May 2017
Intermediate to advanced
726 pages
15h 38m
English
Content preview from Chef: Powerful Infrastructure AutomationBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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RSpec
RSpec is a framework to test Ruby code that allows you to use a domain-specific language to provide tests, much in the same way Chef provides a domain-specific language to manipulate an infrastructure. Instead of using a DSL to manage systems, RSpec's DSL provides a number of components to express the expectations of code and simulate the execution of portions of the system (also known as mocking).
The following examples in RSpec should give you a high-level idea of what RSpec can do:
# simple expectation it 'should add 2 and 2 together' do x = 2 + 2 expect(x).to eq 4 end # Ensure any instance of Object receives a call to 'foo' # and return a pre-defined value (mocking) it 'verifies that an instance receives :foo' do expect_any_instance_of(Object) ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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