Effective Testing with RSpec 3

Understanding Failure

To try your specs, run the rspec command from your project directory. RSpec will look inside the spec subdirectory for files named «something»_spec.rb and run them:

$ rspec 
F

Failures:

  1) An ideal sandwich is delicious
     Failure/Error: sandwich = Sandwich.new(’delicious’, [])
     
     NameError:
       uninitialized constant Sandwich
     # ./spec/sandwich_spec.rb:4:in ‘block (2 levels) in <top (required)>’

Finished in 0.00076 seconds (files took 0.08517 seconds to load)
1 example, 1 failure

Failed examples:

rspec ./spec/sandwich_spec.rb:3 # An ideal sandwich is delicious

RSpec gives us a detailed report showing which spec failed, the line of code where the error occurred, and a description of the problem. ...