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# frozen_string_literal: true
require 'spec_helper'
RSpec.describe Gitlab::Database::BackgroundMigration::HealthStatus::Indicators::WriteAheadLog do
let(:connection) { Gitlab::Database.database_base_models[:main].connection }
around do |example|
Gitlab::Database::SharedModel.using_connection(connection) do
example.run
end
end
describe '#evaluate' do
let(:tables) { [table] }
let(:table) { 'users' }
let(:context) { Gitlab::Database::BackgroundMigration::HealthStatus::Context.new(connection, tables) }
subject(:evaluate) { described_class.new(context).evaluate }
it 'remembers the indicator class' do
expect(evaluate.indicator_class).to eq(described_class)
end
it 'returns NoSignal signal in case the feature flag is disabled' do
stub_feature_flags(batched_migrations_health_status_wal: false)
expect(evaluate).to be_a(Gitlab::Database::BackgroundMigration::HealthStatus::Signals::NotAvailable)
expect(evaluate.reason).to include('indicator disabled')
end
it 'returns NoSignal signal when WAL archive queue can not be calculated' do
expect(connection).to receive(:execute).and_return([{ 'pending_wal_count' => nil }])
expect(evaluate).to be_a(Gitlab::Database::BackgroundMigration::HealthStatus::Signals::NotAvailable)
expect(evaluate.reason).to include('WAL archive queue can not be calculated')
end
it 'uses primary database' do
expect(Gitlab::Database::LoadBalancing::Session.current).to receive(:use_primary).and_yield
evaluate
end
context 'when WAL archive queue size is below the limit' do
it 'returns Normal signal' do
expect(connection).to receive(:execute).and_return([{ 'pending_wal_count' => 1 }])
expect(evaluate).to be_a(Gitlab::Database::BackgroundMigration::HealthStatus::Signals::Normal)
expect(evaluate.reason).to include('WAL archive queue is within limit')
end
end
context 'when WAL archive queue size is above the limit' do
it 'returns Stop signal' do
expect(connection).to receive(:execute).and_return([{ 'pending_wal_count' => 420 }])
expect(evaluate).to be_a(Gitlab::Database::BackgroundMigration::HealthStatus::Signals::Stop)
expect(evaluate.reason).to include('WAL archive queue is too big')
end
end
end
end
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