What is RSpec in Ruby on Rails?

RSpec is a computer domain-specific language (DSL) (particular application domain) testing tool written in the programming language Ruby to test Ruby code. It is a behavior-driven development (BDD) framework which is extensively used in production applications.

What is an RSpec example?

The word it is another RSpec keyword which is used to define an “Example”. An example is basically a test or a test case. … This part of the RSpec philosophy, an Example is not just a test, it’s also a specification (a spec). In other words, an Example both documents and tests the expected behavior of your Ruby code.

What is RSpec rails gem?

rspec-rails is a testing framework for Rails 3. x and 4. x.

What is RSpec gem?

A gem is a Ruby library which you can use in your own code. In order to install a gem, you need to use the gem command. … Also, if you are using a Mac or Linux computer, you may need to either run gem install rspec command using sudo or use a tool like HomeBrew or RVM to install the rspec gem.

Is RSpec used for unit testing?

RSpec is a unit test framework for the Ruby programming language. RSpec is different than traditional xUnit frameworks like JUnit because RSpec is a Behavior driven development tool. What this means is that, tests written in RSpec focus on the “behavior” of an application being tested.

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Is RSpec TDD or BDD?

RSpec is a Behavior-Driven Development tool for Ruby programmers. BDD is an approach to software development that combines Test-Driven Development, Domain Driven Design and Acceptance Test-Driven Planning. RSpec helps you do the TDD part of that equation, focusing on the documentation and design aspects of TDD.

What is let in RSpec?

Let variables

Another way to define a variable in RSpec is to use the let syntax. … The let method is passed a block that computes the value of the variable, and the block will be called if the value of the variable is ever needed. In other words, let variables are lazily evaluated.

What is context in Rspec?

According to the rspec source code, “context” is just a alias method of “describe”, meaning that there is no functional difference between these two methods. However, there is a contextual difference that’ll help to make your tests more understandable by using both of them.

How do I set up Rspec?

Setting up Rspec

  1. Step 1 — Delete Any Existing Test Folders. If I’ve generated a new rails app using rails new <app> without using any additional flags, I remove the app/test directory:
  2. Step 2 — Add Gems. …
  3. Step 3 — Run Rspec Generator. …
  4. Step 4 — Configure Rspec. …
  5. Step 5 — Write Tests.

Does rails come with Rspec?

Being somewhat of a Rails noob, based on the handful of projects I’ve worked on so far, had assumed that RSpec was the default test framework that comes with Rails. But it turns out, this is not the case. There’s a few additional steps needed to setup a Rails project to use RSpec.

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What is Rspec used for?

RSpec is a computer domain-specific language (DSL) (particular application domain) testing tool written in the programming language Ruby to test Ruby code. It is a behavior-driven development (BDD) framework which is extensively used in production applications.

What do Rspec tests do?

RSpec is a testing tool for Ruby, created for behavior-driven development (BDD). It is the most frequently used testing library for Ruby in production applications. Even though it has a very rich and powerful DSL (domain-specific language), at its core it is a simple tool which you can start using rather quickly.

How do I know what version of Rspec I have?

Boot up your terminal and punch in gem install rspec to install RSpec. Once that’s done, you can verify your version of RSpec with rspec –version , which will output the current version of each of the packaged gems. Take a minute also to hit rspec –help and look through the various options available. That’s it.

What does bundle exec RSpec do?

This command executes the command, making all gems specified in the Gemfile(5) available to require in Ruby programs. Essentially, if you would normally have run something like rspec spec/my_spec.

What is let in Ruby?

let generates a method whose return value is memoized after the first call. This is known as lazy loading because the value is not loaded into memory until the method is called. … You can use it the same way that you would call a normal Ruby method.