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;; Tests of `try` and `raise`
(import
pytest)
(defn test-try-missing-parts []
(assert (is (try) None))
(assert (= (try 1) 1))
(assert (is (try (except [])) None))
(assert (is (try (finally)) None))
(assert (= (try 1 (finally 2)) 1))
(assert (is (try (else)) None))
(assert (= (try 1 (else 2)) 2)))
(defn test-try-multiple-statements []
(setv value 0)
(try (+= value 1) (+= value 2) (except [IOError]) (except []))
(assert (= value 3)))
(defn test-try-multiple-expressions []
; https://github.com/hylang/hy/issues/1584
(setv l [])
(defn f [] (.append l 1))
(try (f) (f) (f) (except [IOError]))
(assert (= l [1 1 1]))
(setv l [])
(try (f) (f) (f) (except [IOError]) (else (f)))
(assert (= l [1 1 1 1])))
(defn test-raise-nullary []
;; Test correct (raise)
(setv passed False)
(try
(try
(do)
(raise IndexError)
(except [IndexError] (raise)))
(except [IndexError]
(setv passed True)))
(assert passed)
;; Test incorrect (raise)
(setv passed False)
(try
(raise)
(except [RuntimeError]
(setv passed True)))
(assert passed))
(defn test-try-clauses []
(defmacro try-it [body v1 v2]
`(assert (= (_try-it (fn [] ~body)) [~v1 ~v2])))
(defn _try-it [callback]
(setv did-finally-clause? False)
(try
(callback)
(except [ZeroDivisionError]
(setv out ["aaa" None]))
(except [[IndexError NameError]]
(setv out ["bbb" None]))
(except [e TypeError]
(setv out ["ccc" (type e)]))
(except [e [KeyError AttributeError]]
(setv out ["ddd" (type e)]))
(except [[]]
(assert False))
(except [e []]
(assert False))
(except []
(setv out ["eee" None]))
(else
(setv out ["zzz" None]))
(finally
(setv did-finally-clause? True)))
(assert did-finally-clause?)
out)
(try-it (/ 1 0) "aaa" None)
(try-it (get "foo" 5) "bbb" None)
(try-it unbound "bbb" None)
(try-it (abs "hi") "ccc" TypeError)
(try-it (get {1 2} 3) "ddd" KeyError)
(try-it True.a "ddd" AttributeError)
(try-it (raise ValueError) "eee" None)
(try-it "hi" "zzz" None))
(defn test-finally-executes-for-uncaught-exception []
(setv x "")
(with [(pytest.raises ZeroDivisionError)]
(try
(+= x "a")
(/ 1 0)
(+= x "b")
(finally
(+= x "c"))))
(assert (= x "ac")))
(defn test-nonsyntactical-except []
#[[Test that [except ...] and ("except" ...) aren't treated like (except ...),
and that the code there is evaluated normally.]]
(setv x 0)
(try
(+= x 1)
("except" [IOError] (+= x 1))
(except []))
(assert (= x 2))
(setv x 0)
(try
(+= x 1)
[except [IOError] (+= x 1)]
(except []))
(assert (= x 2)))
(defn test-try-except-return []
"Ensure we can return from an `except` form."
(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-try-else-return []
"Ensure we can return from the `else` clause of a `try`."
; https://github.com/hylang/hy/issues/798
(assert (= "ef" ((fn []
(try
(+ "a" "b")
(except [NameError]
(+ "c" "d"))
(else
(+ "e" "f")))))))
(setv foo
(try
(+ "A" "B")
(except [NameError]
(+ "C" "D"))
(else
(+ "E" "F"))))
(assert (= foo "EF"))
; Check that the lvalue isn't assigned by the main `try` body
; when there's an `else`.
(setv x 1)
(setv y 0)
(setv x
(try
(+ "G" "H")
(except [NameError]
(+ "I" "J"))
(else
(setv y 1)
(assert (= x 1))
; `x` still has its value from before the `try`.
(+ "K" "L"))))
(assert (= x "KL"))
(assert (= y 1)))
(do-mac (when hy.compat.PY3_11 '(defn test-except* []
(setv got "")
(setv return-value (try
(raise (ExceptionGroup "meep" [(KeyError) (ValueError)]))
(except* [KeyError]
(+= got "k")
"r1")
(except* [IndexError]
(+= got "i")
"r2")
(except* [ValueError]
(+= got "v")
"r3")
(else
(+= got "e")
"r4")
(finally
(+= got "f")
"r5")))
(assert (= got "kvf"))
(assert (= return-value "r3")))))
(defn test-raise-from []
(assert (is NameError (type (.
(try
(raise ValueError :from NameError)
(except [e [ValueError]] e))
__cause__)))))
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