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# frozen_string_literal: true
require 'spec_helper'
RSpec.describe Gitlab::Memory::Reporter, :aggregate_failures, feature_category: :application_performance do
let(:fake_report) do
Class.new do
def name
'fake_report'
end
def active?
true
end
def run(writer)
writer << 'I ran'
end
end
end
let(:logger) { instance_double(::Logger) }
let(:report) { fake_report.new }
after do
FileUtils.rm_rf(reports_path)
end
describe '#run_report', time_travel_to: '2020-02-02 10:30:45 0000' do
let(:report_duration_counter) { instance_double(::Prometheus::Client::Counter) }
let(:file_size) { 1_000_000 }
let(:report_file) { "#{reports_path}/fake_report.2020-02-02.10:30:45:000.worker_1.abc123.gz" }
let(:input) { StringIO.new }
let(:output) { StringIO.new }
before do
allow(SecureRandom).to receive(:uuid).and_return('abc123')
allow(Gitlab::Metrics).to receive(:counter).and_return(report_duration_counter)
allow(report_duration_counter).to receive(:increment)
allow(::Prometheus::PidProvider).to receive(:worker_id).and_return('worker_1')
allow(File).to receive(:size).with(report_file).and_return(file_size)
allow(logger).to receive(:info)
stub_gzip
end
shared_examples 'runs and stores reports' do
it 'runs the given report and returns true' do
expect(reporter.run_report(report)).to be(true)
expect(output.string).to eq('I ran')
end
it 'closes read and write streams' do
expect(input).to receive(:close).ordered.at_least(:once)
expect(output).to receive(:close).ordered.at_least(:once)
reporter.run_report(report)
end
it 'logs start and finish event' do
expect(logger).to receive(:info).ordered.with(
hash_including(
message: 'started',
pid: Process.pid,
worker_id: 'worker_1',
perf_report_worker_uuid: 'abc123',
perf_report: 'fake_report'
))
expect(logger).to receive(:info).ordered.with(
hash_including(
:duration_s,
:cpu_s,
perf_report_file: report_file,
perf_report_size_bytes: file_size,
message: 'finished',
pid: Process.pid,
worker_id: 'worker_1',
perf_report_worker_uuid: 'abc123',
perf_report: 'fake_report'
))
reporter.run_report(report)
end
it 'increments Prometheus duration counter' do
expect(report_duration_counter).to receive(:increment).with({ report: 'fake_report' }, an_instance_of(Float))
reporter.run_report(report)
end
context 'when the report returns invalid file path' do
before do
allow(File).to receive(:size).with(report_file).and_raise(Errno::ENOENT)
end
it 'logs `0` as `perf_report_size_bytes`' do
expect(logger).to receive(:info).ordered.with(
hash_including(message: 'started')
)
expect(logger).to receive(:info).ordered.with(
hash_including(message: 'finished', perf_report_size_bytes: 0)
)
reporter.run_report(report)
end
end
context 'when an error occurs' do
before do
allow(report).to receive(:run).and_raise(RuntimeError.new('report failed'))
end
it 'logs the error and returns false' do
expect(logger).to receive(:info).ordered.with(hash_including(message: 'started'))
expect(logger).to receive(:error).ordered.with(
hash_including(
message: 'failed', error: '#<RuntimeError: report failed>'
))
expect(reporter.run_report(report)).to be(false)
end
it 'closes read and write streams' do
allow(logger).to receive(:info)
allow(logger).to receive(:error)
expect(input).to receive(:close).ordered.at_least(:once)
expect(output).to receive(:close).ordered.at_least(:once)
reporter.run_report(report)
end
context 'when compression process is still running' do
it 'terminates the process' do
allow(logger).to receive(:info)
allow(logger).to receive(:error)
expect(Gitlab::ProcessManagement).to receive(:signal).with(an_instance_of(Integer), :KILL)
reporter.run_report(report)
end
end
end
context 'when a report is disabled' do
it 'does nothing and returns false' do
expect(report).to receive(:active?).and_return(false)
expect(report).not_to receive(:run)
expect(logger).not_to receive(:info)
expect(report_duration_counter).not_to receive(:increment)
reporter.run_report(report)
end
end
end
context 'when reports path is specified directly' do
let(:reports_path) { Dir.mktmpdir }
subject(:reporter) { described_class.new(reports_path: reports_path, logger: logger) }
it_behaves_like 'runs and stores reports'
end
context 'when reports path is specified via environment' do
let(:reports_path) { Dir.mktmpdir }
subject(:reporter) { described_class.new(logger: logger) }
before do
stub_env('GITLAB_DIAGNOSTIC_REPORTS_PATH', reports_path)
end
it_behaves_like 'runs and stores reports'
end
context 'when reports path is not specified' do
let(:reports_path) { reporter.reports_path }
subject(:reporter) { described_class.new(logger: logger) }
it 'defaults to a temporary location' do
expect(reports_path).not_to be_empty
end
it_behaves_like 'runs and stores reports'
end
end
# We need to stub out the call into gzip. We do this by intercepting the write
# end of the pipe and replacing it with a StringIO instead, which we can
# easily inspect for contents.
def stub_gzip
pid = 42
allow(IO).to receive(:pipe).and_return([input, output])
allow(Process).to receive(:spawn).with(
"gzip", "--fast", in: input, out: an_instance_of(File), err: an_instance_of(IO)
).and_return(pid)
allow(Process).to receive(:waitpid).with(pid)
end
end
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