Add header to Rack::Test request

I couldn’t find any results on the Google for the title of this blog post, so I’m writing it here.

All I wanted to do was to send through a header. I tried this:

it "test" do
  get '/test', {}, { 'Test-Header' => 'Test value' }
  expect(last_response.status).to eq(200)
end

That doesn’t work, because that third argument is actually the Rack env object.

The correct way to do it is this:

it "test" do
  header 'Test-Header', 'Test value'
  get '/test'
  expect(last_response.status).to eq(200)
end

Ryan Bigg