Today I Learned

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Slow Down, Sinatra

Right now we’re using Sinatra to mock an API. An important consideration for our frontend experience: what happens when the API takes a long time to respond? How do the pages look when they are waiting on a slow, or absent, server?

Sinatra’s support of before blocks allow us to gauge this:

before do
  sleep(3)
end

get 'some/endpoint' do
  200
end

get 'some/other/endpoint' do
  404
end

With this block, every mocked endpoint will wait three seconds before responding, giving us plenty of time to consider what, in development, would otherwise be an instantaneous delay.

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