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133 lines
5.2 KiB
133 lines
5.2 KiB
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<a href="https://blog.juliobiason.me"><h1>Julio Biason .Me 4.3</h1></a> |
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<p class="lead">Old school dev living in a 2.0 dev world</p> |
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<li class="sidebar-nav-item"><a href="/">English</a></li> |
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<h1 class="post-title">Things I Learnt The Hard Way - Gherkin Is Your Friend to Understand Expectations</h1> |
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<span class="post-date"> |
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2019-06-19 |
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<a href="https://blog.juliobiason.me/tags/book/">#book</a> |
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<a href="https://blog.juliobiason.me/tags/things-i-learnt/">#things i learnt</a> |
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<a href="https://blog.juliobiason.me/tags/gherkin/">#gherkin</a> |
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<a href="https://blog.juliobiason.me/tags/expectations/">#expectations</a> |
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<p>Gherkin is file format for writing behaviour tests (BDD). But it can also give |
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you some insights on what you should do.</p> |
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<span id="continue-reading"></span> |
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<p>Alright, let's talk a bit about Gherkin:</p> |
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<p><a href="https://en.wikipedia.org/wiki/Cucumber_(software)#Gherkin_language">Gherkin</a> |
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is a file format created for <a href="https://en.wikipedia.org/wiki/Cucumber_(software)">Cucumber</a>, |
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which describes scenarios, what's in them, what actions the user/system will |
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do and what's expected after those actions, in a very high level, allowing |
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people without programming experience can describe what's expected from the |
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system.</p> |
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<p>Although Gherkin was born with Cucumber, it is now supported by a bunch of |
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programming languages, through external libraries.</p> |
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<p>A typical Gherkin file may look something like this:</p> |
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<ul> |
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<li><strong>Given that</strong> <em>initial system environment</em></li> |
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<li><strong>When</strong> <em>action performed by the user or some external system</em></li> |
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<li><strong>Then</strong> <em>expected system environment</em></li> |
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</ul> |
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<p>Or, in a more concrete example:</p> |
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<ul> |
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<li><strong>Given that</strong> The system is retrieving all tweets liked by the user</li> |
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<li><strong>When</strong> It finds a tweet with an attachment</li> |
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<li><strong>Then</strong> The attachment should be saved along the tweet text</li> |
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</ul> |
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<p>Pretty simple, right?</p> |
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<p>Now, why I'm mentioning this?</p> |
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<p>Sometimes, specs are not the most clear source of information about what it is |
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expected from the system, and up can't think of <a href="/books/things-i-learnt/steps-as-comments">steps to do |
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so</a>. If you're confused about what |
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you should write, asking the person responsible for the request to write |
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something like Gherkin may give you some better insights about it.</p> |
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<p>Obviously, it won't be complete. People tend to forget the error situations -- |
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like filling the name field with numbers, using characters in age fields, |
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tweets with no text and just attachments -- but at least with a Gherkin |
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description of the system, you can get a better picture of the whole.</p> |
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<p>Also, you may not like to write specs. That's alright, you can replace them |
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with Gherkin anyway.</p> |
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<div style="float:left"> |
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<< <a href="/books/things-i-learnt/steps-as-comments">Write Steps as Comments</a> |
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<div style="float:right"> |
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<a href="/books/things-i-learnt/patterns-not-solutions">Design Patters Are Used to Name Solution, Not Find Them</a> >> |
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