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| >DejaGnu: The GNU Testing Framework</TH |
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| >Design Goals</H1 |
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| >DejaGnu grew out of the internal needs of Cygnus Solutions, |
| the company formerly known as Cygnus Support. Cygnus maintained |
| and enhanced a variety of free programs in many different |
| environments and we needed a testing tool that:</P |
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| >was useful to developers while fixing |
| bugs;</P |
| ></LI |
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| >automated running many tests during a software |
| release process;</P |
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| >was portable among a variety of host |
| computers;</P |
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| ><P |
| >supported cross-development |
| testing;</P |
| ></LI |
| ><LI |
| STYLE="list-style-type: disc" |
| ><P |
| >permitted testing interactive programs, like |
| <B |
| CLASS="COMMAND" |
| >GDB</B |
| >; and </P |
| ></LI |
| ><LI |
| STYLE="list-style-type: disc" |
| ><P |
| >permitted testing batch oriented programs, like |
| <B |
| CLASS="COMMAND" |
| >GCC</B |
| >.</P |
| ></LI |
| ></UL |
| ><P |
| >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: for instance, it is imperative to |
| make sure that <B |
| CLASS="COMMAND" |
| >GDB</B |
| > works as well when cross-debugging |
| as it does in a native configuration. </P |
| ><P |
| >Probably the greatest challenge was testing in a |
| cross-development environment. 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 <B |
| CLASS="COMMAND" |
| >rsh</B |
| >, |
| <B |
| CLASS="COMMAND" |
| >rlogin</B |
| >, <B |
| CLASS="COMMAND" |
| >telnet</B |
| >, |
| <B |
| CLASS="COMMAND" |
| >tip</B |
| >, <B |
| CLASS="COMMAND" |
| >kermit</B |
| > and |
| <B |
| CLASS="COMMAND" |
| >mondfe</B |
| > for remote communications.</P |
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