Commit f0afa57b authored by Marius Gerbershagen's avatar Marius Gerbershagen
Browse files

tests: fix mix.0016.fifo-tests

Use new :nonblock open flag, only test standard POSIX
behaviour (POSIX leaves it undefined what happens when
opening a fifo for writing in nonblocking mode while
there are no readers available. Previously we were
testing for behaviour as implemented by Linux).

Windows has no equivalent of a named pipe that can be
opened like a regular file, thus we disable the test
parent da26facf
......@@ -256,42 +256,29 @@
;;; Date: 2018-05-08
;;; Description:
;;; Better handling of fifos. This test will most likely fail on Windows (this
;;; is not confirmed yet) because it does not support non-blocking
;;; operations.
;;; When we figure out what would be correct semantics for Windows this test
;;; should be disabled for that platform and a separate test case ought to be
;;; created. It is possible that it won't fail (because cygwin will handle it
;;; gracefully and/or WinAPI does not support file-pipes).
;;; Better handling of fifos.
;;; Bug:
(test mix.0016.fifo-tests
(ext:run-program "mkfifo" '("my-fifo") :output t)
;; 1) reader (first) and writer (inside)
(with-open-file (stream "my-fifo")
(with-open-file (stream "my-fifo" :nonblock t)
(is (null (file-length stream)))
(is (null (listen stream)))
(is (eql :foo (read-line stream nil :foo)))
(is (eql :fifo (ext:file-kind stream nil)))
(with-open-file (stream2 "my-fifo" :direction :output)
;; Even for output it should not block on Linux.
(with-open-file (stream2 "my-fifo" :direction :output :nonblock t)
;; Even for output it should not block on Unix.
(finishes (write-line "foobar" stream2)))
(is (equal "foobar" (read-line stream nil :foo))))
;; 2) writer (first) and reader (second)
(with-open-file (stream "my-fifo" :direction :output)
(finishes (write-line "foobar" stream)))
(with-open-file (stream "my-fifo" :direction :input)
;; there is nobody on the other side, data is lost
(is (equal :foo (read-line stream nil :foo))))
;; 2) writer (first) and reader (second)
(signals file-error (open "my-fifo" :direction :output :nonblock t))
(with-open-file (stream "my-fifo" :direction :input :nonblock t)
(is (eql :foo (read-line stream nil :foo))))
;; 3) writer (first) and reader (inside)
(with-open-file (stream "my-fifo" :direction :output)
(finishes (write-line "foobar" stream))
(with-open-file (stream2 "my-fifo" :direction :input)
;; Even for output it should not block on Linux.
(is (equal "foobar" (read-line stream2 nil :foo)))))
;; clean up
(ext:run-program "rm" '("-rf" "my-fifo") :output t))
(delete-file "my-fifo"))
;;; Date: 2018-12-02
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