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# frozen_string_literal: true
require 'spec_helper'
RSpec.describe Gitlab::Database::AsyncIndexes::MigrationHelpers do
let(:migration) { ActiveRecord::Migration.new.extend(described_class) }
let(:index_model) { Gitlab::Database::AsyncIndexes::PostgresAsyncIndex }
let(:connection) { ApplicationRecord.connection }
let(:table_name) { '_test_async_indexes' }
let(:index_name) { "index_#{table_name}_on_id" }
before do
allow(migration).to receive(:puts)
end
describe '#unprepare_async_index' do
let!(:async_index) { create(:postgres_async_index, name: index_name) }
it 'destroys the record' do
expect do
migration.unprepare_async_index(table_name, 'id')
end.to change { index_model.where(name: index_name).count }.by(-1)
end
context 'when an explicit name is given' do
let(:index_name) { 'my_test_async_index' }
it 'destroys the record' do
expect do
migration.unprepare_async_index(table_name, 'id', name: index_name)
end.to change { index_model.where(name: index_name).count }.by(-1)
end
end
context 'when the async index table does not exist' do
it 'does not raise an error' do
connection.drop_table(:postgres_async_indexes)
expect(index_model).not_to receive(:find_by)
expect { migration.unprepare_async_index(table_name, 'id') }.not_to raise_error
end
end
end
describe '#unprepare_async_index_by_name' do
let(:index_name) { "index_#{table_name}_on_id" }
let!(:async_index) { create(:postgres_async_index, name: index_name) }
it 'destroys the record' do
expect do
migration.unprepare_async_index_by_name(table_name, index_name)
end.to change { index_model.where(name: index_name).count }.by(-1)
end
context 'when the async index table does not exist' do
it 'does not raise an error' do
connection.drop_table(:postgres_async_indexes)
expect(index_model).not_to receive(:find_by)
expect { migration.unprepare_async_index_by_name(table_name, index_name) }.not_to raise_error
end
end
end
describe '#prepare_async_index' do
before do
connection.create_table(table_name)
end
it 'creates the record for the async index' do
expect do
migration.prepare_async_index(table_name, 'id')
end.to change { index_model.where(name: index_name).count }.by(1)
record = index_model.find_by(name: index_name)
expect(record.table_name).to eq(table_name)
expect(record.definition).to match(/CREATE INDEX CONCURRENTLY "#{index_name}"/)
end
context 'when an explicit name is given' do
let(:index_name) { 'my_async_index_name' }
it 'creates the record with the given name' do
expect do
migration.prepare_async_index(table_name, 'id', name: index_name)
end.to change { index_model.where(name: index_name).count }.by(1)
record = index_model.find_by(name: index_name)
expect(record.table_name).to eq(table_name)
expect(record.definition).to match(/CREATE INDEX CONCURRENTLY "#{index_name}"/)
end
end
context 'when the index already exists' do
it 'does not create the record' do
connection.add_index(table_name, 'id', name: index_name)
expect do
migration.prepare_async_index(table_name, 'id')
end.not_to change { index_model.where(name: index_name).count }
end
end
context 'when the record already exists' do
it 'does attempt to create the record' do
create(:postgres_async_index, table_name: table_name, name: index_name)
expect do
migration.prepare_async_index(table_name, 'id')
end.not_to change { index_model.where(name: index_name).count }
end
it 'updates definition if changed' do
index = create(:postgres_async_index, table_name: table_name, name: index_name, definition: '...')
expect do
migration.prepare_async_index(table_name, 'id', name: index_name)
end.to change { index.reload.definition }
end
it 'does not update definition if not changed' do
definition = "CREATE INDEX CONCURRENTLY \"index_#{table_name}_on_id\" ON \"#{table_name}\" (\"id\")"
index = create(:postgres_async_index, table_name: table_name, name: index_name, definition: definition)
expect do
migration.prepare_async_index(table_name, 'id', name: index_name)
end.not_to change { index.reload.updated_at }
end
end
context 'when the async index table does not exist' do
it 'does not raise an error' do
connection.drop_table(:postgres_async_indexes)
expect(index_model).not_to receive(:safe_find_or_create_by!)
expect { migration.prepare_async_index(table_name, 'id') }.not_to raise_error
end
end
end
describe '#prepare_async_index_removal' do
before do
connection.create_table(table_name)
connection.add_index(table_name, 'id', name: index_name)
end
it 'creates the record for the async index removal' do
expect do
migration.prepare_async_index_removal(table_name, 'id', name: index_name)
end.to change { index_model.where(name: index_name).count }.by(1)
record = index_model.find_by(name: index_name)
expect(record.table_name).to eq(table_name)
expect(record.definition).to match(/DROP INDEX CONCURRENTLY "#{index_name}"/)
end
context 'when the index does not exist' do
it 'does not create the record' do
connection.remove_index(table_name, 'id', name: index_name)
expect do
migration.prepare_async_index_removal(table_name, 'id', name: index_name)
end.not_to change { index_model.where(name: index_name).count }
end
end
context 'when the record already exists' do
it 'does attempt to create the record' do
create(:postgres_async_index, table_name: table_name, name: index_name)
expect do
migration.prepare_async_index_removal(table_name, 'id', name: index_name)
end.not_to change { index_model.where(name: index_name).count }
end
end
end
end
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