protocol data] protocol))
(defmethod send-data :http [protocol data] (.. data " will be sent over HTTP"))
(defmethod send-data :icap [protocol data] (.. data " will be sent over ICAP"))
(assert-eq (send-data :http 42) "42 will be sent over HTTP")
(assert-eq (send-data :icap 42) "42 will be sent over ICAP")
(defmulti send-message (fn [message] (. message :protocol)))
(defmethod send-message :http [message] (.. "sending " (. message :message) " over HTTP"))
(defmethod send-message :icap [message] (.. "sending " (. message :message) " over ICAP"))
(assert-eq (send-message {:protocol :http :message "ваыв"})
"sending ваыв over HTTP")
(assert-eq (send-message {:protocol :icap :message 42})
"sending 42 over ICAP"))
(testing "defmulti with dispatch on tables"
(defmulti encounter (fn [x y] [(. x :species) (. y :species)]))
(defmethod encounter [:bunny :lion] [_ _] :run)
(defmethod encounter [:lion :bunny] [_ _] :eat)
(defmethod encounter [:lion :lion] [_ _] :fight)
(defmethod encounter [:bunny :bunny] [_ _] :mate)
(let [l {:species :lion}
b {:species :bunny}]
(assert-eq (encounter b b) :mate)
(assert-eq (encounter l l) :fight)
(assert-eq (encounter b l) :run)
(assert-eq (encounter l b) :eat)))
(testing "defmulti default name"
(defmulti f (fn [x] x) :default :my-default)
(defmethod f :my-default [_] 42)
(assert-eq (f 10) 42))
(testing "defmulti with multiple arity"
(defmulti f (fn* ([x] x) ([x y] [x y])))
(defmethod f :default ([_] :def) ([_ _] :def2))
(defmethod f :4 ([x] (.. x :2)))
(defmethod f [:4 :2] ([x y] 42))
(assert-eq (f 0) :def)
(assert-eq (f 0 1) :def2)
(assert-eq (f :4) :42)
(assert-eq (f :4 :2) 42)))
(deftest test-try
(testing "try"
(assert-eq (try (+ 1 2 3)) 6)
(assert-eq (try (+ 1 2 3) (catch _ 0) (finally 10)) 6)
(assert-eq (try (+ 1 2 3 nil) (catch _ 0) (finally 10)) 0)
(assert-eq (try (+ 1 2 3 nil) (catch _) (finally 10)) nil))
(testing "catch-all"
(assert-eq (try
(error "10")
(catch _ :pass))
:pass)
(assert-eq (try
(error [10])
(catch err err))
[10]))
(testing "finally"
(let [tbl []]
(try
(try
(finally (table.insert tbl 1)))
(try
(error 10)
(catch _ (table.insert tbl 2))
(finally (table.insert tbl 3)))
(try
(error 20)
(finally (table.insert tbl 4)))
(catch _ (table.insert tbl 5))
(catch 20 (table.insert tbl 6))
(finally (table.insert tbl 7)))
(assert-eq tbl [1 2 3 4 5 7])))
(testing "runtime error"
(assert-eq 0 (try
(/ 1 nil)
(catch _ 0))))
(testing "multi-value results"
(assert-eq 3 (select :# (try (values 1 2 3))))
(assert-eq [1 2 3] [(try (values 1 2 3))])
(assert-eq 6 (select :# (try (values 1 nil 3 nil nil nil))))
(assert-eq 6 (select :# (try (error 10) (catch _ (values 1 nil 3 nil nil nil)))))))
(deftest test-loop
(testing "loop macro"
(assert-eq
(loop [[first & rest] [1 2 3 4 5]
acc 0]
(if (= nil first)
acc
(recur rest (+ acc first))))
15)
(assert-eq
(loop [a 2
b (+ a 3)]
(if (= b 5)
(recur a (+ 1 b))
b))
6)))
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