94 lines
2.9 KiB
Ruby
94 lines
2.9 KiB
Ruby
# frozen_string_literal: true
|
|
|
|
require 'spec_helper'
|
|
|
|
RSpec.describe Gitlab::Database::Count do
|
|
before do
|
|
create_list(:project, 3)
|
|
create(:identity)
|
|
end
|
|
|
|
let(:models) { [Project, Identity] }
|
|
|
|
describe '.approximate_counts' do
|
|
context 'fallbacks' do
|
|
subject { described_class.approximate_counts(models, strategies: strategies) }
|
|
|
|
let(:strategies) do
|
|
[
|
|
double('s1', new: first_strategy),
|
|
double('s2', new: second_strategy)
|
|
]
|
|
end
|
|
|
|
let(:first_strategy) { double('first strategy', count: {}) }
|
|
let(:second_strategy) { double('second strategy', count: {}) }
|
|
|
|
it 'gets results from first strategy' do
|
|
expect(strategies[0]).to receive(:new).with(models).and_return(first_strategy)
|
|
expect(first_strategy).to receive(:count)
|
|
|
|
subject
|
|
end
|
|
|
|
it 'gets more results from second strategy if some counts are missing' do
|
|
expect(first_strategy).to receive(:count).and_return({ Project => 3 })
|
|
expect(strategies[1]).to receive(:new).with([Identity]).and_return(second_strategy)
|
|
expect(second_strategy).to receive(:count).and_return({ Identity => 1 })
|
|
|
|
expect(subject).to eq({ Project => 3, Identity => 1 })
|
|
end
|
|
|
|
it 'does not get more results as soon as all counts are present' do
|
|
expect(first_strategy).to receive(:count).and_return({ Project => 3, Identity => 1 })
|
|
expect(strategies[1]).not_to receive(:new)
|
|
|
|
subject
|
|
end
|
|
end
|
|
|
|
context 'default strategies' do
|
|
subject { described_class.approximate_counts(models) }
|
|
|
|
context 'with a read-only database' do
|
|
before do
|
|
allow(Gitlab::Database).to receive(:read_only?).and_return(true)
|
|
end
|
|
|
|
it 'only uses the ExactCountStrategy' do
|
|
allow_next_instance_of(Gitlab::Database::Count::TablesampleCountStrategy) do |instance|
|
|
expect(instance).not_to receive(:count)
|
|
end
|
|
allow_next_instance_of(Gitlab::Database::Count::ReltuplesCountStrategy) do |instance|
|
|
expect(instance).not_to receive(:count)
|
|
end
|
|
expect_next_instance_of(Gitlab::Database::Count::ExactCountStrategy) do |instance|
|
|
expect(instance).to receive(:count).and_return({})
|
|
end
|
|
|
|
subject
|
|
end
|
|
end
|
|
|
|
context 'with a read-write database' do
|
|
before do
|
|
allow(Gitlab::Database).to receive(:read_only?).and_return(false)
|
|
end
|
|
|
|
it 'uses the available strategies' do
|
|
[
|
|
Gitlab::Database::Count::TablesampleCountStrategy,
|
|
Gitlab::Database::Count::ReltuplesCountStrategy,
|
|
Gitlab::Database::Count::ExactCountStrategy
|
|
].each do |strategy_klass|
|
|
expect_next_instance_of(strategy_klass) do |instance|
|
|
expect(instance).to receive(:count).and_return({})
|
|
end
|
|
end
|
|
|
|
subject
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end
|