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require 'spec_helper'
describe Gitlab::Database::Count do
before do
create_list(:project, 3)
end
describe '.execute_estimate_if_updated_recently', :postgresql do
context 'when reltuples have not been updated' do
before do
expect(described_class).to receive(:reltuples_updated_recently?).and_return(false)
end
it 'returns nil' do
expect(described_class.execute_estimate_if_updated_recently(Project)).to be nil
end
end
context 'when reltuples have been updated' do
before do
ActiveRecord::Base.connection.execute('ANALYZE projects')
end
it 'calls postgresql_estimate_query' do
expect(described_class).to receive(:postgresql_estimate_query).with(Project).and_call_original
expect(described_class.execute_estimate_if_updated_recently(Project)).to eq(3)
end
end
end
describe '.approximate_count' do
context 'when reltuples have not been updated' do
it 'counts all projects the normal way' do
allow(described_class).to receive(:reltuples_updated_recently?).and_return(false)
expect(Project).to receive(:count).and_call_original
expect(described_class.approximate_count(Project)).to eq(3)
end
end
context 'no permission' do
it 'falls back to standard query' do
allow(described_class).to receive(:reltuples_updated_recently?).and_raise(PG::InsufficientPrivilege)
expect(Project).to receive(:count).and_call_original
expect(described_class.approximate_count(Project)).to eq(3)
end
end
describe 'when reltuples have been updated', :postgresql do
before do
ActiveRecord::Base.connection.execute('ANALYZE projects')
end
it 'counts all projects in the fast way' do
expect(described_class).to receive(:postgresql_estimate_query).with(Project).and_call_original
expect(described_class.approximate_count(Project)).to eq(3)
end
end
end
end
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