What is a stub in RSpec?
In RSpec, a stub is often called a Method Stub, it’s a special type of method that “stands in” for an existing method, or for a method that doesn’t even exist yet. We know that the Student class needs to provide a name() method and we use allow() to create a method stub for name ().
What is allow in RSpec?
allow makes a stub while expect makes a mock. That is allow allows an object to return X instead of whatever it would return unstubbed, and expect is an allow plus an expectation of some state or event. When you write allow(Foo).to receive(:bar).with(baz).and_return(foobar_result)
Is expected to RSpec?
is_expected is defined simply as expect(subject) and is designed for when you are using rspec-expectations with its newer expect-based syntax. However, it continues to be available and work even if the :should syntax is disabled (since that merely removes Object#should but this is RSpec::Core::ExampleGroup#should ).
How do you stub in Minitest?
Stubbing in Minitest is done by calling . stub on the object/class that you want to stub a method on, with three arguments: the method name, the return value of the stub and a block. The block is basically the scope of the stub, or in other words, the stub will work only in the provided block.
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.
How do I mock an instance variable in RSpec?
You can’t mock an instance variable. You can only mock methods. One option is to define a method inside OneClass that wraps the another_member , and mock that method. However, you don’t have to, there is a better way to write and test your code.
What is subject in RSpec?
232. Summary: RSpec’s subject is a special variable that refers to the object being tested. Expectations can be set on it implicitly, which supports one-line examples. It is clear to the reader in some idiomatic cases, but is otherwise hard to understand and should be avoided.
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.
What are stubs in rails?
Stubs. Stubs are like dummies, except in that they provide canned answers to the methods which are called on them. They return hardcoded information in order to reduce test dependencies and avoid time-consuming operations.
Is allow/expect different from expect in RSpec Mocks 3?
I know that providing/specifying a return value with expectwas the syntax in RSpec mocks 2.13, but as far as I can see, the syntax changed in RSpec mocks 3to use allow. However, in the (passing) sample code below, using either allow/expector just expect/and_returnseems to generate the same result.
What is the most recent version of RSpec?
A lot of the above answers are a bit out of date, so this is a quick summary for a more recent version of RSpec (3.8+). This solution raises no warnings from rubocop-rspec and is inline with rspec best practices:
How to check if a response contains the expected value?
You can examine the response object and verify that it contains the expected value: @expected = { :flashcard => @flashcard, :lesson => @lesson, :success => true }.to_json get :action # replace with action name / params as necessary response.body.should == @expected Changing this to a post makes it a bit trickier.