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Re: [Xotcl] test driven development
From: Gustaf Neumann <neumann_at_wu-wien.ac.at>
Date: Tue, 26 Apr 2011 14:54:16 +0200
Just to provide a short addon to stefan's long response:
- some tests in xotcl/nx are indeed legacy of otcl
(testo.xotcl).
- the first generation of regression tests were written in
the otcl style (testx.xotcl).
- these tests are in part "designed", but also in part
tricky cases derived from bug reports.
Many of these tests are rather integration tests than
unit tests, testing interdependencies of language features.
From the debugging point of view these are a mess, since it
might take quite some time to find the source of a
misbehavior. At the same time, these are real-world examples
and they are valuable for the project, since these are
testing simultaneously several complex features, so i'll
leave these for the time being.
The newer generation of tests (package nx::test) are built
just around the needs of xotcl/nx, for making testing more
convenient. nx::test is an
- oo-based test environment with
- automated cleanup for the objects created in a test run,
- provides error/exception handling and
- simple means for speed comparison,
- triggers routines for internal (c-level) consistency
checking, and
- provides a simple syntax
Writing test environments in Tcl is very simple and quite
straightforward, but depending on your needs, different
approaches are reasonable.
In case, you are in an environment where you are using
already many xUnit tests for several other languages, and
you are using eclipse, you might find xounit from Ben
Thomasson useful (some more pointer in addition to Stefan's)
http://xotcllib.sourceforge.net/xounit.html
which seems to be integrated via plugin into eclipse.dltk
http://dev.eclipse.org/viewcvs/viewvc.cgi/org.eclipse.dltk/xotcl/plugins/org.eclipse.dltk.xotcl.testing.xounit/?root=Technology_Project&sortby=author
http://download.eclipse.org/eclipse/pde/apitools/eclipse-galileo-rc4/api-html/org.eclipse.dltk.core/org.eclipse.dltk.xotcl.testing.xounit/org.eclipse.dltk.xotcl.testing.xounit.html
some people seem to like tclTkUnit (which disappeared from
the public pages a few years ago) which is as well modeled
close to JUnit:
http://classic-web.archive.org/web/20080822172425/http://park.ruru.ne.jp/ando/work/tclTkUnit/
-gustaf neumann
Date: Tue, 26 Apr 2011 14:54:16 +0200
Just to provide a short addon to stefan's long response:
- some tests in xotcl/nx are indeed legacy of otcl
(testo.xotcl).
- the first generation of regression tests were written in
the otcl style (testx.xotcl).
- these tests are in part "designed", but also in part
tricky cases derived from bug reports.
Many of these tests are rather integration tests than
unit tests, testing interdependencies of language features.
From the debugging point of view these are a mess, since it
might take quite some time to find the source of a
misbehavior. At the same time, these are real-world examples
and they are valuable for the project, since these are
testing simultaneously several complex features, so i'll
leave these for the time being.
The newer generation of tests (package nx::test) are built
just around the needs of xotcl/nx, for making testing more
convenient. nx::test is an
- oo-based test environment with
- automated cleanup for the objects created in a test run,
- provides error/exception handling and
- simple means for speed comparison,
- triggers routines for internal (c-level) consistency
checking, and
- provides a simple syntax
Writing test environments in Tcl is very simple and quite
straightforward, but depending on your needs, different
approaches are reasonable.
In case, you are in an environment where you are using
already many xUnit tests for several other languages, and
you are using eclipse, you might find xounit from Ben
Thomasson useful (some more pointer in addition to Stefan's)
http://xotcllib.sourceforge.net/xounit.html
which seems to be integrated via plugin into eclipse.dltk
http://dev.eclipse.org/viewcvs/viewvc.cgi/org.eclipse.dltk/xotcl/plugins/org.eclipse.dltk.xotcl.testing.xounit/?root=Technology_Project&sortby=author
http://download.eclipse.org/eclipse/pde/apitools/eclipse-galileo-rc4/api-html/org.eclipse.dltk.core/org.eclipse.dltk.xotcl.testing.xounit/org.eclipse.dltk.xotcl.testing.xounit.html
some people seem to like tclTkUnit (which disappeared from
the public pages a few years ago) which is as well modeled
close to JUnit:
http://classic-web.archive.org/web/20080822172425/http://park.ruru.ne.jp/ando/work/tclTkUnit/
-gustaf neumann