52 lines
1.5 KiB
Ruby
52 lines
1.5 KiB
Ruby
# frozen_string_literal: true
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require 'spec_helper'
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RSpec.describe Gitlab::Metrics::Samplers::DatabaseSampler do
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subject { described_class.new }
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it_behaves_like 'metrics sampler', 'DATABASE_SAMPLER'
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describe '#sample' do
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before do
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described_class::METRIC_DESCRIPTIONS.each_key do |metric|
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allow(subject.metrics[metric]).to receive(:set)
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end
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end
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context 'for ActiveRecord::Base' do
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let(:labels) do
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{
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class: 'ActiveRecord::Base',
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host: Gitlab::Database.config['host'],
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port: Gitlab::Database.config['port']
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}
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end
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context 'when the database is connected' do
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it 'samples connection pool statistics' do
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expect(subject.metrics[:size]).to receive(:set).with(labels, a_value >= 1)
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expect(subject.metrics[:connections]).to receive(:set).with(labels, a_value >= 1)
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expect(subject.metrics[:busy]).to receive(:set).with(labels, a_value >= 1)
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expect(subject.metrics[:dead]).to receive(:set).with(labels, a_value >= 0)
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expect(subject.metrics[:waiting]).to receive(:set).with(labels, a_value >= 0)
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subject.sample
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end
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end
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context 'when the database is not connected' do
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before do
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allow(ActiveRecord::Base).to receive(:connected?).and_return(false)
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end
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it 'records no samples' do
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expect(subject.metrics[:size]).not_to receive(:set).with(labels, anything)
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subject.sample
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end
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end
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end
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end
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end
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