hy/tests/native_tests/core.hy

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;; Copyright 2018 the authors.
;; This file is part of Hy, which is free software licensed under the Expat
;; license. See the LICENSE.
(import [hy._compat [PY3]])
;;;; some simple helpers
(defn assert-true [x]
(assert (= True x)))
(defn assert-false [x]
(assert (= False x)))
(defn assert-equal [x y]
(assert (= x y)))
(defn assert-none [x]
(assert (is x None)))
(defn assert-requires-num [f]
(for [x ["foo" [] None]]
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(try (f x)
(except [TypeError] True)
(else (assert False)))))
(defn test-coll? []
"NATIVE: testing coll?"
(assert-true (coll? [1 2 3]))
(assert-true (coll? {"a" 1 "b" 2}))
(assert-true (coll? (range 10)))
(assert-false (coll? "abc"))
(assert-false (coll? 1)))
(defn test-butlast []
"NATIVE: testing butlast function"
(assert-equal (list (butlast (range 10)))
[0 1 2 3 4 5 6 7 8])
(assert-equal (list (butlast [1]))
[])
(assert-equal (list (butlast []))
[])
; with an infinite sequence
(import itertools)
(assert-equal (list (take 5 (butlast (itertools.count 10))))
[10 11 12 13 14]))
(defn test-cycle []
"NATIVE: testing cycle"
(assert-equal (list (cycle [])) [])
(assert-equal (list (take 7 (cycle [1 2 3]))) [1 2 3 1 2 3 1])
(assert-equal (list (take 2 (cycle [1 2 3]))) [1 2])
(assert-equal (list (take 4 (cycle [1 None 3]))) [1 None 3 1]))
(defn test-dec []
"NATIVE: testing the dec function"
(assert-equal 0 (dec 1))
(assert-equal -1 (dec 0))
(assert-equal 0 (dec (dec 2)))
(assert-requires-num dec))
(defn test-setv []
"NATIVE: testing setv mutation"
(setv x 1)
(setv y 1)
(assert-equal x y)
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(setv y 12)
(setv x y)
(assert-equal x 12)
(assert-equal y 12)
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(setv y (fn [x] 9))
(setv x y)
(assert-equal (x y) 9)
(assert-equal (y x) 9)
(try (do (setv a.b 1) (assert False))
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(except [e [NameError]] (assert (in "name 'a' is not defined" (str e)))))
(try (do (setv b.a (fn [x] x)) (assert False))
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(except [e [NameError]] (assert (in "name 'b' is not defined" (str e)))))
(import itertools)
(setv foopermutations (fn [x] (itertools.permutations x)))
(setv p (set [(, 1 3 2) (, 3 2 1) (, 2 1 3) (, 3 1 2) (, 1 2 3) (, 2 3 1)]))
(assert-equal (set (itertools.permutations [1 2 3])) p)
(assert-equal (set (foopermutations [3 1 2])) p)
(setv permutations- itertools.permutations)
(setv itertools.permutations (fn [x] 9))
(assert-equal (itertools.permutations p) 9)
(assert-equal (foopermutations foopermutations) 9)
(setv itertools.permutations permutations-)
(assert-equal (set (itertools.permutations [2 1 3])) p)
(assert-equal (set (foopermutations [2 3 1])) p))
(defn test-distinct []
"NATIVE: testing the distinct function"
(setv res (list (distinct [ 1 2 3 4 3 5 2 ])))
(assert-equal res [1 2 3 4 5])
;; distinct of an empty list should be []
(setv res (list (distinct [])))
(assert-equal res [])
;; now with an iter
(setv test_iter (iter [1 2 3 4 3 5 2]))
(setv res (list (distinct test_iter)))
(assert-equal res [1 2 3 4 5])
; make sure we can handle None in the list
(setv res (list (distinct [1 2 3 2 5 None 3 4 None])))
(assert-equal res [1 2 3 5 None 4]))
(defn test-drop []
"NATIVE: testing drop function"
(setv res (list (drop 2 [1 2 3 4 5])))
(assert-equal res [3 4 5])
(setv res (list (drop 3 (iter [1 2 3 4 5]))))
(assert-equal res [4 5])
(setv res (list (drop 3 (iter [1 2 3 None 4 5]))))
(assert-equal res [None 4 5])
(setv res (list (drop 0 [1 2 3 4 5])))
(assert-equal res [1 2 3 4 5])
(try (do (list (drop -1 [1 2 3 4 5])) (assert False))
(except [e [ValueError]] None))
(setv res (list (drop 6 (iter [1 2 3 4 5]))))
(assert-equal res [])
(setv res (list (take 5 (drop 2 (iterate inc 0)))))
(assert-equal res [2 3 4 5 6]))
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(defn test-drop-last []
"NATIVE: testing drop-last function"
(assert-equal (list (drop-last 5 (range 10 20)))
[10 11 12 13 14])
(assert-equal (list (drop-last 0 (range 5)))
[0 1 2 3 4])
(assert-equal (list (drop-last 100 (range 100)))
[])
; with an infinite sequence
(import itertools)
(assert-equal (list (take 5 (drop-last 100 (itertools.count 10))))
[10 11 12 13 14]))
(defn test-drop-while []
"NATIVE: testing drop-while function"
(setv res (list (drop-while even? [2 4 7 8 9])))
(assert (= res [7 8 9]))
(setv res (list (drop-while pos? [2 4 7 8 9])))
(assert (= res []))
(setv res (list (drop-while numeric? [1 2 3 None "a"])))
(assert (= res [None "a"])))
(defn test-empty? []
"NATIVE: testing the empty? function"
(assert-true (empty? ""))
(assert-false (empty? "None"))
(assert-true (empty? (,)))
(assert-false (empty? (, None)))
(assert-true (empty? []))
(assert-false (empty? [None]))
(assert-true (empty? {}))
(assert-false (empty? {"a" None}))
(assert-true (empty? (set)))
(assert-false (empty? (set [None]))))
(defn test-even []
"NATIVE: testing the even? function"
(assert-true (even? -2))
(assert-false (even? 1))
(assert-true (even? 0))
(assert-requires-num even?))
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(defn test-every? []
"NATIVE: testing the every? function"
(assert-true (every? even? [2 4 6]))
(assert-false (every? even? [1 3 5]))
(assert-false (every? even? [2 4 5]))
(assert-true (every? even? [])))
(setv globalvar 1)
(defn test-exec []
(setv localvar 1)
(setv code "
result['localvar in locals'] = 'localvar' in locals()
result['localvar in globals'] = 'localvar' in globals()
result['globalvar in locals'] = 'globalvar' in locals()
result['globalvar in globals'] = 'globalvar' in globals()
result['x in locals'] = 'x' in locals()
result['x in globals'] = 'x' in globals()
result['y in locals'] = 'y' in locals()
result['y in globals'] = 'y' in globals()")
(setv result {})
(exec code)
(assert-true (get result "localvar in locals"))
(assert-false (get result "localvar in globals"))
(assert-false (get result "globalvar in locals"))
(assert-true (get result "globalvar in globals"))
(assert-false (or
(get result "x in locals") (get result "x in globals")
(get result "y in locals") (get result "y in globals")))
(setv result {})
(exec code {"x" 1 "result" result})
(assert-false (or
(get result "localvar in locals") (get result "localvar in globals")
(get result "globalvar in locals") (get result "globalvar in globals")))
(assert-true (and
(get result "x in locals") (get result "x in globals")))
(assert-false (or
(get result "y in locals") (get result "y in globals")))
(setv result {})
(exec code {"x" 1 "result" result} {"y" 1})
(assert-false (or
(get result "localvar in locals") (get result "localvar in globals")
(get result "globalvar in locals") (get result "globalvar in globals")))
(assert-false (get result "x in locals"))
(assert-true (get result "x in globals"))
(assert-true (get result "y in locals"))
(assert-false (get result "y in globals")))
(defn test-filter []
"NATIVE: testing the filter function"
(setv res (list (filter pos? [ 1 2 3 -4 5])))
(assert-equal res [ 1 2 3 5 ])
;; test with iter
(setv res (list (filter pos? (iter [ 1 2 3 -4 5 -6]))))
(assert-equal res [ 1 2 3 5])
(setv res (list (filter neg? [ -1 -4 5 3 4])))
(assert-false (= res [1 2]))
;; test with empty list
(setv res (list (filter neg? [])))
(assert-equal res [])
;; test with None in the list
(setv res (list (filter even? (filter numeric? [1 2 None 3 4 None 4 6]))))
(assert-equal res [2 4 4 6])
(setv res (list (filter none? [1 2 None 3 4 None 4 6])))
(assert-equal res [None None]))
(defn test-flatten []
"NATIVE: testing the flatten function"
(setv res (flatten [1 2 [3 4] 5]))
(assert-equal res [1 2 3 4 5])
(setv res (flatten ["foo" (, 1 2) [1 [2 3] 4] "bar"]))
(assert-equal res ["foo" 1 2 1 2 3 4 "bar"])
(setv res (flatten [1]))
(assert-equal res [1])
(setv res (flatten []))
(assert-equal res [])
(setv res (flatten (, 1)))
(assert-equal res [1])
;; test with None
(setv res (flatten (, 1 (, None 3))))
(assert-equal res [1 None 3])
(try (flatten "foo")
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(except [e [TypeError]] (assert (in "not a collection" (str e)))))
(try (flatten 12.34)
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(except [e [TypeError]] (assert (in "not a collection" (str e))))))
(defn test-float? []
"NATIVE: testing the float? function"
(assert-true (float? 4.2))
(assert-false (float? 0))
(assert-false (float? -3))
(assert-true (float? -3.2))
(assert-false (float? "foo")))
(defn test-symbol? []
"NATIVE: testing the symbol? function"
(assert-false (symbol? "hello"))
(assert-false (symbol? [1 2 3]))
(assert-false (symbol? '[a b c]))
(assert-true (symbol? 'im-symbol))
(assert-false (symbol? (name 'im-symbol))))
(defn test-gensym []
"NATIVE: testing the gensym function"
(import [hy.models [HySymbol]])
(setv s1 (gensym))
(assert (isinstance s1 HySymbol))
(assert (= 0 (.find s1 "_;G|")))
(setv s2 (gensym "xx"))
(setv s3 (gensym "xx"))
(assert (= 0 (.find s2 "_;xx|")))
(assert (not (= s2 s3)))
(assert (not (= (str s2) (str s3)))))
(defn test-identity []
"NATIVE: testing the identity function"
(assert (= 4 (identity 4)))
(assert (= "hy" (identity "hy")))
(assert (= [1 2] (identity [1 2]))))
(defn test-inc []
"NATIVE: testing the inc function"
(assert-equal 3 (inc 2))
(assert-equal 0 (inc -1))
(assert-requires-num inc)
(defclass X [object]
[__add__ (fn [self other] (.format "__add__ got {}" other))])
(assert-equal (inc (X)) "__add__ got 1"))
(defn test-instance []
"NATIVE: testing instance? function"
(defclass Foo [object])
(defclass Foo2 [object])
(defclass Foo3 [Foo])
(setv foo (Foo))
(setv foo3 (Foo3))
(assert-true (instance? Foo foo))
(assert-false (instance? Foo2 foo))
(assert-true (instance? Foo foo3))
(assert-true (instance? float 1.0))
(assert-true (instance? int (int 3)))
(assert-true (instance? str (str "hello"))))
(defn test-integer? []
"NATIVE: testing the integer? function"
(assert-true (integer? 0))
(assert-true (integer? 3))
(assert-true (integer? -3))
(assert-true (integer? (integer "-3")))
(assert-true (integer? (integer 3)))
(assert-false (integer? 4.2))
(assert-false (integer? None))
(assert-false (integer? "foo")))
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(defn test-integer-char? []
"NATIVE: testing the integer-char? function"
(assert-true (integer-char? "1"))
(assert-true (integer-char? "-1"))
(assert-true (integer-char? (str (integer 300))))
(assert-false (integer-char? "foo"))
(assert-false (integer-char? None)))
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(defn test-interleave []
"NATIVE: testing the interleave function"
;; with more than 2 sequences
(assert-equal (list (take 9 (interleave (range 10)
(range 10 20)
(range 20 30))))
[0 10 20 1 11 21 2 12 22])
;; with sequences of different length
(assert-equal (list (interleave (range 1000000)
(range 0 -3 -1)))
[0 0 1 -1 2 -2])
;; with infinite sequences
(import itertools)
(assert-equal (list (take 10 (interleave (itertools.count)
(itertools.count 100))))
[0 100 1 101 2 102 3 103 4 104]))
(defn test-interpose []
"NATIVE: testing the interpose function"
;; with a list
(assert-equal (list (interpose "!" ["a" "b" "c"]))
["a" "!" "b" "!" "c"])
;; with an infinite sequence
(import itertools)
(assert-equal (list (take 7 (interpose -1 (itertools.count))))
[0 -1 1 -1 2 -1 3]))
(defn test-iterable []
"NATIVE: testing iterable? function"
;; should work for a string
(setv s (str "abcde"))
(assert-true (iterable? s))
;; should work for unicode
(setv u "hello")
(assert-true (iterable? u))
(assert-true (iterable? (iter u)))
;; should work for a list
(setv l [1 2 3 4])
(assert-true (iterable? l))
(assert-true (iterable? (iter l)))
;; should work for a dict
(setv d {:a 1 :b 2 :c 3})
(assert-true (iterable? d))
;; should work for a tuple?
(setv t (, 1 2 3 4))
(assert-true (iterable? t))
;; should work for a generator
(assert-true (iterable? (repeat 3)))
;; shouldn't work for an int
(assert-false (iterable? 5)))
(defn test-iterate []
"NATIVE: testing the iterate function"
(setv res (list (take 5 (iterate inc 5))))
(assert-equal res [5 6 7 8 9])
(setv res (list (take 3 (iterate (fn [x] (* x x)) 5))))
(assert-equal res [5 25 625])
(setv f (take 4 (iterate inc 5)))
(assert-equal (list f) [5 6 7 8]))
(defn test-iterator []
"NATIVE: testing iterator? function"
;; should not work for a list
(setv l [1 2 3 4])
(assert-false (iterator? l))
;; should work for an iter over a list
(setv i (iter [1 2 3 4]))
(assert-true (iterator? i))
;; should not work for a dict
(setv d {:a 1 :b 2 :c 3})
(assert-false (iterator? d))
;; should not work for a tuple?
(setv t (, 1 2 3 4))
(assert-false (iterator? t))
;; should work for a generator
(assert-true (iterator? (repeat 3)))
;; should not work for an int
(assert-false (iterator? 5)))
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(defn test-last []
"NATIVE: testing the last function"
(assert-equal (last [1 2 3 4]) 4)
(assert-equal (last [5]) 5))
(import itertools)
(assert-equal (last (take 5 (itertools.count 10))) 14)
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(defn test-neg []
"NATIVE: testing the neg? function"
(assert-true (neg? -2))
(assert-false (neg? 1))
(assert-false (neg? 0))
(when PY3
(assert-requires-num neg?)))
(defn test-zero []
"NATIVE: testing the zero? function"
(assert-false (zero? -2))
(assert-false (zero? 1))
(assert-true (zero? 0)))
(defn test-none []
"NATIVE: testing for `is None`"
(assert-true (none? None))
(setv f None)
(assert-true (none? f))
(assert-false (none? 0))
(assert-false (none? "")))
(defn test-nth []
"NATIVE: testing the nth function"
(assert-equal 2 (nth [1 2 4 7] 1))
(assert-equal 7 (nth [1 2 4 7] 3))
(assert-none (nth [1 2 4 7] 5))
(assert-equal (nth [1 2 4 7] 5 "some default value")
"some default value") ; with default specified
(try (do (nth [1 2 4 7] -1) (assert False))
(except [e [ValueError]] None))
;; now for iterators
(assert-equal 2 (nth (iter [1 2 4 7]) 1))
(assert-equal 7 (nth (iter [1 2 4 7]) 3))
(assert-none (nth (iter [1 2 4 7]) 5))
(assert-equal (nth (iter [1 2 4 7]) 5 "some default value")
"some default value") ; with default specified
(try (do (nth (iter [1 2 4 7]) -1) (assert False))
(except [e [ValueError]] None))
(assert-equal 5 (nth (take 3 (drop 2 [1 2 3 4 5 6])) 2)))
(defn test-numeric? []
"NATIVE: testing the numeric? function"
(assert-true (numeric? 1))
(assert-true (numeric? 3.4))
(assert-true (numeric? 0.0))
(assert-true (numeric? -1.45))
(assert-false (numeric? "Foo"))
(assert-false (numeric? None)))
(defn test-odd []
"NATIVE: testing the odd? function"
(assert-true (odd? -3))
(assert-true (odd? 1))
(assert-false (odd? 0))
(assert-requires-num odd?))
(defn test-partition []
"NATIVE: testing the partition function"
(setv ten (range 10))
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;; no remainder
(assert-equal (list (partition ten 3))
[(, 0 1 2) (, 3 4 5) (, 6 7 8)])
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;; pair by default
(assert-equal (list (partition ten))
[(, 0 1) (, 2 3) (, 4 5) (, 6 7) (, 8 9)])
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;; length 1 is valid
(assert-equal (list (partition ten 1))
[(, 0) (, 1) (, 2) (, 3) (, 4) (, 5) (, 6) (, 7) (, 8) (, 9)])
;; length 0 returns an empty sequence
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(assert-equal (list (partition ten 0)) [])
;; negative length raises ValueError
(try (do (partition ten -1) (assert False))
(except [ValueError]))
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;; keep remainder with a fillvalue
(assert-equal (list (partition ten 3 :fillvalue "x"))
[(, 0 1 2) (, 3 4 5) (, 6 7 8) (, 9 "x" "x")])
;; skip elements with step > n
(assert-equal (list (partition ten 2 3))
[(, 0 1) (, 3 4) (, 6 7)])
;; overlap with step < n
(assert-equal (list (partition (range 5) 2 1))
[(, 0 1) (, 1 2) (, 2 3) (, 3 4)])
;; tee the input as necessary
;; https://github.com/hylang/hy/issues/1237
(assert-equal (list (take 4 (partition (cycle [1 2 3]) 3)))
[(, 1 2 3) (, 1 2 3) (, 1 2 3) (, 1 2 3)])
(assert-equal (list (partition (iter (range 10))))
[(, 0 1) (, 2 3) (, 4 5) (, 6 7) (, 8 9)]))
(defn test-pos []
"NATIVE: testing the pos? function"
(assert-true (pos? 2))
(assert-false (pos? -1))
(assert-false (pos? 0))
(when PY3
(assert-requires-num pos?)))
(defn test-remove []
"NATIVE: testing the remove function"
(setv r (list (remove odd? [1 2 3 4 5 6 7])))
(assert-equal r [2 4 6])
(assert-equal (list (remove even? [1 2 3 4 5])) [1 3 5])
(assert-equal (list (remove neg? [1 2 3 4 5])) [1 2 3 4 5])
(assert-equal (list (remove pos? [1 2 3 4 5])) [])
;; deal with embedded None
(assert-equal (list (remove (fn [x] (not (numeric? x))) [1 2 None 3 None 4])) [1 2 3 4]))
(defn test-repeat []
"NATIVE: testing repeat"
(setv r (repeat 10))
(assert-equal (list (take 5 r)) [10 10 10 10 10])
(assert-equal (list (take 4 r)) [10 10 10 10])
(setv r (repeat 10 3))
(assert-equal (list r) [10 10 10]))
(defn test-repeatedly []
"NATIVE: testing repeatedly"
(setv r (repeatedly (fn [] (inc 4))))
(assert-equal (list (take 5 r)) [5 5 5 5 5])
(assert-equal (list (take 4 r)) [5 5 5 5])
(assert-equal (list (take 6 r)) [5 5 5 5 5 5]))
(defn test-second []
"NATIVE: testing second"
(assert-equal 2 (second [1 2]))
(assert-equal 3 (second [2 3 4])))
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(defn test-some []
"NATIVE: testing the some function"
(assert-true (some even? [2 4 6]))
(assert-none (some even? [1 3 5]))
(assert-true (some even? [1 2 3]))
(assert-none (some even? []))
; 0, "" (empty string) and [] (empty list) are all logical false
(assert-none (some identity [0 "" []]))
; non-empty string is logical true
(assert-equal (some identity [0 "this string is non-empty" []])
"this string is non-empty")
; None if collection is empty
(assert-none (some even? [])))
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(defn test-string? []
"NATIVE: testing string?"
(assert-true (string? "foo"))
(assert-true (string? ""))
(assert-false (string? 5.3))
(assert-true (string? (str 5.3)))
(assert-false (string? None)))
(defn test-take []
"NATIVE: testing the take function"
(setv res (list (take 3 [1 2 3 4 5])))
(assert-equal res [1 2 3])
(setv res (list (take 4 (repeat "s"))))
(assert-equal res ["s" "s" "s" "s"])
(setv res (list (take 0 (repeat "s"))))
(assert-equal res [])
(try (do (list (take -1 (repeat "s"))) (assert False))
(except [e [ValueError]] None))
(setv res (list (take 6 [1 2 None 4])))
(assert-equal res [1 2 None 4]))
(defn test-take-nth []
"NATIVE: testing the take-nth function"
(setv res (list (take-nth 2 [1 2 3 4 5 6 7])))
(assert-equal res [1 3 5 7])
(setv res (list (take-nth 3 [1 2 3 4 5 6 7])))
(assert-equal res [1 4 7])
(setv res (list (take-nth 4 [1 2 3 4 5 6 7])))
(assert-equal res [1 5])
(setv res (list (take-nth 5 [1 2 3 4 5 6 7])))
(assert-equal res [1 6])
(setv res (list (take-nth 6 [1 2 3 4 5 6 7])))
(assert-equal res [1 7])
(setv res (list (take-nth 7 [1 2 3 4 5 6 7])))
(assert-equal res [1])
;; what if there are None's in list
(setv res (list (take-nth 2 [1 2 3 None 5 6])))
(assert-equal res [1 3 5])
(setv res (list (take-nth 3 [1 2 3 None 5 6])))
(assert-equal res [1 None])
;; using 0 should raise ValueError
(setv passed False)
(try
(setv res (list (take-nth 0 [1 2 3 4 5 6 7])))
(except [ValueError] (setv passed True)))
(assert passed))
(defn test-take-while []
"NATIVE: testing the take-while function"
(setv res (list (take-while pos? [ 1 2 3 -4 5])))
(assert-equal res [1 2 3])
(setv res (list (take-while neg? [ -1 -4 5 3 4])))
(assert-false (= res [1 2]))
(setv res (list (take-while none? [None None 1 2 3])))
(assert-equal res [None None])
(setv res (list (take-while (fn [x] (not (none? x))) [1 2 3 4 None 5 6 None 7])))
(assert-equal res [1 2 3 4]))
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(defn test-doto []
"NATIVE: testing doto macro"
(setv collection [])
(doto collection (.append 1) (.append 2) (.append 3))
(assert-equal collection [1 2 3])
(setv res (doto (set) (.add 2) (.add 1)))
(assert-equal res (set [1 2]))
(setv res (doto [] (.append 1) (.append 2) .reverse))
(assert-equal res [2 1]))
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(defn test-is-keyword []
"NATIVE: testing the keyword? function"
(assert (keyword? ':bar))
(assert (keyword? ':baz))
(assert (keyword? :bar))
(assert (keyword? :baz))
(assert (not (keyword? "foo")))
(assert (not (keyword? ":foo")))
(assert (not (keyword? 1)))
(assert (not (keyword? None))))
(defn test-import-init-hy []
"NATIVE: testing import of __init__.hy"
(import tests.resources.bin)
(assert (in "_null_fn_for_import_test" (dir tests.resources.bin))))
(defn test-accumulate []
"NATIVE: testing the accumulate function"
(assert-equal (list (accumulate ["a" "b" "c"]))
["a" "ab" "abc"])
(assert-equal (list (accumulate [1 2 3 4 5]))
[1 3 6 10 15])
(assert-equal (list (accumulate [1 -2 -3 -4 -5] -))
[1 3 6 10 15]))
(defn test-complement []
"NATIVE: test complement"
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(setv helper (complement identity))
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(assert-true (helper False))
(assert-false (helper True)))
(defn test-constantly []
"NATIVE: test constantly"
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(setv helper (constantly 42))
(assert-true (= (helper) 42))
(assert-true (= (helper 1 2 3) 42))
(assert-true (= (helper 1 2 :foo 3) 42)))
(defn test-comp []
"NATIVE: test comp"
(assert-true ((comp odd? inc second) [1 2 3 4 5]))
(assert-true (= 1 ((comp first) [1 2 3])))
(assert-true ((comp even? inc +) 1 2 3 4 5))
(assert-true (= 5 ((comp) 5)))
(assert (is (comp) identity)))
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(defn test-juxt []
"NATIVE: test juxt"
(assert-equal ((juxt min max sum) [1 2 3 4 5 6])
[1 6 21])
(assert-equal ((juxt identity) 42)
[42]))
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(defn test-comment []
(assert-none (comment <h1>This is merely a comment.</h1>
<p> Move along. (Nothing to see here.)</p>)))
(defn test-doc [capsys]
(doc doc)
(setv out_err (.readouterr capsys))
(assert (.startswith (.strip (first out_err))
"Help on function (doc) in module hy.core.macros:"))
(assert (empty? (second out_err))))