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require 'spec_helper'
describe Gitlab::Metrics::WebTransaction do
let(:env) { {} }
let(:transaction) { described_class.new(env) }
describe '#duration' do
it 'returns the duration of a transaction in seconds' do
transaction.run { sleep(0.5) }
expect(transaction.duration).to be >= 0.5
end
end
describe '#allocated_memory' do
it 'returns the allocated memory in bytes' do
transaction.run { 'a' * 32 }
expect(transaction.allocated_memory).to be_a_kind_of(Numeric)
end
end
describe '#run' do
it 'yields the supplied block' do
expect { |b| transaction.run(&b) }.to yield_control
end
it 'stores the transaction in the current thread' do
transaction.run do
expect(Thread.current[described_class::THREAD_KEY]).to eq(transaction)
end
end
it 'removes the transaction from the current thread upon completion' do
transaction.run { }
expect(Thread.current[described_class::THREAD_KEY]).to be_nil
end
end
describe '#add_metric' do
it 'adds a metric to the transaction' do
expect(Gitlab::Metrics::Metric).to receive(:new)
.with('rails_foo', { number: 10 }, {})
transaction.add_metric('foo', number: 10)
end
end
describe '#method_call_for' do
it 'returns a MethodCall' do
method = transaction.method_call_for('Foo#bar', :Foo, '#bar')
expect(method).to be_an_instance_of(Gitlab::Metrics::MethodCall)
end
end
describe '#increment' do
it 'increments a counter' do
transaction.increment(:time, 1)
transaction.increment(:time, 2)
values = { duration: 0.0, time: 3, allocated_memory: a_kind_of(Numeric) }
expect(transaction).to receive(:add_metric)
.with('transactions', values, {})
transaction.track_self
end
end
describe '#set' do
it 'sets a value' do
transaction.set(:number, 10)
values = {
duration: 0.0,
number: 10,
allocated_memory: a_kind_of(Numeric)
}
expect(transaction).to receive(:add_metric)
.with('transactions', values, {})
transaction.track_self
end
end
describe '#finish' do
it 'tracks the transaction details and submits them to Sidekiq' do
expect(transaction).to receive(:track_self)
expect(transaction).to receive(:submit)
transaction.finish
end
end
describe '#track_self' do
it 'adds a metric for the transaction itself' do
values = {
duration: transaction.duration,
allocated_memory: a_kind_of(Numeric)
}
expect(transaction).to receive(:add_metric)
.with('transactions', values, {})
transaction.track_self
end
end
describe '#submit' do
it 'submits the metrics to Sidekiq' do
transaction.track_self
expect(Gitlab::Metrics).to receive(:submit_metrics)
.with([an_instance_of(Hash)])
transaction.submit
end
it 'adds the action as a tag for every metric' do
allow(transaction).to receive(:labels).and_return(controller: 'Foo', action: 'bar')
transaction.track_self
hash = {
series: 'rails_transactions',
tags: { action: 'Foo#bar' },
values: { duration: 0.0, allocated_memory: a_kind_of(Numeric) },
timestamp: a_kind_of(Integer)
}
expect(Gitlab::Metrics).to receive(:submit_metrics)
.with([hash])
transaction.submit
end
it 'does not add an action tag for events' do
allow(transaction).to receive(:labels).and_return(controller: 'Foo', action: 'bar')
transaction.add_event(:meow)
hash = {
series: 'events',
tags: { event: :meow },
values: { count: 1 },
timestamp: a_kind_of(Integer)
}
expect(Gitlab::Metrics).to receive(:submit_metrics)
.with([hash])
transaction.submit
end
end
describe '#labels' do
context 'when request goes to Grape endpoint' do
before do
route = double(:route, request_method: 'GET', path: '/:version/projects/:id/archive(.:format)')
endpoint = double(:endpoint, route: route)
env['api.endpoint'] = endpoint
end
it 'provides labels with the method and path of the route in the grape endpoint' do
expect(transaction.labels).to eq({ controller: 'Grape', action: 'GET /projects/:id/archive' })
expect(transaction.action).to eq('Grape#GET /projects/:id/archive')
end
it 'does not provide labels if route infos are missing' do
endpoint = double(:endpoint)
allow(endpoint).to receive(:route).and_raise
env['api.endpoint'] = endpoint
expect(transaction.labels).to eq({})
expect(transaction.action).to be_nil
end
end
context 'when request goes to ActionController' do
let(:request) { double(:request, format: double(:format, ref: :html)) }
before do
klass = double(:klass, name: 'TestController')
controller = double(:controller, class: klass, action_name: 'show', request: request)
env['action_controller.instance'] = controller
end
it 'tags a transaction with the name and action of a controller' do
expect(transaction.labels).to eq({ controller: 'TestController', action: 'show' })
expect(transaction.action).to eq('TestController#show')
end
context 'when the response content type is not :html' do
let(:request) { double(:request, format: double(:format, ref: :json)) }
it 'appends the mime type to the transaction action' do
expect(transaction.labels).to eq({ controller: 'TestController', action: 'show.json' })
expect(transaction.action).to eq('TestController#show.json')
end
end
end
it 'returns no labels when no route information is present in env' do
expect(transaction.labels).to eq({})
expect(transaction.action).to eq(nil)
end
end
describe '#add_event' do
it 'adds a metric' do
transaction.add_event(:meow)
expect(transaction.metrics[0]).to be_an_instance_of(Gitlab::Metrics::Metric)
end
it "does not prefix the metric's series name" do
transaction.add_event(:meow)
metric = transaction.metrics[0]
expect(metric.series).to eq(described_class::EVENT_SERIES)
end
it 'tracks a counter for every event' do
transaction.add_event(:meow)
metric = transaction.metrics[0]
expect(metric.values).to eq(count: 1)
end
it 'tracks the event name' do
transaction.add_event(:meow)
metric = transaction.metrics[0]
expect(metric.tags).to eq(event: :meow)
end
it 'allows tracking of custom tags' do
transaction.add_event(:meow, animal: 'cat')
metric = transaction.metrics[0]
expect(metric.tags).to eq(event: :meow, animal: 'cat')
end
end
end
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