tea-time/presentation/05_meow_states.slides

!SLIDE
# What if the cat meows differently based on certain states?

!SLIDE image-80-percent
<img src="assets/hungry-cat.jpg" />

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<img src="assets/cat-carrier.jpg" />

!SLIDE
# Nested `describe`

!SLIDE larger
``` coffeescript
describe 'Cat', ->
  describe '#meow', ->
    describe 'hungry', ->
      # Cat#meow expectation for when
      # the cat is hungry

    describe 'going to the vet', ->
      # Cat#meow expectation for when
      # the cat knows it's vet time
```

!SLIDE larger
``` coffeescript
describe 'Cat', ->
  describe '#meow', ->
    describe 'hungry', ->
      it 'should be a mournful meow', ->
        cat = new Cat()
        cat.state = -> Cat.HUNGRY
          # ...just like cat.stubs(:state)

        expect(cat.meow()).toEqual("meeeyaow")

    describe 'going to the vet', ->
      it 'should be an evil meow', ->
        cat = new Cat()
        cat.state = -> Cat.VET_PSYCHIC
          # ...just like the one above

        expect(cat.meow()).toEqual("raowwww")
```

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<img src="assets/wet-cat.jpg" />

!SLIDE even-larger
``` coffeescript
cat = new Cat()
```

!SLIDE even-larger
``` ruby
before do
  @cat = Cat.new
end

it 'should be a mournful meow' do
  @cat.stubs(:state).returns(Cat::HUNGRY)

  @cat.meow.should == "meeyaow"
end
```

!SLIDE even-larger
``` ruby
before -> it -> after
```

!SLIDE even-larger
``` ruby
before do
  @instance_variable = "yes"
end

it "is in same context as before block" do
  @instance_variable.should == "yes"
end
```

!SLIDE even-larger
``` coffeescript
beforeEach -> it -> afterEach
```

!SLIDE even-larger
``` coffeescript
beforeEach ->
  @instanceVariable = "yes"

it "should be in the same context", ->
  expect(@instanceVariable).toEqual("yes")
```

!SLIDE larger
``` coffeescript
describe 'Cat', ->
  describe '#meow', ->
    beforeEach ->
      @cat = new Cat()

    describe 'hungry', ->
      it 'should be a mournful meow', ->
        @cat.state = -> Cat.HUNGRY

        expect(@cat.meow()).toEqual("meeeyaow")

    describe 'going to the vet', ->
      it 'should be an evil meow', ->
        @cat.state = -> Cat.VET_PSYCHIC

        expect(@cat.meow()).toEqual("raowwww")
```