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Article contents:== Outdated egg! This is an egg for CHICKEN 4, the unsupported old release. You're almost certainly looking for [[/eggref/5/dummy-user|the CHICKEN 5 version of this egg]], if it exists. If it does not exist, there may be equivalent functionality provided by another egg; have a look at the [[https://wiki.call-cc.org/chicken-projects/egg-index-5.html|egg index]]. Otherwise, please consider porting this egg to the current version of CHICKEN. == dummy-user Simulates user input for testing interactive command-line programs. [[toc:]] === Author Matt Gushee === Repository [[https://github.com/mgushee/dummy-user]] === API ==== make-dummy-user <procedure>(make-dummy-user STRINGS)</procedure> Given a list of strings representing a sequence of user input, this procedure returns a {{DUMMY-USER}} closure, which responds to the following messages: (USER 'input) (USER 'output) These calls return, respectively, an input and an output port. Generally you do not need to use them directly; they are used by {{with-dummy-user}} to rebind {{stdin}} and {{stdout}}. (USER 'reset) Resets the dummy user to its initial state, allowing repeated tests with the same data. (USER 'dump) Returns a list of all data received from and sent to the test program, in the form {{'((program: STRING) (user: STRING) ...)}}. ==== with-dummy-user <procedure>(with-dummy-user USER THUNK [RETURN-RESULT])</procedure> Tests a program with a dummy user; to be precise, it binds {{stdin}} and {{stdout}} to the ports provided by the dummy user. The {{USER}} argument should be a closure such as that produced by {{make-dummy-user}}. {{THUNK}} is a procedure of no arguments that runs the program you wish to test. After running the test program, by default {{with-dummy-user}} calls {{(USER 'dump)}} and returns the result of that call. However, you may provide your own {{RETURN-RESULT}} procedure (with 0 arguments) to cause other data to be returned (e.g. the inputs collected by your program). === Examples <enscript highlight="scheme"> (use dummy-user) (define my-results #f) (define (test-prog) (let ((collected-data (make-queue))) (display "Name: ") (queue-add! collected-data (cons 'name (read-line))) (display "Age: ") (queue-add! collected-data (cons 'age (read-line))) (display "Phone: ") (queue-add! collected-data (cons 'phone (read-line))) (print "OK, thanks!") collected-data)) (define my-dummy (make-dummy-user '("Jenny" "24" "867-5309"))) (pp (with-dummy-user my-dummy test-prog)) ;;; Should print: ((program: "Name: ") (user: "Jenny") (program: "Age: ") (user: "24") ;;; (program: "Phone: ") (user: "867-5309") (program: "OK, Thanks!") (program: "\n")) (my-dummy 'reset) (pp (with-dummy-user my-dummy (lambda () (set! my-results (test-prog))) (lambda () (queue->list my-results)))) ;;; Should print: ((name . "Jenny") (age . "24") (phone . "867-5309")) </enscript> === Requirements None. === License Copyright (c) 2012, Matthew C. Gushee All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. Neither the name of the author nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. === Version history ==== version 0.1 Initial releaseDescription of your changes:

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