frysk.expunit, Expect like functionality within JUnit

[Andrew Cagney <cagney at redhat dot com>]

Hello,

The Expect program lets the user interact with a console based program, 
sending it input and checking its output.  The existing testing 
framework dejagnu builds on expect.

The package frysk.expunit provides functionality similar to Expect, but 
in a way that integrates into the JUnit framework.  By doing this, 
developers:

-> need only learn JUnit, and this extension, and not an entirely new 
language (tcl/tk) and test framework (dejagnu)

-> are able to implement tests in a similar consistent manner, in 
particular, first problem indicates failure - frameworks such as dejagnu 
have a very different testing model, allowing a failing test to bumble 
on regardless

With this in place I'll look at a few of the existing dejagnu tests, see 
how well they translate, and how workable the existing interfaces are.

See 
http://sourceware.org/frysk/javadoc/public/frysk/expunit/package-summary.html
for a simple example.  Critic, expecially of the workability of the 
interfaces, most welcome.

Andrew

PS: This proved to be a good way of expanding the testing of 
frysk.sys.PseudoTerminal