Week 8, Day 2 (no class on Monday, no Day 1)

til.txt

Automated Testing (also known as regression testing)

Testing usually has a note that explains what the code does. Can improve the code written. Leads into TDD - Test Driven Development.

Can incorporate Rspec (stands for Ruby specs - we will use this). Doesn't come standard with rails.

<|terminal>
mkdir rspec_exercises

<calculator.rb>
require 'rspec'
...

calculator = Calculator.new

RSpec.describe Calculator do
  describe '#add' do
    # code that tests the add method 
    it 'should return the sum of two numbers' do    # between it and do is a string
      calculator = Calculator.new # must repeat this line to create a new instance of Calculator
      result = calculator.add(1, 4)
      expect(result).to eq(5)         # could also combine these lines to: expect(calculator.add(1,4)).to eq(5)
    end
  end
  
  describe '#subtract' do
    # code that tests the subtract method
  end
end

<|terminal|>
rspec calculator.rb

---> .          
     ^ known as a 'pip', means it passed.