What does bundle exec Rspec do? Description. 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 does bundle command do?
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How to configure RSpec as a dependency via bundler?
Let’s start a new Ruby project where we’ll configure RSpec as a dependency via Bundler. Create a new directory and put the following code in your Gemfile: Open your project’s directory in your terminal, and type bundle install --path .bundle to install the latest version of RSpec and all related dependencies.
What is the use of describe block in RSpec?
With RSpec, we are always describing the behavior of classes, modules and their methods. The describe block is always used at the top to put specs in a context. It can accept either a class name, in which case the class needs to exist, or any string you’d like.
What is the difference between semaphore and RSpec?
Marko Anastasov is a software engineer, author, and co-founder of Semaphore. He worked on building and scaling Semaphore from an idea to a cloud-based platform used by some of the world’s engineering teams. RSpec is a testing tool for Ruby, created for behavior-driven development (BDD).
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What is bundle exec do?
bundle exec makes a number of changes to the shell environment, then executes the command you specify in full. It also modifies Rubygems: disallow loading additional gems not in the bundle. modify the gem method to be a no-op if a gem matching the requirements is in the bundle, and to raise a Gem::LoadError if it's not.
What is bundle exec in Ruby?
bundle exec is a Bundler command to execute a script in the context of the current bundle (the one from your directory's Gemfile). rake db:migrate is the script where db is the namespace and migrate is the task name defined.
What is a gemlock file?
The Gemfile. lock allows you to specify the versions of the dependencies that your application needs in the Gemfile , while remembering all of the exact versions of third-party code that your application used when it last worked correctly. By specifying looser dependencies in your Gemfile (such as nokogiri ~> 1.4.
What is bundle install?
bundle install is a command we use to install the dependencies specified in your Gemfile.
How do I run a bundle in Ruby?
Setting up BundlerOpen a terminal window and run the following command: ... Navigate to your project root directory.Install all of the required gems from your specified sources: ... Inside your app, load up the bundled environment: ... Run an executable that comes with a gem in your bundle:More items...•
What is difference between rake and rails?
Rake is a popular task runner for Ruby and Rails applications. For example, Rails provides the predefined Rake tasks for creating databases, running migrations, and performing tests. You can also create custom tasks to automate specific actions - run code analysis tools, backup databases, and so on.
Is it safe to remove Gemfile lock?
It is recommended to keep the Gemfile. lock . Gemfile. lock keeps track of all inter gem dependency, and has exact gem versions to be used.
Where is my Gemfile?
Gemfile is a file which must be located in root of your rails project. It is used for describing gem dependencies for Ruby programs. The first thing in your gemfile is a source in which you tell the Gemfile where to look for gems. Source can be called as a block and you can have multiple sources in your gemfile.
What can you do with Gemfile?
Your gemfile is a list of all gems that you want to include in the project. It is used with bundler (also a gem) to install, update, remove and otherwise manage your used gems. These gems belong to development environment and the test environment since they are for testing the application.
Is bundle the same as bundle install?
The commands bundle & bundle install also have the same functionality. bundle uses Thor, and bundle 's default task is install . Also, bundle i does the same thing as bundle install because bundle 's task i is mapped (aliased) to install .
How do I run a bundle in Rails?
How to use Bundler with RailsAdd new dependencies to your Gemfile as you need them. gem 'nokogiri' gem 'geokit'If you want a dependency to be loaded only in a certain Rails environment, place it in a group named after that Rails environment. ... You can place a dependency in multiple groups at once as well.
What is a bundler in JavaScript?
A bundler is a development tool that combines many JavaScript code files into a single one that is production-ready loadable in the browser. A fantastic feature of a bundler is that it generates a dependency graph as it traverses your first code files.
What is Rakefile in Ruby?
Rake is a tool you can use with Ruby projects. It allows you to use ruby code to define "tasks" that can be run in the command line. Rake can be downloaded and included in ruby projects as a ruby gem. Once installed, you define tasks in a file named "Rakefile" that you add to your project.
What is Binstubs?
Binstubs are scripts that wrap around executables. Bundler creates a small Ruby file (a binstub) that loads Bundler, runs the command, and puts it into bin/ . Binstubs are a shortcut-or alternative- to always using bundle exec .
How do I install bundles to install missing gems?
Select Tools | Bundler | Install from the main menu. Open the Gemfile, place the caret at any highlighted gem missing in the project SDK and press Alt+Enter . Select Install missing gems using 'bundler' and press Enter .
How do I run a rake task?
Go to Websites & Domains and click Ruby. After gems installation you can try to run a Rake task by clicking Run rake task. In the opened dialog, you can provide some parameters and click OK - this will be equivalent to running the rake utility with the specified parameters in the command line.
What is RSpec in Ruby?
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.
Where are RSpec tests stored?
By convention, tests written with RSpec are called “specs” (short for “specifications”) and are stored in the project’s spec directory. Create that directory in your project too:
What tool do you need for a BDD cycle?
It is worth noting that for a full BDD cycle we would need a tool such as Cucumber to write an outside-in scenario in human language. This also acts as a very high level integration test, making sure the application works as expected from the user’s perspective.
Is there more to RSpec?
There is definitely more to RSpec though, and that is a topic of the next tutorial in this series.
