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What is an 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.
What is unit testing in RSpec?
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.
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.
Should I write unit tests first?
Timely: Unit tests should be written just before the production code that makes the test pass. This is something that you would follow if you were doing TDD (Test Driven Development), but otherwise it might not apply.
What is subject RSpec?
The subject is the object being tested. RSpec has an explicit idea of the subject. It may or may not be defined. If it is, RSpec can call methods on it without referring to it explicitly.
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’s the best way to run RSpec examples?
If you want to run this code for each example (example = test in RSpec) you can use :each instead of :all. If you’re testing different scenarios in your app then it may be helpful to group related tests together. You can do this using a context block in RSpec. It’s possible to disable a test for debugging purposes.
Is it possible to disable a test in RSpec?
If you’re testing different scenarios in your app then it may be helpful to group related tests together. You can do this using a context block in RSpec. It’s possible to disable a test for debugging purposes. All you have to do is to change it to xit for the tests you want to disable.
How does the documentation format work in RSpec?
The documentation format uses your test descriptions to generate the output. RSpec comes with a very handy option to profile your tests. Just by passing the –profile flag you’ll be able to see how long each test takes to run & fix the really slow ones. You have learned how to write tests using the RSpec testing framework.
Which is the best matcher for RSpec in Ruby?
In the case of eq, RSpec uses the == operator (read more about Ruby operators). But there are other matchers you can use. For example, the be_something matcher: Where something is a predicate method (like empty?) that is going to be called on the test results.