97 lines
2.4 KiB
Ruby
97 lines
2.4 KiB
Ruby
# frozen_string_literal: true
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require 'spec_helper'
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RSpec.describe Gitlab::Cache::Metrics do
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subject(:metrics) { described_class.new(metadata) }
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let(:metadata) do
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Gitlab::Cache::Metadata.new(
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cache_identifier: cache_identifier,
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feature_category: feature_category,
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backing_resource: backing_resource
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)
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end
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let(:cache_identifier) { 'ApplicationController#show' }
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let(:feature_category) { :source_code_management }
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let(:backing_resource) { :unknown }
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let(:counter_mock) { instance_double(Prometheus::Client::Counter) }
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before do
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allow(Gitlab::Metrics).to receive(:counter)
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.with(
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:redis_hit_miss_operations_total,
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'Hit/miss Redis cache counter'
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).and_return(counter_mock)
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end
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describe '#increment_cache_hit' do
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subject { metrics.increment_cache_hit }
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it 'increments number of hits' do
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expect(counter_mock)
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.to receive(:increment)
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.with(
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{
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cache_identifier: cache_identifier,
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feature_category: feature_category,
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backing_resource: backing_resource,
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cache_hit: true
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}
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).once
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subject
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end
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end
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describe '#increment_cache_miss' do
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subject { metrics.increment_cache_miss }
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it 'increments number of misses' do
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expect(counter_mock)
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.to receive(:increment)
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.with(
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{
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cache_identifier: cache_identifier,
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feature_category: feature_category,
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backing_resource: backing_resource,
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cache_hit: false
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}
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).once
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subject
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end
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end
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describe '#observe_cache_generation' do
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subject do
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metrics.observe_cache_generation { action }
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end
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let(:action) { 'action' }
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let(:histogram_mock) { instance_double(Prometheus::Client::Histogram) }
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before do
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allow(Gitlab::Metrics::System).to receive(:monotonic_time).and_return(100.0, 500.0)
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end
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it 'updates histogram metric' do
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expect(Gitlab::Metrics).to receive(:histogram).with(
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:redis_cache_generation_duration_seconds,
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'Duration of Redis cache generation',
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{
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cache_identifier: cache_identifier,
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feature_category: feature_category,
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backing_resource: backing_resource
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},
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[0, 1, 5]
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).and_return(histogram_mock)
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expect(histogram_mock).to receive(:observe).with({}, 400.0)
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is_expected.to eq(action)
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end
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end
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end
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