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require 'spec_helper'
describe Gitlab::Metrics::RackMiddleware do
let(:app) { double(:app) }
let(:middleware) { described_class.new(app) }
let(:env) { { 'REQUEST_METHOD' => 'GET', 'REQUEST_URI' => '/foo' } }
describe '#call' do
before do
expect_any_instance_of(Gitlab::Metrics::Transaction).to receive(:finish)
end
it 'tracks a transaction' do
expect(app).to receive(:call).with(env).and_return('yay')
expect(middleware.call(env)).to eq('yay')
end
it 'tags a transaction with the name and action of a controller' do
klass = double(:klass, name: 'TestController')
controller = double(:controller, class: klass, action_name: 'show')
env['action_controller.instance'] = controller
allow(app).to receive(:call).with(env)
expect(middleware).to receive(:tag_controller).
with(an_instance_of(Gitlab::Metrics::Transaction), env)
middleware.call(env)
end
end
describe '#transaction_from_env' do
let(:transaction) { middleware.transaction_from_env(env) }
it 'returns a Transaction' do
expect(transaction).to be_an_instance_of(Gitlab::Metrics::Transaction)
end
it 'stores the request method and URI in the transaction as values' do
expect(transaction.values[:request_method]).to eq('GET')
expect(transaction.values[:request_uri]).to eq('/foo')
end
end
describe '#tag_controller' do
let(:transaction) { middleware.transaction_from_env(env) }
it 'tags a transaction with the name and action of a controller' do
klass = double(:klass, name: 'TestController')
controller = double(:controller, class: klass, action_name: 'show')
env['action_controller.instance'] = controller
middleware.tag_controller(transaction, env)
expect(transaction.tags[:action]).to eq('TestController#show')
end
end
end