118 lines
3 KiB
Ruby
118 lines
3 KiB
Ruby
# frozen_string_literal: true
|
|
|
|
require 'spec_helper'
|
|
|
|
RSpec.describe Gitlab::Cache::Metrics do
|
|
subject(:metrics) do
|
|
described_class.new(
|
|
caller_id: caller_id,
|
|
cache_identifier: cache_identifier,
|
|
feature_category: feature_category,
|
|
backing_resource: backing_resource
|
|
)
|
|
end
|
|
|
|
let(:caller_id) { 'caller-id' }
|
|
let(:cache_identifier) { 'ApplicationController#show' }
|
|
let(:feature_category) { :source_code_management }
|
|
let(:backing_resource) { :unknown }
|
|
|
|
let(:counter_mock) { instance_double(Prometheus::Client::Counter) }
|
|
|
|
before do
|
|
allow(Gitlab::Metrics).to receive(:counter)
|
|
.with(
|
|
:redis_hit_miss_operations_total,
|
|
'Hit/miss Redis cache counter'
|
|
).and_return(counter_mock)
|
|
end
|
|
|
|
describe '#initialize' do
|
|
context 'when backing resource is not supported' do
|
|
let(:backing_resource) { 'foo' }
|
|
|
|
it { expect { metrics }.to raise_error(RuntimeError) }
|
|
|
|
context 'when on production' do
|
|
before do
|
|
allow(Gitlab).to receive(:dev_or_test_env?).and_return(false)
|
|
end
|
|
|
|
it 'does not raise an exception' do
|
|
expect { metrics }.not_to raise_error
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
describe '#increment_cache_hit' do
|
|
subject { metrics.increment_cache_hit }
|
|
|
|
it 'increments number of hits' do
|
|
expect(counter_mock)
|
|
.to receive(:increment)
|
|
.with(
|
|
{
|
|
caller_id: caller_id,
|
|
cache_identifier: cache_identifier,
|
|
feature_category: feature_category,
|
|
backing_resource: backing_resource,
|
|
cache_hit: true
|
|
}
|
|
).once
|
|
|
|
subject
|
|
end
|
|
end
|
|
|
|
describe '#increment_cache_miss' do
|
|
subject { metrics.increment_cache_miss }
|
|
|
|
it 'increments number of misses' do
|
|
expect(counter_mock)
|
|
.to receive(:increment)
|
|
.with(
|
|
{
|
|
caller_id: caller_id,
|
|
cache_identifier: cache_identifier,
|
|
feature_category: feature_category,
|
|
backing_resource: backing_resource,
|
|
cache_hit: false
|
|
}
|
|
).once
|
|
|
|
subject
|
|
end
|
|
end
|
|
|
|
describe '#observe_cache_generation' do
|
|
subject do
|
|
metrics.observe_cache_generation { action }
|
|
end
|
|
|
|
let(:action) { 'action' }
|
|
let(:histogram_mock) { instance_double(Prometheus::Client::Histogram) }
|
|
|
|
before do
|
|
allow(Gitlab::Metrics::System).to receive(:monotonic_time).and_return(100.0, 500.0)
|
|
end
|
|
|
|
it 'updates histogram metric' do
|
|
expect(Gitlab::Metrics).to receive(:histogram).with(
|
|
:redis_cache_generation_duration_seconds,
|
|
'Duration of Redis cache generation',
|
|
{
|
|
caller_id: caller_id,
|
|
cache_identifier: cache_identifier,
|
|
feature_category: feature_category,
|
|
backing_resource: backing_resource
|
|
},
|
|
[0, 1, 5]
|
|
).and_return(histogram_mock)
|
|
|
|
expect(histogram_mock).to receive(:observe).with({}, 400.0)
|
|
|
|
is_expected.to eq(action)
|
|
end
|
|
end
|
|
end
|