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For 2023 (and 2024 ...) - we are now fully retired from IT training.
We have made many, many friends over 25 years of teaching about Python, Tcl, Perl, PHP, Lua, Java, C and C++ - and MySQL, Linux and Solaris/SunOS too. Our training notes are now very much out of date, but due to upward compatability most of our examples remain operational and even relevant ad you are welcome to make us if them "as seen" and at your own risk.

Lisa and I (Graham) now live in what was our training centre in Melksham - happy to meet with former delegates here - but do check ahead before coming round. We are far from inactive - rather, enjoying the times that we are retired but still healthy enough in mind and body to be active!

I am also active in many other area and still look after a lot of web sites - you can find an index ((here))
Using Tcl to test a system with the tcltest module


Many users of Tcl are using it for running applications which test other software, pieces of hardware, configurations, conditions, etc. Naturally, such testing environments require a great number of tests to be formulated, written, managed and run, and to have the results correlated.

It's also natural in such a testing environment for the system to be required to run hundreds or thousands of tests, with most of them being passed and only a few failing. In such a circumstance, the resultant reporting needs to be of a nature that it highlights the failures and summarises or even ignores the successes.

The test command in the tcltest package runs a command or block, and checks that the result is in line with a prediction. If it fails, output is generated with describes what was expected and what actually happened. If it succeeds, little or no feedback is given.

Tests can have constraints applied to them, and can have setup and cleanup operations described as well so that the mechanism can be used to run tests only in certain circumstances, or when there are certain pre-requisite actions performed.

A series of different tests can be developed in separate scripts and then run together as a test suite through a single controlling script, or even interactively - yet the maintenance of each test can remain with the original programmer who formulated the test

See also Tcl training modules

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Related Material

Tcl/Tk - The Tcltest Package
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resource index - TclTk
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You'll find shorter technical items at The Horse's Mouth and delegate's questions answered at the Opentalk forum.

At Well House Consultants, we provide training courses on subjects such as Ruby, Lua, Perl, Python, Linux, C, C++, Tcl/Tk, Tomcat, PHP and MySQL. We're asked (and answer) many questions, and answers to those which are of general interest are published in this area of our site.

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