Instant Cucumber BDD How-to by Wayne Ye

By Wayne Ye

A brief and fast advisor to studying behavior-driven software program improvement with Cucumber

Overview

  • Learn anything new straight away! a brief, speedy, centred consultant providing speedy results.
  • A step by step technique of constructing a true undertaking in a BDD-style utilizing Cucumber
  • Pro suggestions for writing Cucumber positive factors and steps
  • Introduces a few well known and priceless third-party gem stones used with Cucumber

In Detail

Cucumber is a habit pushed layout framework, which permits a developer to jot down specification checks which then exams that this system works because it may still. it's a various improvement paradigm, because it contains writing what this system should still do first, then you definately improve till it passes the tests.

Instant Cucumber BDD How-to will disguise fundamentals of Cucumber in a Behaviour pushed improvement (BDD) variety and clarify the essence of Cucumber, describe the best way to write Cucumber good points to force improvement in a true undertaking, and in addition describe many professional information for writing solid Cucumber beneficial properties and steps. Cucumber is a really enjoyable and funky instrument for writing automatic reputation assessments to aid software program improvement in a Behaviour pushed improvement (BDD) style.

Instant Cucumber BDD How-to will spotlight Cucumber's important position in a improvement strategy known as Behaviour pushed improvement (BDD), describe the right way to write Cucumber positive factors to force improvement in a true undertaking, and at last introduce a few recognized third-party libraries used inline with Cucumber.

It will make it easier to perform the entire projects linked to BDD utilizing Cucumber and write simple Cucumber steps. it's going to help you in utilizing seasoned suggestions for writing expressive Gherkin and enforce directions for writing DRY steps. you are going to the way to use Cucumber's Gherkin to explain the habit consumers wish from the approach in a undeniable language.

What you are going to examine from this book

  • Understand crucial thoughts of TDD and BDD
  • Write uncomplicated Cucumber steps and get it running
  • Learn uncomplicated wisdom of writing Cucumber tests
  • Create behavior-driven actual initiatives utilizing Cucumber
  • Use professional assistance for writing expressive Gherkin
  • Implement guidance for writing DRY steps
  • Explore a few well known and precious third-party gemstones used with Cucumber

Approach

Filled with sensible, step by step directions and transparent motives for crucial and necessary projects. This usual How-to advisor explains the essence of Cucumber, describing the best way to write Cucumber beneficial properties to force improvement in a true venture, and likewise describe many professional counsel for writing solid Cucumber positive aspects and steps.

Who this publication is written for

Instant Cucumber BDD How-to is excellent for an Agile software program improvement staff that desires to undertake a behaviour-driven approach utilizing Cucumber. It assumes that the staff is passionate in decreasing communique gaps among builders and product managers, making sure the advance is usually on track and consistently all for minimal marketable value.

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Additional info for Instant Cucumber BDD How-to

Sample text

Be organized All the preceding tips are targeted at writing maintainable and DRY Cucumber steps. The last tip is to keep Cucumber steps organized, which is kind of a "soft" skill, even though it might be the most important! Categorizing features and step definition files, using tags or hooks, using Rake tasks to encapsulate common running features, and so on; these "rules" are unobtrusive but really important to keep the Cucumber tests maintainable and make daily BDD development life easier. Using third-party libraries with Cucumber (Intermediate) This recipe will introduce a number of awesome third-party libraries used in line with Cucumber; each of them dominates a specific field, and all of them are widely used.

We cannot match them through flexible pluralization, and for these scenarios we need to adopt non-capturing groups, because Cucumber's step statements are eventually treated as regular expressions: When there is 1 person in the meeting room When there are 8 people in the meeting room 45 Instant Cucumber BDD How-to 2. to_i end 3. : before a normal group, the step will try to match one occurrence of the given word and will not pass the matched value into arguments. Non-capturing groups ensure Gherkin's good readability when dealing with singulars and plurals, and in a DRY manner since one generic step matches various kinds of styles.

We can add a block of Ruby code before/around/after a specific tag. This is massively useful, for example, because we can implement login logic before all features/scenarios marked with a @require_login tag: Before('@require_login') do # Put login logic here end After('@require_login') do # Perform logout logic end When we run the @require_login tag, the login logic hook will be executed automatically. Here it just demonstrates the tagged hooks. There are also scenario hooks, step hooks, and global hooks.

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