Free Ebook Selenium Design Patterns and Best Practices
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Selenium Design Patterns and Best Practices
Free Ebook Selenium Design Patterns and Best Practices
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About the Author
Dima Kovalenko Dima Kovalenko started his career in 2003 as a quality assurance intern during his summer internship at Rosetta Stone. Since then, he has spent many years testing software in both a manual and automated fashion in companies such as ThoughtWorks, Groupon, and many others. He has participated in many different types of projects, including language-learning software, web e-commerce stores, and legacy maintenance for telecommunication and airline companies. His experience includes support to Ruby, Java, iOS, Android, and PHP projects as an automated tester and software developer. His first real experience with computers was at the age of 14, shortly after moving to the United States of America from Russia; this encounter has sparked a lifelong passion for technology.
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Product details
Paperback: 225 pages
Publisher: Packt Publishing - ebooks Account (September 23, 2014)
Language: English
ISBN-10: 1783982705
ISBN-13: 978-1783982707
Product Dimensions:
7.5 x 0.6 x 9.2 inches
Shipping Weight: 1.3 pounds (View shipping rates and policies)
Average Customer Review:
3.7 out of 5 stars
9 customer reviews
Amazon Best Sellers Rank:
#1,002,434 in Books (See Top 100 in Books)
Ruby centric and not much help for C#
Very good one in fact. At least if you take it straight not as another "introduction to Selenium", but as something that addresses the needs of building extensible test automation framework. Yes, it's not giving the depth of actual implementation details and not answering all of the typical questions anyone who developing test harness would raise, that's true. But it gives very good and structured strategy to approach such task, gives informative references to related design patterns and is pretty up to date on technology stack. I'm not aware of any other book on test automation based on Selenium which would address this question.The book would be less controversial and more helpful if author could throw away all "intro to Selenium" elements and concentrate more on design patterns and common culprits of building such frameworks. In other words, target audience is slightly blurred, and that results in frustration for experience professionals looking for architecture ideas and solutions, and not basics of interaction with WebDriver API (in on specific language only, which makes it even worse). Assume your readers know how to click and why not to use Selenium IDE, and you'd get better reviews.But I would not agree that review of bad practices is bad idea. I find it very useful, especially when I need to explain someone why this or that bad idea to do.Topics I really miss here:- test data management strategies in more details,- use of third party wrapper libraries and how it changes general approaches,- specifics of testing projects not so typical in the past years, like single page applications and multi web app systems,- how to address mismatches in functionality when using BDD frameworks for cross application testing,- and of course Java, it's specifics and it's specialized libraries (I love Ruby and promote it all the time, but Java is still a given fact for many of us, so stating "it's all the same" not enough).Will be waiting for 2nd, more mature edition.
Like most Selenium/Webdriver books, the first chapter introduces the Selenium IDE and Selenese which seems inappropriate base on the book's title, having the expectation that design patterns and the latest best practices would be first and foremost. Further, leaving the impression the book is another, "how to" and "some good concepts" when working with Selenium.The authors introduce a number of patterns and concepts, relating to the overall design of the test framework. Though, a number of "patterns" described by the authors are more of programming concepts, principles, or rules, such as "DRY".The portion over page objects provides a great overall understanding of the pattern and why it is widely adopted by a large number of test developers. However, since the code examples are in Ruby, Page Factories (Java) is not mention. Again, the expectation, would take the page object pattern to the next level and introduce new levels of abstraction."Test your tests" section provides a couple of great concepts on stabilization.Overall, minus the first chapter, the book starts the conversation of software patterns and principles, and that being the same as production application development. Though the book covers more "what not to do" then provide real solutions using proper design and coding. In addition, the book lacks a couple concepts, that "tests should be easy to read", the framework code should provide the intent and is self documenting, by using good naming conventions.Nevertheless, the book would help those less experienced in development to start looking for better designs within his/her code and thinking about long term and downstream aspects.
I too started to read the book as others state, but quickly realized it was not for me. Let me clarify: if I was starting out with Selenium (in some form) I would smartly elect to move directly into the form currently supported AND for test code development: Selenium WebDriver. Selenium IDE has its own script language that is not the same as Selenium WebDriver. And Selenium Remote Control (RC) has been deprecated for quite a while. Selenium IDE produces 'brittle' output that makes it fairly disposable. So to talk about other forms of Selenium than WebDriver was not all what I was looking for.My thoughts about the first 1/3 of the book are below:- Talks about using irb (Interactive Ruby Shell) for debugging and lauds its utility. You'll need to take that with a grain of salt. Every IDE's debug mode has its strengths and weaknesses.- I wish (in general) that authors would get straight to the point of suggesting a good/great pattern - and say why it is so good. This likely can be summed up succinctly instead of rambling through a handful that are bad patterns (with examples) chewing up the reader's time. Remember the phrase "Life is short"?- There is a term for his verbose phrase of "no random order". Dependency.- Usually test logs of test steps are generated to help track down issues. Additionally wrappers are often coded around object identifiers and associated methods to also help debugging issues. Screenshots anyone?- The campy sample website: awful-valentine.com? puh-lease. Huge 'picture plate' objectives that could have been easily summarized in simple text one-liners.- The author talks about the 'Big Ball of Mud' design pattern:"Adoption of this pattern is usually unintentional and stems from being developed over long periods of time with different individuals working on different pieces without any overall architectural plan." p.62Whereas the authors of the paper he refers to state:"There are good reasons that good programmers build BIG BALLS OF MUD. It may well be that the economics of the software world are such that the market moves so fast that long term architectural ambitions are foolhardy, and that expedient, slash-and-burn, disposable programming is, in fact, a state-of-the-art strategy. The success of these approaches, in any case, is undeniable, and seals their pattern-hood.People build BIG BALLS OF MUD because they work. In many domains, they are the only things that have been shown to work. Indeed, they work where loftier approaches have yet to demonstrate that they can compete." from http://www.laputan.org/mud/mud.html#Conclusion- The author quotes (w/o references):"As Donald Knuth so eloquently stated, "Premature optimization is the root of all evil (or at least most of it) in programming."Although one can argue that duplicate code, test goals, and such was what Knuth was speaking about, if one looks at his paper from where the quote comes, it is more in the context of performance algorithm-wise. The paper can be found here and the quote is found on p.268 : http://web.archive.org/web/20130731202547/http://pplab.snu.ac.kr/courses/adv_pl05/papers/p261-knuth.pdfAdditionally: http://joeduffyblog.com/2010/09/06/the-premature-optimization-is-evil-myth/So, from this you can see I have issues regarding various 'detail's, the use of Ruby when Java has the market share, spending a large amount of the book's volume on stuff that does not get to the main point of the book supposedly (see book title). Much of the design practices he speaks can be used with any test tool - not just Selenium. Also, many test code developers like to take advantage of many good blogs, Youtube videos, and seminars - so maybe a book is not the best format for the book's topic in this day and age.
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