gitlab-org--gitlab-foss/spec/initializers/database_config_spec.rb

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# frozen_string_literal: true
require 'spec_helper'
describe 'Database config initializer' do
subject do
load Rails.root.join('config/initializers/database_config.rb')
end
before do
allow(ActiveRecord::Base).to receive(:establish_connection)
end
context "when using Puma" do
let(:puma) { double('puma') }
let(:puma_options) { { max_threads: 8 } }
before do
stub_const("Puma", puma)
allow(puma).to receive_message_chain(:cli_config, :options).and_return(puma_options)
end
context "and no existing pool size is set" do
before do
stub_database_config(pool_size: nil)
end
it "sets it to the max number of worker threads" do
expect { subject }.to change { Gitlab::Database.config['pool'] }.from(nil).to(8)
end
end
context "and the existing pool size is smaller than the max number of worker threads" do
before do
stub_database_config(pool_size: 7)
end
it "sets it to the max number of worker threads" do
expect { subject }.to change { Gitlab::Database.config['pool'] }.from(7).to(8)
end
end
context "and the existing pool size is larger than the max number of worker threads" do
before do
stub_database_config(pool_size: 9)
end
it "keeps the configured pool size" do
expect { subject }.not_to change { Gitlab::Database.config['pool'] }
end
end
end
context "when not using Puma" do
before do
stub_database_config(pool_size: 7)
end
it "does nothing" do
expect { subject }.not_to change { Gitlab::Database.config['pool'] }
end
end
def stub_database_config(pool_size:)
config = {
'adapter' => 'postgresql',
'host' => 'db.host.com',
'pool' => pool_size
}.compact
allow(Gitlab::Database).to receive(:config).and_return(config)
end
end