A Perl toolbox for regression tests

TESTING TOOLS

Author(s):

With a test suite, you can fix bugs and add new features without ruining the existing codebase.

A program that works right the first time is uncommon enough to make you suspicious. In test-driven development, developers first define a test case before implementing a feature. Inevitably, the test will fail at first, but as soon as the feature gets implemented – presto – the test suite gives a thumbs up. This technique motivates developers throughout the development lifecycle; each new test adds to the test suite and will be executed again and again as the project emerges. Small steps add up to a detailed test suite that no quality management department in the world would be capable of achieving. In case of ongoing development and refactoring, there is always some danger of a change introducing undesirable side effects. Having the ability to run hundreds of test cases at no cost takes the worries out of replacing parts of a system. Developers can roll out new releases on a regular basis and yet sleep tight and enjoy sweet dreams. You don’t need to be an Extreme Programming enthusiast to see the benefits.

Read full article as PDF:

Perl_Regression_Tests.pdf (203.15 kB)

Related content

  • Perl: Test-Driven Development

    Test-driven development with a full-coverage regression test suite as a useful side effect promises code with fewer errors. Mike "Perlmeister" Schilli enters the same path of agility and encounters a really useful new CPAN module.

  • Perl: Web Regression Test

    Testing complex web applications does not necessarily mean investing in expensive, proprietary tools such as Test Director or Silk Performer. Selenium is for free; it can remotely control any major browser, and it is programmable in Perl.

  • Perl: Cucumber

    The Cucumber test framework helps developers and product departments jointly formulate test cases, not as program code, but in plain English. The initially skeptical Perlmeister has acquired a taste for this.

  • Perl: Math Tricks

    A trick that anybody can learn lets you determine the day of the week from the date. We’ll apply some Perl technology to discover whether the method is reliable.

  • Perl: Travis CI

    A new service on travis-ci.org picks up GitHub projects, runs new code through test suites, and notifies the owners if the build fails. Its API enables Perl scripts to gather historical build data, including who-broke-the-build tabulations.

comments powered by Disqus

Direct Download

Read full article as PDF:

Perl_Regression_Tests.pdf (203.15 kB)

News