74 lines
3.2 KiB
Text
74 lines
3.2 KiB
Text
# Phase 5: Multimethods + Hierarchy Tests
|
|
(use ../src/jolt/api)
|
|
(defn ct-eval [ctx s] (eval-string ctx s))
|
|
|
|
# 22. Hierarchy
|
|
(print "22: hierarchy...")
|
|
(let [ctx (init)]
|
|
(assert (= true (ct-eval ctx "(map? (make-hierarchy))")) "make-hierarchy returns map")
|
|
# 2-arity derive/isa? just returns nil/false (no global hierarchy)
|
|
(ct-eval ctx "(derive ::square ::shape)")
|
|
(assert (= false (ct-eval ctx "(isa? ::square ::shape)")) "isa? 2-arity always false"))
|
|
(print " passed")
|
|
|
|
# 23. Multimethods — basic dispatch
|
|
(print "23: basic multimethod dispatch...")
|
|
(let [ctx (init)]
|
|
(ct-eval ctx "(defmulti greet (fn [x] (:lang x)))")
|
|
(ct-eval ctx "(defmethod greet :en [_] \"hello\")")
|
|
(ct-eval ctx "(defmethod greet :fr [_] \"bonjour\")")
|
|
(assert (= "hello" (ct-eval ctx "(greet {:lang :en})")) "dispatch :en")
|
|
(assert (= "bonjour" (ct-eval ctx "(greet {:lang :fr})")) "dispatch :fr")
|
|
(assert (ct-eval ctx "(try (greet {:lang :es}) (catch Exception e true))") "missing dispatch errors"))
|
|
(print " passed")
|
|
|
|
# 24. Multimethods — :default dispatch
|
|
(print "24: :default dispatch...")
|
|
(let [ctx (init)]
|
|
(ct-eval ctx "(defmulti classify :type :default :unknown)")
|
|
(ct-eval ctx "(defmethod classify :a [_] :alpha)")
|
|
# :default :unknown renames the catch-all dispatch key; a method must be
|
|
# registered under it (Clojure semantics).
|
|
(ct-eval ctx "(defmethod classify :unknown [_] :unknown)")
|
|
(assert (= :alpha (ct-eval ctx "(classify {:type :a})")) "known dispatch")
|
|
(assert (= :unknown (ct-eval ctx "(classify {:type :z})")) "default fallback"))
|
|
(print " passed")
|
|
|
|
# 25. Multimethods — hierarchy dispatch
|
|
(print "25: hierarchy dispatch...")
|
|
(let [ctx (init)]
|
|
(ct-eval ctx "(def h (make-hierarchy))")
|
|
(ct-eval ctx "(def h (derive h ::dog ::mammal))")
|
|
(ct-eval ctx "(def h (derive h ::mammal ::animal))")
|
|
(ct-eval ctx "(defmulti animal-sound (fn [x] x) :default :unknown :hierarchy h)")
|
|
(ct-eval ctx "(defmethod animal-sound ::animal [_] \"rawr\")")
|
|
(ct-eval ctx "(defmethod animal-sound ::dog [_] \"woof\")")
|
|
# catch-all method registered under the renamed default key :unknown
|
|
(ct-eval ctx "(defmethod animal-sound :unknown [_] :unknown)")
|
|
(assert (= "woof" (ct-eval ctx "(animal-sound ::dog)")) "direct dispatch")
|
|
(assert (= "rawr" (ct-eval ctx "(animal-sound ::mammal)")) "hierarchy fallback")
|
|
(assert (= :unknown (ct-eval ctx "(animal-sound ::rock)")) "default fallback"))
|
|
(print " passed")
|
|
|
|
# 26. remove-method
|
|
(print "26: remove-method...")
|
|
(let [ctx (init)]
|
|
(ct-eval ctx "(defmulti rmtest :k)")
|
|
(ct-eval ctx "(defmethod rmtest :a [_] 1)")
|
|
(ct-eval ctx "(defmethod rmtest :b [_] 2)")
|
|
(assert (= 1 (ct-eval ctx "(rmtest {:k :a})")) "before remove")
|
|
(ct-eval ctx "(remove-method (var rmtest) :a)")
|
|
(assert (ct-eval ctx "(try (rmtest {:k :a}) (catch Exception e true))") "removed method errors"))
|
|
(print " passed")
|
|
|
|
# 27. remove-all-methods
|
|
(print "27: remove-all-methods...")
|
|
(let [ctx (init)]
|
|
(ct-eval ctx "(defmulti alltest :k)")
|
|
(ct-eval ctx "(defmethod alltest :a [_] 1)")
|
|
(ct-eval ctx "(defmethod alltest :b [_] 2)")
|
|
(ct-eval ctx "(remove-all-methods (var alltest))")
|
|
(assert (ct-eval ctx "(try (alltest {:k :a}) (catch Exception e true))") "all methods removed errors"))
|
|
(print " passed")
|
|
|
|
(print "\nAll Phase 5 tests passed!")
|