Questions and answers

What is expect in RSpec?

What is expect in RSpec?

The basic structure of an rspec expectation is: expect(actual).to matcher(expected) expect(actual).not_to matcher(expected) Note: You can also use expect(..). to_not instead of expect(..). not_to . One is an alias to the other, so you can use whichever reads better to you.

What is example in RSpec?

The word it is another RSpec keyword which is used to define an “Example”. An example is basically a test or a test case. Again, like describe and context, it accepts both class name and string arguments and should be used with a block argument, designated with do/end.

Should I use RSpec?

RSpec is way more powerful because it’s far easier to both read and write tests in. It’s also very elegant when using mocks and stubs, a concept which will become extremely useful once you start using them in your tests.

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 run a specific RSpec test?

RSpec can take a file name or directory name and run the file or the contents of the directory. So you can do: rspec spec/jobs to run the tests found in the jobs directory. rspec spec/jobs spec/services to run only tests found in the jobs and services directory.

What is RSpec used for?

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 start RSpec?

Getting Started With RSpec You need to require the rspec gem. Then you need to create a describe block to group all your tests together & to tell RSpec which class you are testing. This is the test name, plus a way to group together all the components of the test itself.

Do not use should when describing your tests?

Don’t use should Do not use should when describing your tests. Use the third person in the present tense. Even better start using the new expectation syntax. See the should_not gem for a way to enforce this in RSpec and the should_clean gem for a way to clean up existing RSpec examples that begin with ‘should.

How do I run an RSpec test?

Running tests by their file or directory names is the most familiar way to run tests with RSpec. RSpec can take a file name or directory name and run the file or the contents of the directory. So you can do: rspec spec/jobs to run the tests found in the jobs directory.

Is RSpec a framework?

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.

How do I run all RSpec?

  1. Create a .rspec file in the root of your project.
  2. Add the path to where your specs are e.g. –default-path test/spec/
  3. Add the pattern of how your files are named e.g. –pattern ****/*.spec.
  4. Run rspec and it should pick all your specs and run them 🙂

What do you need to know about RSpec controller?

RSpec gives us helpers for simulating requests, attributes for accessing values that are being assembled by the controller, and additional matchers for setting expectations on responses.

How to avoid a false positive in RSpec?

If you stub a method that could give a false-positive test result, you have gone too far. Always use Timecop instead of stubbing anything on Time or Date. Stub HTTP requests when the code is making them. Avoid hitting real external services. Use webmock and VCR separately or together.

How are request specs different from controller specs?

“The official recommendation of the Rails team and the RSpec core team is to write request specs instead. Request specs allow you to focus on a single controller action, but unlike controller tests involve the router, the middleware stack, and both rack requests and responses.

What are the four attributes of RSpec-Rails?

RSpec-Rails gives us four attributes that grant us access to hashes containing these values. This allows us to inspect them and to write expectations about what values they should contain. Below are the four attributes: assigns: a hash of instance variables, assigned in the action that is available to the view.