Functional Programming: A PragPub Anthology

Controlling Setup Repetition with Nested Contexts

When you’re working with a bare-bones testing framework like ExUnit, you’ll experience significant repetition when you set up code. Consider this testing script:

      ...

setup context do
  set_up_web_app
end

test "index, logged in" do
  user = new_user context
  log_in user

  response = get("/")
  assert response.code == 200
  assert response.template == "index"
end

test "profile, logged in" do
  user = new_user context
  log_in user

  response = get("/#{user.id}")
  assert response.code == 200
  assert response.template == "profile"
end

test "profile, logged out" do
  response = get("/")
  assert response.code == 404
end ...