Section 18.1. Test Cases


18.1. Test Cases

Write the test cases first.

Probably the single best practice in all of software development is writing your test suite first.

A test suite is an executable, self-verifying specification of the behaviour of a piece of software. If you have a test suite, you canat any point in the development processverify that the code works as expected. If you have a test suite, you canafter any changes during the maintenance cycleverify that the code is still working as expected.

So write the tests first. Write them as soon as you know what your interface will be (see "Interfaces" in Chapter 17). Write them before you start coding your application or module. Because unless you have tests, you have no unequivocal specification of what the software is supposed to do, and no way of knowing whether it does it.



Perl Best Practices
Perl Best Practices
ISBN: 0596001738
EAN: 2147483647
Year: 2004
Pages: 350
Authors: Damian Conway

flylib.com © 2008-2017.
If you may any questions please contact us: flylib@qtcs.net