Software Development Cross Solution - Index of - Free

lack box testing
There are three ways to look at your system...
Good testing is essential on any software project. If your software doesn’t work,
it won’t get used—and there’s a good chance you won’t get paid. So before
getting into the nitty-gritty of software testing, it’s important to step back
and remember that different people look at your system from totally different
perspectives, or views.
238 Chapter 7
Your users see the system from the outside
Your users don’t see your code, they don’t look at the database
tables, they don’t evaluate your algorithms...and generally they
don’t want to. Your system is a black box to them; it either
does what they asked it to do, or it doesn’t. Your users are all
about functionality.
Testers peek under the covers a little
Testers are a different breed. They’re looking for
functionality, but they’re usually poking underneath to
make sure things are really happening the way you said
they would. Your system is more of a grey box to them.
Testers are probably looking at the data in your database to
make sure things are being cleaned up correctly; they might
be checking that ports are closed, network connections
dropped, and that memory usage is staying steady.
Developers let it all hang out
Developers are in the weeds. They see good (and sometimes
bad) class design, patterns, duplicated code, inconsistencies
in how things are represented. The system is wide open to
them. If users see a system as a closed black box, developers
see it as an open white box. But sometimes because
developers see so much detail, it’s possible for them to miss
broken functionality or make an assumption that a tester or
end user might not.
...and you need to consider each of these views
Each view of your system is valid, and you have to test from
each of those three perspectives.
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For more on these
different types of testing,
see Appendix i.
TestGoodDBAccessor
+ getGC(gcId : int) :GiftCard
+ saveGC(card : GiftCard) :void
Order
DBAccessor
+ getGC(gcId : int) :GiftCard
+ saveGC(card : GiftCard) :void
TestInsufficientDBAccessor
+ getGC(gcId : int) :GiftCard
+ saveGC(card : GiftCard) :void
DB
TestInvalidDBAccessor
+ getGC(gcId : int) :GiftCard
+ saveGC(card : GiftCard) :void
check balances, etc.
saveOrder(...) insert into ...
saveGC(...)
update amnt ...
MySqlDBAccessor
+ getGC(gcId : int) :GiftCard
+ saveGC(card : GiftCard) :void