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# frozen_string_literal: true
require 'spec_helper'
RSpec.describe Gitlab::Database::Partitioning do
include Database::PartitioningHelpers
include Database::TableSchemaHelpers
let(:connection) { ApplicationRecord.connection }
around do |example|
previously_registered_models = described_class.registered_models.dup
described_class.instance_variable_set('@registered_models', Set.new)
previously_registered_tables = described_class.registered_tables.dup
described_class.instance_variable_set('@registered_tables', Set.new)
example.run
described_class.instance_variable_set('@registered_models', previously_registered_models)
described_class.instance_variable_set('@registered_tables', previously_registered_tables)
end
describe '.register_models' do
context 'ensure that the registered models have partitioning strategy' do
it 'fails when partitioning_strategy is not specified for the model' do
model = Class.new(ApplicationRecord)
expect { described_class.register_models([model]) }.to raise_error /should have partitioning strategy defined/
end
end
end
describe '.sync_partitions' do
let(:table_names) { %w[partitioning_test1 partitioning_test2] }
let(:models) do
table_names.map do |table_name|
Class.new(ApplicationRecord) do
include PartitionedTable
self.table_name = table_name
partitioned_by :created_at, strategy: :monthly
end
end
end
before do
table_names.each do |table_name|
connection.execute(<<~SQL)
CREATE TABLE #{table_name} (
id serial not null,
created_at timestamptz not null,
PRIMARY KEY (id, created_at))
PARTITION BY RANGE (created_at);
SQL
end
end
it 'manages partitions for each given model' do
expect { described_class.sync_partitions(models)}
.to change { find_partitions(table_names.first).size }.from(0)
.and change { find_partitions(table_names.last).size }.from(0)
end
context 'when no partitioned models are given' do
it 'manages partitions for each registered model' do
described_class.register_models([models.first])
described_class.register_tables([
{
table_name: table_names.last,
partitioned_column: :created_at, strategy: :monthly
}
])
expect { described_class.sync_partitions }
.to change { find_partitions(table_names.first).size }.from(0)
.and change { find_partitions(table_names.last).size }.from(0)
end
end
end
describe '.report_metrics' do
let(:model1) { double('model') }
let(:model2) { double('model') }
let(:partition_monitoring_class) { described_class::PartitionMonitoring }
context 'when no partitioned models are given' do
it 'reports metrics for each registered model' do
expect_next_instance_of(partition_monitoring_class) do |partition_monitor|
expect(partition_monitor).to receive(:report_metrics_for_model).with(model1)
expect(partition_monitor).to receive(:report_metrics_for_model).with(model2)
end
expect(Gitlab::Database::EachDatabase).to receive(:each_model_connection)
.with(described_class.__send__(:registered_models))
.and_yield(model1)
.and_yield(model2)
described_class.report_metrics
end
end
context 'when partitioned models are given' do
it 'reports metrics for each given model' do
expect_next_instance_of(partition_monitoring_class) do |partition_monitor|
expect(partition_monitor).to receive(:report_metrics_for_model).with(model1)
expect(partition_monitor).to receive(:report_metrics_for_model).with(model2)
end
expect(Gitlab::Database::EachDatabase).to receive(:each_model_connection)
.with([model1, model2])
.and_yield(model1)
.and_yield(model2)
described_class.report_metrics([model1, model2])
end
end
end
describe '.drop_detached_partitions' do
let(:table_names) { %w[detached_test_partition1 detached_test_partition2] }
before do
table_names.each do |table_name|
connection.create_table("#{Gitlab::Database::DYNAMIC_PARTITIONS_SCHEMA}.#{table_name}")
Postgresql::DetachedPartition.create!(table_name: table_name, drop_after: 1.year.ago)
end
end
it 'drops detached partitions for each database' do
expect(Gitlab::Database::EachDatabase).to receive(:each_database_connection).and_yield
expect { described_class.drop_detached_partitions }
.to change { Postgresql::DetachedPartition.count }.from(2).to(0)
.and change { table_exists?(table_names.first) }.from(true).to(false)
.and change { table_exists?(table_names.last) }.from(true).to(false)
end
def table_exists?(table_name)
table_oid(table_name).present?
end
end
end
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