The document discusses the Minitest testing framework for Ruby. It provides an overview of Minitest, compares it to RSpec, describes its main assertions and syntax, reasons for using Minitest including that it is faster and part of Ruby/Rails, how to integrate it into Rails projects, and how Bankfacil uses it for their auto financing project.

1. Minitest
Raphael Monteiro
Bankfacil
18/02/2015

2. Summary
● What is Minitest?
● Minitest vs Rspec
● Main assertions (syntax)
● Reasons to use Minitest
● Minitest into Rails
● Minitest into Bankfacil
● Further...

3. What is Minitest?
Minitest provides a complete suite of testing
facilities.
● minitest/unit
● minitest/spec
● minitest/benchmark
● minitest/mock
● minitest/pride

4. Minitest vs Rspec
● "rspec is a testing DSL. minitest is ruby." - Adam
Hawkins, "Bow Before Minitest"
● "Rspec is not about testing - it's about
documentation. That's why I prefer it" - Rahoul
Baruah

5. Main assertions (syntax)
● stub e mock
test 'execute' do
mock = Minitest::Mock.new
LeadToBkfApplicationCreator.stub(:new, mock,
lead_icarros) do
mock.expect(:create, true)
@ruler.execute(lead_icarros)
end
assert mock.verify
end
● more ex:

6. Reasons to use minitest
● Faster and lighter than Rspec
● It is Ruby, no magic
● Random & parallel tests
● It is part of Ruby and Rails

7. Minitest into Rails
● Since version 1.9, Ruby provides Minitest
● test folder
● setup and teardown methods
● fixtures
# lo & behold! I am a YAML comment!
david:
name: David Heinemeier Hansson
birthday: 1979-10-15
profession: Systems development
● rake test

8. Minitest into Bankfacil
● auto_financing project
● assertions not spec
● minitest-focus
● minitest-reporters
class MyTest < MiniTest::Unit::TestCase
def test_unrelated; ...; end
focus
def test_method; ...; end # only
this one will run
def test_method_edgecase; ...; end
end

9. Further...
● Official website: https://github.com/seattlerb/minitest
● Ruby on Rails guides: http://guides.rubyonrails.org/v3.2.13/testing.html
● Bow Before Minitest by Adam Hawkins: https://speakerdeck.
com/ahawkins/bow-before-minitest
● RubyInside: http://www.rubyinside.com/dhh-offended-by-rspec-debate-4610.
html
● Minitest Quick Reference: http://www.mattsears.
com/articles/2011/12/10/minitest-quick-reference
● 7 Reasons I’m sticking with minitest: http://brandonhilkert.com/blog/7-reasons-
why-im-sticking-with-minitest-and-fixtures-in-rails/
● 7 Reasons I love minitest: https://blog.engineyard.com/2014/seven-reasons-i-
love-minitest