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require 'spec_helper'
describe Gitlab::Metrics::Transaction do
let(:transaction) { described_class.new }
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 '#measure_method' do
it 'adds a new method if it does not exist already' do
transaction.measure_method('Foo#bar') { 'foo' }
expect(transaction.methods['Foo#bar']).
to be_an_instance_of(Gitlab::Metrics::MethodCall)
end
it 'adds timings to an existing method call' do
transaction.measure_method('Foo#bar') { 'foo' }
transaction.measure_method('Foo#bar') { 'foo' }
expect(transaction.methods['Foo#bar'].call_count).to eq(2)
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 '#add_tag' do
it 'adds a tag' do
transaction.add_tag(:foo, 'bar')
expect(transaction.tags).to eq({ foo: 'bar' })
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
transaction.action = 'Foo#bar'
transaction.track_self
hash = {
series: 'rails_transactions',
tags: { action: 'Foo#bar' },
values: { duration: 0.0, allocated_memory: a_kind_of(Numeric) },
timestamp: an_instance_of(Fixnum)
}
expect(Gitlab::Metrics).to receive(:submit_metrics).
with([hash])
transaction.submit
end
end
end
|
