Route Recognition

# spec/web/routes_spec.rb
RSpec.describe Web.routes do
  # ...
  it 'recognizes "GET /"' do
    env   = Rack::MockRequest.env_for('/')
    route = described_class.recognize(env)
    expect(route.path).to   eq('/')
    expect(route.verb).to   eq('GET')
    expect(route.params).to eq({})
  end
  it 'recognizes "PATCH /books/23"' do
    env   = Rack::MockRequest.env_for('/books/23', method: 'PATCH')
    route = described_class.recognize(env)
    expect(route.routable?).to be(true)
    expect(route.path).to   eq('/books/23')
    expect(route.verb).to   eq('PATCH')
    expect(route.params).to eq(id: '23')
  end
  it 'does not recognize unknown route' do
    env   = Rack::MockRequest.env_for('/foo')
    route = subject.recognize(env)
    expect(route.routable?).to be(false)
  end