## ~subsetpark/ec

ref: bd73813f66ec440d293ebe5a8f1e3237343c5ab0 ec/test/calc.janet -rw-r--r-- 3.8 KiB
bd73813f — Zach Smith Introduce vectors and .[] syntax 11 months ago
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141```
```(import /src/calc)

(import /src/operations :prefix "o/")

(use testament)
(use /test-support)

(deftest vectors
(def v (wrap 1 2 3))
(def v2 (wrap 2 5 10))

(vec= [4 5 6] (calc/apply-operation o/add v (:new calc/Int 3)))
(vec= [3 7 13] (calc/apply-operation o/add v v2))

(vec= [-2 -1 0] (calc/apply-operation o/sub v (:new calc/Int 3)))
(vec= [2 1 0] (calc/apply-operation o/sub (:new calc/Int 3) v))

(is (vec= 6 (calc/apply-operation o/add (:new calc/Int 3) (:new calc/Int 3)))))

(deftest matrices
(is (thrown? (wrap (wrap 1) (wrap 1 2)))
"Inner quotations are of differing sizes")

(def m (wrap (wrap 1 2 3)
(wrap 4 5 6)))
(is (= [2 3] (calc/get-shape m)))

(def filled (calc/fill m [2 2 3]))
(is (= [2 2 3] (calc/get-shape filled)))

(vec= @[@[@[1 2 3]
@[4 5 6]]
@[@[1 2 3]
@[4 5 6]]]
filled)

(is (thrown? (calc/fill m [2 3 3]))
"Vectors can be filled into shapes that share a suffix")

(vec= @[@[@[2 4 6]
@[8 10 12]]
@[@[2 4 6]
@[8 10 12]]]

(def s (:new calc/Stack))
# Initial value
(calc/push s (:new calc/Int 0))
# Operands
(calc/push s (wrap 1 2 3))
# Operator
(calc/push s a/distribute)
(pop-and-compare 6 s))

(deftest distribute-multiple-operations
(def s (:new calc/Stack))
(calc/push s (:new calc/Int 0))
(calc/push s (wrap 1 2 3))
(calc/push s (quote-wrap 3 o/mul o/add))
(calc/push s a/distribute)
(pop-and-compare 18 s))

(deftest apply-quotation
(def s (:new calc/Stack))
(calc/push s (quote-wrap 1 2 3))
(calc/push s a/apply-quotation)
(pop-and-compare 3 s)
(pop-and-compare 2 s)
(pop-and-compare 1 s)
(is (empty? (s :data))))

(deftest apply-vector
(def s (:new calc/Stack))
(calc/push s (wrap 1 2 3))
(calc/push s a/apply-quotation)
(pop-and-compare 3 s)
(pop-and-compare 2 s)
(pop-and-compare 1 s)
(is (empty? (s :data))))

(deftest apply-operation
(def s (:new calc/Stack))
(calc/push s (:new calc/Int 3))
(calc/push s (:new calc/Int 5))
(calc/push s a/apply-quotation)
(pop-and-compare 8 s)
(is (empty? (s :data))))

(deftest wrap-stack
(def s (:new calc/Stack))
(calc/push s (:new calc/Int 3))
(calc/push s (:new calc/Int 4))
(calc/push s a/wrap-stack)

(def vec (calc/pop s))
(is (= [2] (calc/shape vec)))
(is (empty? (s :data))))

(deftest wrap-quotations
(def s (:new calc/Stack))
(calc/push s (wrap 1 2))
(calc/push s (wrap 2 4))
(calc/push s a/wrap-stack)

(def vec (calc/pop s))
(is (= [2 2] (calc/shape vec)))
(is (empty? (s :data))))

(deftest wrap-failure
(def s (:new calc/Stack))
(calc/push s (wrap 1))
(calc/push s (wrap 2 4))
(is (thrown?
(calc/push s a/wrap-stack))
"Wrapping a stack requires homogeneous data"))

(deftest get-arity
(is (= 2 (calc/get-arity (quote-wrap o/add)))
"A quoted operation's arity is the operation's arity")
```
A composition of operations' arity is the greatest of the
individual operations' arities, each adjusted for the out-arity
of the one prior
```)