hy/tests/native_tests/language.hy

(import [tests.resources [kwtest function-with-a-dash]]
        [os.path [exists isdir isfile]]
        [sys :as systest]
        [operator [or_]]
        [hy.errors [HyTypeError]])
(import sys)

(import [hy._compat [PY33 PY34 PY35]])

(defn test-sys-argv []
  "NATIVE: test sys.argv"
  ;; BTW, this also tests inline comments. Which suck to implement.
  (assert (isinstance sys.argv list)))


(defn test-hex []
  "NATIVE: test hex"
  (assert (= 0x80 128)))


(defn test-octal []
  "NATIVE: test octal"
  (assert (= 0o1232 666)))


(defn test-binary []
  "NATIVE: test binary"
  (assert (= 0b1011101 93)))


(defn test-fractions []
  "NATIVE: test fractions"
  (assert (= 1/2 (fraction 1 2))))


(defn test-lists []
  "NATIVE: test lists work right"
  (assert (= [1 2 3 4] (+ [1 2] [3 4]))))


(defn test-dicts []
  "NATIVE: test dicts work right"
  (assert (= {1 2 3 4} {3 4 1 2}))
  (assert (= {1 2 3 4} {1 (+ 1 1) 3 (+ 2 2)})))


(defn test-sets []
  "NATIVE: test sets work right"
  (assert (= #{1 2 3 4} (| #{1 2} #{3 4})))
  (assert (= #{} (set))))


(defn test-setv-empty []
  "NATIVE: test setv works with no arguments"
  (assert (is (setv) nil)))


(defn test-setv-get []
  "NATIVE: test setv works on a get expression"
  (setv foo [0 1 2])
  (setv (get foo 0) 12)
  (assert (= (get foo 0) 12)))


(defn test-setv-builtin []
  "NATIVE: test that setv doesn't work on builtins"
  (try (eval '(setv False 1))
       (except [e [TypeError]] (assert (in "Can't assign to a builtin" (str e)))))
  (try (eval '(setv True 0))
       (except [e [TypeError]] (assert (in "Can't assign to a builtin" (str e)))))
  (try (eval '(setv None 1))
       (except [e [TypeError]] (assert (in "Can't assign to a builtin" (str e)))))
  (try (eval '(setv false 1))
       (except [e [TypeError]] (assert (in "Can't assign to a builtin" (str e)))))
  (try (eval '(setv true 0))
       (except [e [TypeError]] (assert (in "Can't assign to a builtin" (str e)))))
  (try (eval '(setv nil 1))
       (except [e [TypeError]] (assert (in "Can't assign to a builtin" (str e)))))
  (try (eval '(defn defclass [] (print "hello")))
       (except [e [TypeError]] (assert (in "Can't assign to a builtin" (str e)))))
  (try (eval '(defn get [] (print "hello")))
       (except [e [TypeError]] (assert (in "Can't assign to a builtin" (str e)))))
  (try (eval '(defn lambda [] (print "hello")))
       (except [e [TypeError]] (assert (in "Can't assign to a builtin" (str e))))))


(defn test-setv-pairs []
  "NATIVE: test that setv works on pairs of arguments"
  (assert (= (setv a 1 b 2) (, 1 2)))
  (assert (= a 1))
  (assert (= b 2))
  (setv y 0 x 1 y x)
  (assert y)
  (try (eval '(setv a 1 b))
       (except [e [TypeError]] (assert (in "`setv' needs an even number of arguments" (str e))))))


(defn test-store-errors []
  "NATIVE: test that setv raises the correct errors when given wrong argument types"
  (try
    (do
      (eval '(setv (do 1 2) 1))
      (assert false))
    (except [e HyTypeError]
      (assert (= e.message "Can't assign or delete a non-expression"))))

  (try
    (do
      (eval '(setv 1 1))
      (assert false))
    (except [e HyTypeError]
      (assert (= e.message "Can't assign or delete a HyInteger"))))

  (try
    (do
      (eval '(setv {1 2} 1))
      (assert false))
    (except [e HyTypeError]
      (assert (= e.message "Can't assign or delete a HyDict"))))

  (try
    (do
      (eval '(del 1 1))
      (assert false))
    (except [e HyTypeError]
      (assert (= e.message "Can't assign or delete a HyInteger")))))


(defn test-fn-corner-cases []
  "NATIVE: tests that fn/defn handles corner cases gracefully"
  (try (eval '(fn "foo"))
       (except [e [Exception]] (assert (in "to `fn' must be a list"
                                          (str e)))))
  (try (eval '(defn foo "foo"))
       (except [e [Exception]]
         (assert (in "takes a parameter list as second" (str e))))))


(defn test-alias-names-in-errors []
  "NATIVE: tests that native aliases show the correct names in errors"
  (try (eval '(lambda))
       (except [e [Exception]] (assert (in "lambda" (str e)))))
  (try (eval '(fn))
       (except [e [Exception]] (assert (in "fn" (str e)))))
  (try (eval '(setv 1 2 3))
       (except [e [Exception]] (assert (in "setv" (str e)))))
  (try (eval '(def 1 2 3))
       (except [e [Exception]] (assert (in "def" (str e))))))


(defn test-for-loop []
  "NATIVE: test for loops"
  (setv count1 0 count2 0)
  (for [x [1 2 3 4 5]]
    (setv count1 (+ count1 x))
    (setv count2 (+ count2 x)))
  (assert (= count1 15))
  (assert (= count2 15))
  (setv count 0)
  (for [x [1 2 3 4 5]
        y [1 2 3 4 5]]
    (setv count (+ count x y))
    (else
      (+= count 1)))
  (assert (= count 151))
  (assert (= (list ((fn [] (for [x [[1] [2 3]] y x] (yield y)))))
             (list-comp y [x [[1] [2 3]] y x])))
  (assert (= (list ((fn [] (for [x [[1] [2 3]] y x z (range 5)] (yield z)))))
             (list-comp z [x [[1] [2 3]] y x z (range 5)]))))


(defn test-nasty-for-nesting []
  "NATIVE: test nesting for loops harder"
  ;; This test and feature is dedicated to @nedbat.

  ;; let's ensure empty iterating is an implicit do
  (setv t 0)
  (for [] (setv t 1))
  (assert (= t 1))

  ;; OK. This first test will ensure that the else is hooked up to the
  ;; for when we break out of it.
  (for [x (range 2)
        y (range 2)]
      (break)
    (else (raise Exception)))

  ;; OK. This next test will ensure that the else is hooked up to the
  ;; "inner" iteration
  (for [x (range 2)
        y (range 2)]
    (if (= y 1) (break))
    (else (raise Exception)))

  ;; OK. This next test will ensure that the else is hooked up to the
  ;; "outer" iteration
  (for [x (range 2)
        y (range 2)]
    (if (= x 1) (break))
    (else (raise Exception)))

  ;; OK. This next test will ensure that we call the else branch exactly
  ;; once.
  (setv flag 0)
  (for [x (range 2)
        y (range 2)]
    (+ 1 1)
    (else (setv flag (+ flag 2))))
  (assert (= flag 2)))


(defn test-while-loop []
  "NATIVE: test while loops?"
  (setv count 5)
  (setv fact 1)
  (while (> count 0)
    (setv fact (* fact count))
    (setv count (- count 1)))
  (assert (= count 0))
  (assert (= fact 120)))


(defn test-not []
  "NATIVE: test not"
  (assert (not (= 1 2)))
  (assert (= true (not false)))
  (assert (= false (not 42))) )


(defn test-inv []
  "NATIVE: test inv"
  (assert (= (~ 1) -2))
  (assert (= (~ -2) 1)))


(defn test-in []
  "NATIVE: test in"
  (assert (in "a" ["a" "b" "c" "d"]))
  (assert (not-in "f" ["a" "b" "c" "d"])))


(defn test-noteq []
  "NATIVE: not eq"
  (assert (!= 2 3))
  (assert (not (!= 1))))


(defn test-eq []
  "NATIVE: eq"
  (assert (= 1 1))
  (assert (= 1)))


(defn test-numops []
  "NATIVE: test numpos"
  (assert (> 5 4 3 2 1))
  (assert (> 1))
  (assert (< 1 2 3 4 5))
  (assert (< 1))
  (assert (<= 5 5 5 5 ))
  (assert (<= 1))
  (assert (>= 5 5 5 5 ))
  (assert (>= 1)))


(defn test-is []
  "NATIVE: test is can deal with None"
  (setv a nil)
  (assert (is a nil))
  (assert (is-not a "b"))
  (assert (none? a)))


(defn test-branching []
  "NATIVE: test if branching"
  (if true
    (assert (= 1 1))
    (assert (= 2 1))))


(defn test-branching-with-do []
  "NATIVE: test if branching (multiline)"
  (if false
    (assert (= 2 1))
    (do
     (assert (= 1 1))
     (assert (= 1 1))
     (assert (= 1 1)))))

(defn test-branching-expr-count-with-do []
  "NATIVE: make sure we execute the right number of expressions in the branch"
  (setv counter 0)
  (if false
    (assert (= 2 1))
    (do
     (setv counter (+ counter 1))
     (setv counter (+ counter 1))
     (setv counter (+ counter 1))))
  (assert (= counter 3)))


(defn test-cond []
  "NATIVE: test if cond sorta works."
  (cond
   [(= 1 2) (assert (is true false))]
   [(is None None) (setv x true) (assert x)])
  (assert (= (cond) nil)))


(defn test-if []
  "NATIVE: test if if works."
  ;; with an odd number of args, the last argument is the default case
  (assert (= 1 (if 1)))
  (assert (= 1 (if 0 -1
                     1)))
  ;; with an even number of args, the default is nil
  (assert (is nil (if)))
  (assert (is nil (if 0 1)))
  ;; test deeper nesting
  (assert (= 42
             (if 0 0
                 nil 1
                 "" 2
                 1 42
                 1 43)))
  ;; test shortcutting
  (setv x nil)
  (if 0 (setv x 0)
      "" (setv x "")
      42 (setv x 42)
      43 (setv x 43)
         (setv x "default"))
  (assert (= x 42)))


(defn test-index []
  "NATIVE: Test that dict access works"
  (assert (= (get {"one" "two"} "one") "two"))
  (assert (= (get [1 2 3 4 5] 1) 2))
  (assert (= (get {"first" {"second" {"third" "level"}}}
                  "first" "second" "third")
             "level"))
  (assert (= (get ((fn [] {"first" {"second" {"third" "level"}}}))
                  "first" "second" "third")
             "level"))
  (assert (= (get {"first" {"second" {"third" "level"}}}
                  ((fn [] "first")) "second" "third")
             "level")))


(defn test-lambda []
  "NATIVE: test lambda operator"
  (setv square (lambda [x] (* x x)))
  (assert (= 4 (square 2)))
  (setv lambda_list (lambda [test &rest args] (, test args)))
  (assert (= (, 1 (, 2 3)) (lambda_list 1 2 3))))


(defn test-imported-bits []
  "NATIVE: test the imports work"
  (assert (is (exists ".") true))
  (assert (is (isdir ".") true))
  (assert (is (isfile ".") false)))


(defn test-kwargs []
  "NATIVE: test kwargs things."
  (assert (= (apply kwtest [] {"one" "two"}) {"one" "two"}))
  (setv mydict {"one" "three"})
  (assert (= (apply kwtest [] mydict) mydict))
  (assert (= (apply kwtest [] ((fn [] {"one" "two"}))) {"one" "two"})))


(defn test-apply []
  "NATIVE: test working with args and functions"
  (defn sumit [a b c] (+ a b c))
  (assert (= (apply sumit [1] {"b" 2 "c" 3}) 6))
  (assert (= (apply sumit [1 2 2]) 5))
  (assert (= (apply sumit [] {"a" 1 "b" 1 "c" 2}) 4))
  (assert (= (apply sumit ((fn [] [1 1])) {"c" 1}) 3))
  (defn noargs [] [1 2 3])
  (assert (= (apply noargs) [1 2 3]))
  (defn sumit-mangle [an-a a-b a-c a-d] (+ an-a a-b a-c a-d))
  (def Z "a_d")
  (assert (= (apply sumit-mangle [] {"an-a" 1 :a-b 2 'a-c 3 Z 4}) 10)))


(defn test-apply-with-methods []
  "NATIVE: test apply to call a method"
  (setv str "foo {bar}")
  (assert (= (apply .format [str] {"bar" "baz"})
             (apply .format ["foo {0}" "baz"])
             "foo baz"))
  (setv lst ["a {0} {1} {foo} {bar}" "b" "c"])
  (assert (= (apply .format lst {"foo" "d" "bar" "e"})
             "a b c d e")))


(defn test-dotted []
  "NATIVE: test dotted invocation"
  (assert (= (.join " " ["one" "two"]) "one two")))


(defn test-do []
  "NATIVE: test do"
  (do))

(defn test-bare-try [] (try
    (try (raise ValueError))
  (except [ValueError])
  (else (assert false))))


(defn test-exceptions []
  "NATIVE: test Exceptions"

  (try)

  (try (do))

  (try (do))

  (try (do) (except))

  (try (do) (except [IOError]) (except))

  ;; Test correct (raise)
  (let [passed false]
    (try
     (try
      (raise IndexError)
      (except [IndexError] (raise)))
     (except [IndexError]
       (setv passed true)))
    (assert passed))

  ;; Test incorrect (raise)
  (let [passed false]
    (try
     (raise)
     ;; Python 2 raises TypeError
     ;; Python 3 raises RuntimeError
     (except [[TypeError RuntimeError]]
       (setv passed true)))
    (assert passed))

  ;; Test (finally)
  (let [passed false]
    (try
     (do)
     (finally (setv passed true)))
    (assert passed))

  ;; Test (finally) + (raise)
  (let [passed false]
    (try
     (raise Exception)
     (except)
     (finally (setv passed true)))
    (assert passed))


  ;; Test (finally) + (raise) + (else)
  (let [passed false
        not-elsed true]
    (try
     (raise Exception)
     (except)
     (else (setv not-elsed false))
     (finally (setv passed true)))
    (assert passed)
    (assert not-elsed))

  (try
   (raise (KeyError))
   (except [[IOError]] (assert false))
   (except [e [KeyError]] (assert e)))

  (try
   (raise (KeyError))
   (except [[IOError]] (assert false))
   (except [e [KeyError]] (assert e)))

  (try
   (get [1] 3)
   (except [IndexError] (assert true))
   (except [IndexError] (do)))

  (try
   (print foobar42ofthebaz)
   (except [IndexError] (assert false))
   (except [NameError] (do)))

  (try
   (get [1] 3)
   (except [e IndexError] (assert (isinstance e IndexError))))

  (try
   (get [1] 3)
   (except [e [IndexError NameError]] (assert (isinstance e IndexError))))

  (try
   (print foobar42ofthebaz)
   (except [e [IndexError NameError]] (assert (isinstance e NameError))))

  (try
   (print foobar42)
   (except [[IndexError NameError]] (do)))

  (try
   (get [1] 3)
   (except [[IndexError NameError]] (do)))

  (try
   (print foobar42ofthebaz)
   (except))

  (try
   (print foobar42ofthebaz)
   (except []))

  (try
   (print foobar42ofthebaz)
   (except [] (do)))

  (try
   (print foobar42ofthebaz)
   (except []
     (setv foobar42ofthebaz 42)
     (assert (= foobar42ofthebaz 42))))

  (let [passed false]
    (try
     (try (do) (except) (else (bla)))
     (except [NameError] (setv passed true)))
    (assert passed))

  (let [x 0]
    (try
     (raise IOError)
     (except [IOError]
       (setv x 45))
     (else (setv x 44)))
    (assert (= x 45)))

  (let [x 0]
    (try
     (raise KeyError)
     (except []
       (setv x 45))
     (else (setv x 44)))
    (assert (= x 45)))

  (let [x 0]
    (try
     (try
      (raise KeyError)
      (except [IOError]
        (setv x 45))
      (else (setv x 44)))
     (except))
    (assert (= x 0))))

(defn test-earmuffs []
  "NATIVE: Test earmuffs"
  (setv *foo* "2")
  (setv foo "3")
  (assert (= *foo* FOO))
  (assert (!= *foo* foo)))


(defn test-threading []
  "NATIVE: test threading macro"
  (assert (= (-> (.upper "a b c d") (.replace "A" "X") (.split))
             ["X" "B" "C" "D"])))


(defn test-tail-threading []
  "NATIVE: test tail threading macro"
  (assert (= (.join ", " (* 10 ["foo"]))
             (->> ["foo"] (* 10) (.join ", ")))))


(defn test-threading-two []
  "NATIVE: test threading macro"
  (assert (= (-> "a b c d" .upper (.replace "A" "X") .split)
             ["X" "B" "C" "D"])))


(defn test-assoc []
  "NATIVE: test assoc"
  (setv vals {"one" "two"})
  (assoc vals "two" "three")
  (assert (= (get vals "two") "three")))

(defn test-multiassoc []
  "NATIVE: test assoc multiple values"
  (setv vals {"one" "two"})
  (assoc vals "two" "three" "four" "five")
  (assert (and (= (get vals "two") "three") (= (get vals "four") "five") (= (get vals "one") "two"))))

(defn test-pass []
  "NATIVE: Test pass worksish"
  (if true (do) (do))
  (assert (= 1 1)))


(defn test-yield []
  "NATIVE: test yielding"
  (defn gen [] (for [x [1 2 3 4]] (yield x)))
  (setv ret 0)
  (for [y (gen)] (setv ret (+ ret y)))
  (assert (= ret 10)))

(defn test-yield-with-return []
  "NATIVE: test yield with return"
  (defn gen [] (yield 3) "goodbye")
  (if PY33
    (do (setv gg (gen))
        (assert (= 3 (next gg)))
        (try (next gg)
             (except [e StopIteration] (assert (hasattr e "value"))
                                       (assert (= (getattr e "value") "goodbye")))))
    (do (setv gg (gen))
        (assert (= 3 (next gg)))
        (try (next gg)
             (except [e StopIteration] (assert (not (hasattr e "value"))))))))


(defn test-yield-in-try []
  "NATIVE: test yield in try"
  (defn gen []
    (let [x 1]
    (try (yield x)
         (finally (print x)))))
  (setv output (list (gen)))
  (assert (= [1] output)))


(defn test-first []
  "NATIVE: test firsty things"
  (assert (= (first [1 2 3 4 5]) 1))
  (assert (is (first []) nil))
  (assert (= (car [1 2 3 4 5]) 1)))


(defn test-cut []
  "NATIVE: test cut"
  (assert (= (cut [1 2 3 4 5] 1) [2 3 4 5]))
  (assert (= (cut [1 2 3 4 5] 1 3) [2 3]))
  (assert (= (cut [1 2 3 4 5]) [1 2 3 4 5])))


(defn test-take []
  "NATIVE: test take"
  (assert (= (take 0 [2 3]) []))
  (assert (= (take 1 [2 3]) [2]))
  (assert (= (take 2 [2 3]) [2 3])))


(defn test-drop []
  "NATIVE: test drop"
  (assert (= (list (drop 0 [2 3])) [2 3]))
  (assert (= (list (drop 1 [2 3])) [3]))
  (assert (= (list (drop 2 [2 3])) [])))


(defn test-rest []
  "NATIVE: test rest"
  (assert (= (list (rest [1 2 3 4 5])) [2 3 4 5])))


(defn test-importas []
  "NATIVE: test import as"
  (assert (!= (len systest.path) 0)))


(defn test-context []
  "NATIVE: test with"
  (with [fd (open "README.md" "r")] (assert fd))
  (with [(open "README.md" "r")] (do)))


(defn test-with-return []
  "NATIVE: test that with returns stuff"
  (defn read-file [filename]
    (with [fd (open filename "r")] (.read fd)))
  (assert (!= 0 (len (read-file "README.md")))))


(defn test-for-doodle []
  "NATIVE: test for-do"
  (do (do (do (do (do (do (do (do (do (setv (, x y) (, 0 0)))))))))))
  (for [- [1 2]]
    (do
     (setv x (+ x 1))
     (setv y (+ y 1))))
  (assert (= y x 2)))


(defn test-for-else []
  "NATIVE: test for else"
  (let [x 0]
    (for* [a [1 2]]
      (setv x (+ x a))
      (else (setv x (+ x 50))))
    (assert (= x 53)))

  (let [x 0]
    (for* [a [1 2]]
      (setv x (+ x a))
      (else))
    (assert (= x 3))))


(defn test-list-comprehensions []
  "NATIVE: test list comprehensions"
  (assert (= (list-comp (* x 2) (x (range 2))) [0 2]))
  (assert (= (list-comp (* x 2) (x (range 4)) (% x 2)) [2 6]))
  (assert (= (sorted (list-comp (* y 2) ((, x y) (.items {"1" 1 "2" 2}))))
             [2 4]))
  (assert (= (list-comp (, x y) (x (range 2) y (range 2)))
             [(, 0 0) (, 0 1) (, 1 0) (, 1 1)]))
  (assert (= (list-comp j (j [1 2])) [1 2])))


(defn test-set-comprehensions []
  "NATIVE: test set comprehensions"
  (assert (instance? set (set-comp x [x (range 2)])))
  (assert (= (set-comp (* x 2) (x (range 2))) (set [0 2])))
  (assert (= (set-comp (* x 2) (x (range 4)) (% x 2)) (set [2 6])))
  (assert (= (set-comp (* y 2) ((, x y) (.items {"1" 1 "2" 2})))
             (set [2 4])))
  (assert (= (set-comp (, x y) (x (range 2) y (range 2)))
             (set [(, 0 0) (, 0 1) (, 1 0) (, 1 1)])))
  (assert (= (set-comp j (j [1 2])) (set [1 2]))))


(defn test-dict-comprehensions []
  "NATIVE: test dict comprehensions"
  (assert (instance? dict (dict-comp x x [x (range 2)])))
  (assert (= (dict-comp x (* x 2) (x (range 2))) {1 2 0 0}))
  (assert (= (dict-comp x (* x 2) (x (range 4)) (% x 2)) {3 6 1 2}))
  (assert (= (dict-comp x (* y 2) ((, x y) (.items {"1" 1 "2" 2})))
             {"2" 4 "1" 2}))
  (assert (= (dict-comp (, x y) (+ x y) (x (range 2) y (range 2)))
             {(, 0 0) 0 (, 1 0) 1 (, 0 1) 1 (, 1 1) 2})))


(defn test-generator-expressions []
  "NATIVE: test generator expressions"
  (assert (not (instance? list (genexpr x [x (range 2)]))))
  (assert (= (list (genexpr (* x 2) (x (range 2)))) [0 2]))
  (assert (= (list (genexpr (* x 2) (x (range 4)) (% x 2))) [2 6]))
  (assert (= (list (sorted (genexpr (* y 2) ((, x y) (.items {"1" 1 "2" 2})))))
             [2 4]))
  (assert (= (list (genexpr (, x y) (x (range 2) y (range 2))))
             [(, 0 0) (, 0 1) (, 1 0) (, 1 1)]))
  (assert (= (list (genexpr j (j [1 2]))) [1 2])))


(defn test-defn-order []
  "NATIVE: test defn evaluation order"
  (setv acc [])
  (defn my-fun []
    (.append acc "Foo")
    (.append acc "Bar")
    (.append acc "Baz"))
  (my-fun)
  (assert (= acc ["Foo" "Bar" "Baz"])))


(defn test-defn-return []
  "NATIVE: test defn return"
  (defn my-fun [x]
    (+ x 1))
  (assert (= 43 (my-fun 42))))


(defn test-defn-lambdakey []
  "NATIVE: test defn with a &symbol function name"
  (defn &hy [] 1)
  (assert (= (&hy) 1)))


(defn test-defn-do []
  "NATIVE: test defn evaluation order with do"
  (setv acc [])
  (defn my-fun []
    (do
     (.append acc "Foo")
     (.append acc "Bar")
     (.append acc "Baz")))
  (my-fun)
  (assert (= acc ["Foo" "Bar" "Baz"])))


(defn test-defn-do-return []
  "NATIVE: test defn return with do"
  (defn my-fun [x]
    (do
     (+ x 42)  ; noop
     (+ x 1)))
  (assert (= 43 (my-fun 42))))


(defn test-mangles []
  "NATIVE: test mangles"
  (assert (= 2 ((fn [] (+ 1 1))))))


(defn test-fn-return []
  "NATIVE: test function return"
  (setv fn-test ((fn [] (fn [] (+ 1 1)))))
  (assert (= (fn-test) 2))
  (setv fn-test (fn []))
  (assert (= (fn-test) None)))


(defn test-let []
  "NATIVE: test let works rightish"
  ;; TODO: test sad paths for let
  (assert (= (let [x 1 y 2 z 3] (+ x y z)) 6))
  (assert (= (let [x 1 a nil y 2 b nil] (if a 1 2)) 2))
  (assert (= (let [x nil] x) nil))
  (assert (= (let [x "x not bound"] (setv x "x bound by setv") x)
             "x bound by setv"))
  (assert (= (let [x "let nests scope correctly"]
               (let [y nil] x))
             "let nests scope correctly"))
  (assert (= (let [x 999999]
               (let [x "x being rebound"] x))
             "x being rebound"))
  (assert (= (let [x "x not being rebound"]
               (let [x 2] nil)
               x)
             "x not being rebound"))
  (assert (= (let [x (set [3 2 1 3 2]) y x z y] z) (set [1 2 3])))
  (import math)
  (let [cos math.cos
        foo-cos (fn [x] (cos x))]
    (assert (= (cos math.pi) -1.0))
    (assert (= (foo-cos (- math.pi)) -1.0))
    (let [cos (fn [_] "cos has been locally rebound")]
      (assert (= (cos cos) "cos has been locally rebound"))
      (assert (= (-> math.pi (/ 3) foo-cos (round 2)) 0.5)))
    (setv cos (fn [_] "cos has been rebound by setv"))
    (assert (= (foo-cos foo-cos) "cos has been rebound by setv"))))


(defn test-if-mangler []
  "NATIVE: test that we return ifs"
  (assert (= true (if true true true))))


(defn test-nested-mangles []
  "NATIVE: test that we can use macros in mangled code"
  (assert (= ((fn [] (-> 2 (+ 1 1) (* 1 2)))) 8)))


(defn test-let-scope []
  "NATIVE: test let works rightish"
  (setv y 123)
  (assert (= (let [x 1
                   y 2
                   z 3]
               (+ x y z))
             6))
  (try
   (assert (= x 42))                   ; This ain't true
   (except [e [NameError]] (assert e)))
  (assert (= y 123)))


(defn test-symbol-utf-8 []
  "NATIVE: test symbol encoded"
  (let [♥ "love"
        ⚘ "flower"]
    (assert (= (+ ⚘ ♥) "flowerlove"))))


(defn test-symbol-dash []
  "NATIVE: test symbol encoded"
  (let [♥-♥ "doublelove"
        -_- "what?"]
    (assert (= ♥-♥ "doublelove"))
    (assert (= -_- "what?"))))


(defn test-symbol-question-mark []
  "NATIVE: test foo? -> is_foo behavior"
  (let [foo? "nachos"]
    (assert (= is_foo "nachos"))))


(defn test-and []
  "NATIVE: test the and function"
  (let [and123 (and 1 2 3)
        and-false (and 1 False 3)
        and-true (and)
        and-single (and 1)]
    (assert (= and123 3))
    (assert (= and-false False))
    (assert (= and-true True))
    (assert (= and-single 1)))
  ; short circuiting
  (setv a 1)
  (and 0 (setv a 2))
  (assert (= a 1)))


(defn test-or []
  "NATIVE: test the or function"
  (let [or-all-true (or 1 2 3 True "string")
        or-some-true (or False "hello")
        or-none-true (or False False)
        or-false (or)
        or-single (or 1)]
    (assert (= or-all-true 1))
    (assert (= or-some-true "hello"))
    (assert (= or-none-true False))
    (assert (= or-false nil))
    (assert (= or-single 1)))
  ; short circuiting
  (setv a 1)
  (or 1 (setv a 2))
  (assert (= a 1)))


(defn test-xor []
  "NATIVE: test the xor macro"
  (let [xor-both-true (xor true true)
        xor-both-false (xor false false)
        xor-true-false (xor true false)]
    (assert (= xor-both-true false))
    (assert (= xor-both-false false))
    (assert (= xor-true-false true))))

(defn test-if-return-branching []
  "NATIVE: test the if return branching"
                                ; thanks, algernon
  (assert (= 1 (let [x 1
                     y 2]
                 (if true
                   2)
                 1)))
  (assert (= 1 (let [x 1 y 2]
                 (do)
                 (do)
                 ((fn [] 1))))))


(defn test-keyword []
  "NATIVE: test if keywords are recognised"

  (assert (= :foo :foo))
  (assert (= (get {:foo "bar"} :foo) "bar"))
  (assert (= (get {:bar "quux"} (get {:foo :bar} :foo)) "quux")))

(defn test-keyword-clash []
  "NATIVE: test that keywords do not clash with normal strings"

  (assert (= (get {:foo "bar" ":foo" "quux"} :foo) "bar"))
  (assert (= (get {:foo "bar" ":foo" "quux"} ":foo") "quux")))

(defn test-nested-if []
  "NATIVE: test nested if"
  (for [x (range 10)]
    (if (in "foo" "foobar")
      (do
       (if true true true))
      (do
       (if false false false)))))


(defn test-eval []
  "NATIVE: test eval"
  (assert (= 2 (eval (quote (+ 1 1)))))
  (setv x 2)
  (assert (= 4 (eval (quote (+ x 2)))))
  (setv test-payload (quote (+ x 2)))
  (setv x 4)
  (assert (= 6 (eval test-payload)))
  (assert (= 9 ((eval (quote (fn [x] (+ 3 3 x)))) 3)))
  (assert (= 1 (eval (quote 1))))
  (assert (= "foobar" (eval (quote "foobar"))))
  (setv x (quote 42))
  (assert (= x (eval x)))
  (assert (= 27 (eval (+ (quote (*)) (* [(quote 3)] 3)))))
  (assert (= None (eval (quote (print ""))))))


(defn test-eval-globals []
  "NATIVE: test eval with explicit global dict"
  (assert (= 'bar (eval (quote foo) {'foo 'bar})))
  (assert (= 1 (let [d {}] (eval '(setv x 1) d) (eval (quote x) d))))
  (let [d1 {}
        d2 {}]
    (eval '(setv x 1) d1)
    (try
      (do
         ; this should fail with a name error
         (eval (quote x) d2)
         (assert False "We shouldn't have arrived here"))
      (except [e Exception]
        (assert (isinstance e NameError))))))

(defn test-eval-failure []
  "NATIVE: test eval failure modes"
  ; yo dawg
  (try (eval '(eval)) (except [e HyTypeError]) (else (assert False)))
  (try (eval '(eval "snafu")) (except [e HyTypeError]) (else (assert False)))
  (try (eval 'false []) (except [e HyTypeError]) (else (assert False)))
  (try (eval 'false {} 1) (except [e HyTypeError]) (else (assert False))))


(defn test-import-syntax []
  "NATIVE: test the import syntax."

  ;; Simple import
  (import sys os)

  ;; from os.path import basename
  (import [os.path [basename]])
  (assert (= (basename "/some/path") "path"))

  ;; import os.path as p
  (import [os.path :as p])
  (assert (= p.basename basename))

  ;; from os.path import basename as bn
  (import [os.path [basename :as bn]])
  (assert (= bn basename))

  (import [sys])

  ;; Multiple stuff to import
  (import sys [os.path [dirname]]
          [os.path :as op]
          [os.path [dirname :as dn]])
  (assert (= (dirname "/some/path") "/some"))
  (assert (= op.dirname dirname))
  (assert (= dn dirname)))


(defn test-lambda-keyword-lists []
  "NATIVE: test lambda keyword lists"
  (defn foo (x &rest xs &kwargs kw) [x xs kw])
  (assert (= (foo 10 20 30) [10 (, 20 30) {}])))


(defn test-key-arguments []
  "NATIVE: test &key function arguments"
  (defn foo [&key {"a" None "b" 1}] [a b])
  (assert (= (foo) [None 1]))
  (assert (= (apply foo [] {"a" 2}) [2 1]))
  (assert (= (apply foo [] {"b" 42}) [None 42])))


(defn test-optional-arguments []
  "NATIVE: test &optional function arguments"
  (defn foo [a b &optional c [d 42]] [a b c d])
  (assert (= (foo 1 2) [1 2 None 42]))
  (assert (= (foo 1 2 3) [1 2 3 42]))
  (assert (= (foo 1 2 3 4) [1 2 3 4])))


(defn test-undefined-name []
  "NATIVE: test that undefined names raise errors"
  (try
   (do
    xxx
    (assert False))
   (except [NameError])))

(defn test-if-let-mixing []
  "NATIVE: test that we can now mix if and let"
  (assert (= 0 (if true (let [x 0] x) 42))))

(defn test-if-in-if []
  "NATIVE: test that we can use if in if"
  (assert (= 42
             (if (if 1 True False)
               42
               43)))
  (assert (= 43
             (if (if 0 True False)
               42
               43))))


(defn test-try-except-return []
  "NATIVE: test we can return from in a try except"
  (assert (= ((fn [] (try xxx (except [NameError] (+ 1 1))))) 2))
  (setv foo (try xxx (except [NameError] (+ 1 1))))
  (assert (= foo 2))
  (setv foo (try (+ 2 2) (except [NameError] (+ 1 1))))
  (assert (= foo 4)))


(defn test-require []
  "NATIVE: test requiring macros from python code"
  (try
    (assert (= "this won't happen" (qplah 1 2 3 4)))
  (except [NameError]))
  (require tests.resources.tlib)
  (assert (= [1 2 3] (qplah 1 2 3))))


(defn test-require-native []
  "NATIVE: test requiring macros from native code"
  (assert (= "failure"
             (try
              (do (setv x [])
                  (rev (.append x 1) (.append x 2) (.append x 3))
                  (assert (= x [3 2 1]))
                  "success")
              (except [NameError] "failure"))))
  (import tests.native_tests.native_macros)
  (assert (= "failure"
             (try
              (do (setv x [])
                  (rev (.append x 1) (.append x 2) (.append x 3))
                  (assert (= x [3 2 1]))
                  "success")
              (except [NameError] "failure"))))
  (require tests.native_tests.native_macros)
  (assert (= "success"
             (try
              (do (setv x [])
                  (rev (.append x 1) (.append x 2) (.append x 3))
                  (assert (= x [3 2 1]))
                  "success")
              (except [NameError] "failure")))))


(defn test-encoding-nightmares []
  "NATIVE: test unicode encoding escaping crazybits"
  (assert (= (len "ℵℵℵ♥♥♥\t♥♥\r\n") 11)))


(defn test-keyword-dict-access []
  "NATIVE: test keyword dict access"
  (assert (= "test" (:foo {:foo "test"}))))


(defn test-take []
  "NATIVE: test the take operator"
  (assert (= [1 2 3] (list (take 3 [1 2 3]))))
  (assert (= [1 2 3] (list (take 4 [1 2 3]))))
  (assert (= [1 2] (list (take 2 [1 2 4])))))


(defn test-break-breaking []
  "NATIVE: test checking if break actually breaks"
  (defn holy-grail [] (for [x (range 10)] (if (= x 5) (break))) x)
  (assert (= (holy-grail) 5)))


(defn test-continue-continuation []
  "NATIVE: test checking if continue actually continues"
  (setv y [])
  (for [x (range 10)]
    (if (!= x 5)
      (continue))
    (.append y x))
  (assert (= y [5])))


(defn test-empty-list []
  "Evaluate an empty list to a []"
  (assert (= () [])))


(defn test-string []
  (assert (string? (string "a")))
  (assert (string? (string 1)))
  (assert (= u"unicode" (string "unicode"))))

(defn test-del []
  "NATIVE: Test the behavior of del"
  (setv foo 42)
  (assert (= foo 42))
  (del foo)
  (assert (= 'good
    (try
      (do foo 'bad)
      (except [NameError] 'good))))
  (setv test (list (range 5)))
  (del (get test 4))
  (assert (= test [0 1 2 3]))
  (del (get test 2))
  (assert (= test [0 1 3]))
  (assert (= (del) nil)))


(defn test-macroexpand []
  "Test macroexpand on ->"
  (assert (= (macroexpand '(-> (a b) (x y)))
             '(x (a b) y)))
  (assert (= (macroexpand '(-> (a b) (-> (c d) (e f))))
             '(e (c (a b) d) f))))


(defn test-macroexpand-1 []
  "Test macroexpand-1 on ->"
  (assert (= (macroexpand-1 '(-> (a b) (-> (c d) (e f))))
             '(-> (a b) (c d) (e f)))))

(defn test-merge-with []
  "NATIVE: test merge-with"
  (assert (= (merge-with + {} {}) nil))
  (assert (= (merge-with + {"a" 10 "b" 20} {}) {"a" 10 "b" 20}))
  (assert (= (merge-with + {} {"a" 10 "b" 20}) {"a" 10 "b" 20}))
  (assert (= (merge-with + {"a" 10 "b" 20} {"a" 1 "c" 30})
	     {"a" 11 "b" 20 "c" 30}))
  (assert (= (merge-with +
                         {:a 1  :b 2}
                         {:a 9  :b 98  :c 0}
                         {:a 10 :b 100 :c 10}
                         {:a 5}
                         {:c 5  :d 42})
             {:d 42 :c 15 :a 25 :b 200}))
  (assert (= (merge-with or_
                         {"a" (set [1 2 3]) "b" (set [4 5 6])}
                         {"a" (set [2 3 7 8]) "c" (set [1 2 3])})
             {"a" (set [1 2 3 7 8]) "c" (set [1 2 3]) "b" (set [4 5 6])})))

(defn test-calling-module-name []
  "NATIVE: Test the calling-module-name function"
  (assert (= (calling-module-name -1) "hy.core.language"))
  (assert (= (calling-module-name 0) "tests.native_tests.language")))


(defn test-disassemble []
  "NATIVE: Test the disassemble function"
  (if PY35
    (assert (= (disassemble '(do (leaky) (leaky) (macros)))
               "Module(\n    body=[Expr(value=Call(func=Name(id='leaky'), args=[], keywords=[])),\n        Expr(value=Call(func=Name(id='leaky'), args=[], keywords=[])),\n        Expr(value=Call(func=Name(id='macros'), args=[], keywords=[]))])"))
    (assert (= (disassemble '(do (leaky) (leaky) (macros)))
               "Module(\n    body=[\n        Expr(value=Call(func=Name(id='leaky'), args=[], keywords=[], starargs=None, kwargs=None)),\n        Expr(value=Call(func=Name(id='leaky'), args=[], keywords=[], starargs=None, kwargs=None)),\n        Expr(value=Call(func=Name(id='macros'), args=[], keywords=[], starargs=None, kwargs=None))])")))
  (assert (= (disassemble '(do (leaky) (leaky) (macros)) true)
             "leaky()\nleaky()\nmacros()")))


(defn test-attribute-access []
  "NATIVE: Test the attribute access DSL"
  (defclass mycls [object])

  (setv foo [(mycls) (mycls) (mycls)])
  (assert (is (. foo) foo))
  (assert (is (. foo [0]) (get foo 0)))
  (assert (is (. foo [0] --class--) mycls))
  (assert (is (. foo [1] --class--) mycls))
  (assert (is (. foo [(+ 1 1)] --class--) mycls))
  (assert (= (. foo [(+ 1 1)] --class-- --name-- [0]) "m"))
  (assert (= (. foo [(+ 1 1)] --class-- --name-- [1]) "y"))

  (setv bar (mycls))
  (setv (. foo [1]) bar)
  (assert (is bar (get foo 1)))
  (setv (. foo [1] test) "hello")
  (assert (= (getattr (. foo [1]) "test") "hello")))

(defn test-keyword-quoting []
  "NATIVE: test keyword quoting magic"
  (assert (= :foo "\ufdd0:foo"))
  (assert (= `:foo "\ufdd0:foo")))

(defn test-only-parse-lambda-list-in-defn []
  "NATIVE: test lambda lists are only parsed in defn"
  (try
   (foo [&rest spam] 1)
   (except [NameError] True)
   (else (raise AssertionError))))

(defn test-read []
  "NATIVE: test that read takes something for stdin and reads"
  (if-python2
    (import [StringIO [StringIO]])
    (import [io [StringIO]]))
  (import [hy.models.expression [HyExpression]])

  (def stdin-buffer (StringIO "(+ 2 2)\n(- 2 2)"))
  (assert (= (eval (read stdin-buffer)) 4))
  (assert (isinstance (read stdin-buffer) HyExpression))

  "Multiline test"
  (def stdin-buffer (StringIO "(\n+\n41\n1\n)\n(-\n2\n1\n)"))
  (assert (= (eval (read stdin-buffer)) 42))
  (assert (= (eval (read stdin-buffer)) 1))

  "EOF test"
  (def stdin-buffer (StringIO "(+ 2 2)"))
  (read stdin-buffer)
  (try
    (read stdin-buffer)
    (except [e Exception]
      (assert (isinstance e EOFError)))))

(defn test-read-str []
  "NATIVE: test read-str"
  (assert (= (read-str "(print 1)") '(print 1))))

(defn test-keyword-creation []
  "NATIVE: Test keyword creation"
  (assert (= (keyword "foo") :foo))
  (assert (= (keyword "foo_bar") :foo-bar))
  (assert (= (keyword `foo) :foo))
  (assert (= (keyword `foo-bar) :foo-bar))
  (assert (= (keyword 'foo) :foo))
  (assert (= (keyword 'foo-bar) :foo-bar))
  (assert (= (keyword 1) :1))
  (assert (= (keyword 1.0) :1.0))
  (assert (= (keyword :foo_bar) :foo-bar)))

(defn test-name-conversion []
  "NATIVE: Test name conversion"
  (assert (= (name "foo") "foo"))
  (assert (= (name "foo_bar") "foo-bar"))
  (assert (= (name `foo) "foo"))
  (assert (= (name `foo_bar) "foo-bar"))
  (assert (= (name 'foo) "foo"))
  (assert (= (name 'foo_bar) "foo-bar"))
  (assert (= (name 1) "1"))
  (assert (= (name 1.0) "1.0"))
  (assert (= (name :foo) "foo"))
  (assert (= (name :foo_bar) "foo-bar"))
  (assert (= (name test-name-conversion) "test-name-conversion")))

(defn test-keywords []
  "Check keyword use in function calls"
  (assert (= (kwtest) {}))
  (assert (= (kwtest :key "value") {"key" "value"}))
  (assert (= (kwtest :key-with-dashes "value") {"key_with_dashes" "value"}))
  (assert (= (kwtest :result (+ 1 1)) {"result" 2}))
  (assert (= (kwtest :key (kwtest :key2 "value")) {"key" {"key2" "value"}}))
  (assert (= ((get (kwtest :key (fn [x] (* x 2))) "key") 3) 6)))

(defmacro identify-keywords [&rest elts]
  `(list
    (map
     (lambda (x) (if (is-keyword x) "keyword" "other"))
     ~elts)))

(defn test-keywords-and-macros []
  "Macros should still be able to handle keywords as they best see fit."
  (assert
   (= (identify-keywords 1 "bloo" :foo)
      ["other" "other" "keyword"])))

(defn test-argument-destr []
  "Make sure argument destructuring works"
  (defn f [[a b] [c]] (, a b c))
  (assert (= (f [1 2] [3]) (, 1 2 3))))