Rspec

gistfile1.md

#Rspec

passing tests
important to understand what the test is asking
refer to spec
refer to helpers.rb

describe - example group
context - scenario
it - example
expect - the test

model spec

RSpec.describe CardDeck, :type => :model do  

describe "#shuffle" do
  it "returns a shuffled array of cards" do
    expect(@card_deck.shuffle).to be_an Array
    shuffled_cards = @card_deck.shuffle.map(&:face)
    expect(shuffled_cards).to match_array sorted_cards
    expect(shuffled_cards).not_to eq sorted_cards
  end
  it "permanently updates the order of cards in @cards" do
    shuffled_cards = @card_deck.shuffle.map(&:face)
    expect(@card_deck.cards.map(&:face)).to eq shuffled_cards
  end
end  

before

let

subject
Use subject in the group scope to explicitly define the value that is returned by the subject method in the example scope.