The main source of information is the DejaGnu user guide by Rob Savoye . The most useful section is the Unit Testing API, which lists all the procedures. Follow these instructions as closely a possible in order get a good insight into how DejaGnu works, else you might run into a lot of subtle problems. You have. DejaGnu uses the GNU autoconf to configure itself. For more info on using autoconf, read the GNU autoconf manual. To configure, execute the configure.
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Permission is granted to make and distribute verbatim copies of xejagnu manual provided the copyright notice and this permission notice are preserved on all copies. Special copyright terms apply to that Appendix; see section Tcl Overview. Permission is granted to copy and distribute modified versions of this manual under the conditions for verbatim copying, provided sejagnu that the entire resulting derived work is distributed under the terms of a permission notice identical to this one.
Permission is granted to copy and distribute translations of this manual into another language, under the above conditions for modified versions.
DejaGnu is a framework for testing other programs. Its purpose is to provide a single front end for all tests. Beyond this, DejaGnu offers several advantages for testing:. DejaGnu is written in expectwhich in turn uses Tcl Tool command language.
Running tests requires two things: Tests are usually written in expect using Tcl, but you can also use a Tcl script to run a test suite that is not mnaual on expect. To run tests mabual an existing collection, first use configure as usual to set up the source directory containing the tests. If the check target exists, it ,anual saves you some trouble–for instance, it dejaagnu set up any auxiliary programs or other files needed by the tests.
Typically, you must use two command-line options: These examples assume a native configuration, where the same computer runs both runtest and the tests themselves. When you have a cross configuration, the tests run on a different computer, controlled by the host running runtest. Mxnual section Defaults for runtest options. By default, runtest prints only the names of the tests it runs, output from any tests that have unexpected edjagnu, and a summary showing how many tests passed and how many failed.
See section Using runtestfor a more detailed explanation of each runtest option. Test output goes into two files in your current directory: See section The files DejaGnu writes. Each DejaGnu test is an expect script; the tests vary widely in complexity, depending on the nature of the tool and the feature tested. Though brief, this example is a complete test. It illustrates some of the main features of DejaGnu test scripts:.
DejaGnu grew out of the internal needs of Cygnus Support. Cygnus maintains and enhances a variety vejagnu free programs in many different environments, and we needed a testing tool that:. Some of the requirements proved challenging. For example, interactive programs do not lend themselves very well to automated testing. But all the requirements are important: Probably the greatest challenge was testing in a cross-development environment which can be a real nightmare.
Most cross-development environments are customized by each developer. Even when buying packaged boards from vendors there are many differences. The communication interfaces vary from a serial line to ethernet. DejaGnu was designed with a modular communication setup, so that each kind of communication can be added as required, and supported thereafter.
Once a communication procedure is coded, any test can use it. Currently DejaGnu can use rshrlogintelnettipkermitand mondfe for remote communications. Julia Menapace first coined the term “Deja Gnu” to describe an earlier testing framework at Cygnus Support.
When we replaced it with the Expect-based framework, it was like DejaGnu all over again An assertion is a description of behavior.
For example, if a standard says “The sun shall shine”, a corresponding assertion might be “The sun is shining. It is important to note that the standard being tested is never Fejagnu of the main things Four messages are supported for a required feature of POSIX conforming systems, and a fifth for a conditional feature.
Dejagnu – Free Software Directory
DejaGnu supports the use of all five output messages; in this sense a test suite that uses exactly these messages can be considered POSIX conforming. These definitions specify the output of a test case:. The only remaining output message left is intended to test features that are specified by the applicable POSIX standard as conditional:.
DejaGnu uses the same output procedures to produce these messages for all test suites, and these procedures are already known to conform to POSIX In the near future, there are two parallel directions for DejaGnu development.
runtest(1) – Linux man page
The first is to add support for more hosts and targets. The second would permit testing programs with a more complex interface, whether text based or GUI based. Two components already exist: Both of these could be maunal into DejaGnu in a way that permits testing programs that run in each environment. We encourage you to make any test suites you create freely available, under the same terms as DejaGnu itself.
DejaGnu Testing Framework – What is DejaGnu?
Tcl was introduced in a paper by John K. Ousterhout at the Winter Usenix conference, Tcl: An Embeddable Command Language.
See section Tcl Overviewfor details on Tcl. The version of Tcl included in DejaGnu at this time is Tcl 6. Don Libes introduced expect in his paper expect: The paper is included in PostScript form in the expect distribution as are several other papers about expect. Programmed Dialoguefor details on expect. The version of expect ddejagnu in DejaGnu at this time is expect 4.