test_spec.rb

describe 'Simple Tests that have nothing to do with the app' do

  it 'can do basic math' do
    expect(4 + 2).to eq 6
  end

  it 'can have negative expectations' do
    expect(1 + 7).not_to eq 9
  end

  describe 'setup' do
    before :each do
      @sum = 1 + 2 + 3 + 4
    end

    it 'has the sum of 10' do
      expect(@sum).to eq 10
    end

    it 'can be multiplied' do
      expect(@sum * 10).to be <= 200
    end
  end

  describe 'memoization' do
    let(:sum) { 1 + 2 + 3 + 4}

    it 'hast the sum of 10' do
      expect(sum).to eq 10
    end

    it 'does not execute sum when not called' do
      expect(nil).to be_nil
    end
  end

  describe 'matchers' do
    it 'can compare things' do
      expect(100).to be >= 90
    end
  end

  describe 'equality' do
    it 'is equal if it has the same values' do
      expect('hello').to eq 'hello'
    end

    it 'is not identical if it has the same values' do
      expect('hello').not_to be 'hello'
    end
  end

  describe 'fancy boolean matchers' do

    class RubyCorn
      def awesome?
        true
      end

      def xzyubt?
        true
      end
    end

    it 'is an awesome rubycorn' do
      expect(RubyCorn.new).to be_awesome
      expect(RubyCorn.new).to be_xzyubt
    end

    it 'reflection' do
      expect(2.even?).to be_truthy
      expect(2.even?).to eq true
      expect(2).to be_even
    end
  end

  describe '===' do
    it 'Tobi knows nothing' do
      input = 'asdhasdash'
      case input
      when 3, 4, 5
        puts 'nummbbbaaa'
      when Integer
        puts 'success'
      else
        puts 'moap moap moap'
      end


    end
  end

end