janet/test/suite0012.janet

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(import ./helper :prefix "" :exit true)
(start-suite 12)

(var counter 0)
(def thunk (delay (++ counter)))
(assert (= (thunk) 1) "delay 1")
(assert (= counter 1) "delay 2")
(assert (= (thunk) 1) "delay 3")
(assert (= counter 1) "delay 4")

(def has-ffi (dyn 'ffi/native))

# FFI check
(compwhen has-ffi
  (ffi/context))

(compwhen has-ffi
  (ffi/defbind memcpy :ptr [dest :ptr src :ptr n :size]))
(compwhen has-ffi
  (def buffer1 @"aaaa")
  (def buffer2 @"bbbb")
  (memcpy buffer1 buffer2 4)
  (assert (= (string buffer1) "bbbb") "ffi 1 - memcpy"))

(compwhen has-ffi
  (assert (= 8 (ffi/size [:int :char])) "size unpacked struct 1")
  (assert (= 5 (ffi/size [:pack :int :char])) "size packed struct 1")
  (assert (= 5 (ffi/size [:int :pack-all :char])) "size packed struct 2")
  (assert (= 4 (ffi/align [:int :char])) "align 1")
  (assert (= 1 (ffi/align [:pack :int :char])) "align 2")
  (assert (= 1 (ffi/align [:int :char :pack-all])) "align 3")
  (assert (= 26 (ffi/size [:char :pack :int @[:char 21]])) "array struct size"))

(end-suite)