From cdd64714ad68980aaaa53bca0864d239cc2825ab Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Hugo=20H=C3=B6rnquist?= Date: Thu, 30 Jul 2020 13:28:35 +0200 Subject: Add stream-paginate. --- tests/srfi-41-util.scm | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 tests/srfi-41-util.scm (limited to 'tests') diff --git a/tests/srfi-41-util.scm b/tests/srfi-41-util.scm new file mode 100644 index 00000000..61bce71e --- /dev/null +++ b/tests/srfi-41-util.scm @@ -0,0 +1,35 @@ +(((srfi srfi-41 util) stream-paginate) + ((srfi srfi-41) stream->list stream-ref stream-from + stream-filter stream-car stream) + ((ice-9 sandbox) call-with-time-limit) + ) + +(test-equal "Finite stream" + '((0 1 2) (3 4 5) (6 7 8) (9)) + (let ((strm + (stream-paginate (stream 0 1 2 3 4 5 6 7 8 9) + 3))) + (map stream->list (stream->list strm)))) + + +(test-equal "slice of infinite" + '(1000 1001 1002 1003 1004 1005 1006 1007 1008 1009) + (let ((strm (stream-paginate (stream-from 0)))) + (stream->list (stream-ref strm 100)))) + + + +(define unique-symbol (gensym)) + +(test-equal "time out on infinite 'empty' stream" + unique-symbol + ;; defined outside time limit since creation should always + ;; succeed. Only reference is expected to fail. + (let ((strm (stream-paginate + ;; easy way to get stream which never finds + ;; any elements. + (stream-filter negative? (stream-from 0))))) + (call-with-time-limit + 0.1 + (lambda () (stream-car strm)) + (lambda _ unique-symbol)))) -- cgit v1.2.3