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# frozen_string_literal: true
require 'spec_helper'
describe Gitlab::Database::BatchCount do
let(:model) { Issue }
let(:column) { :author_id }
let(:in_transaction) { false }
let(:user) { create(:user) }
let(:another_user) { create(:user) }
before do
create_list(:issue, 3, author: user )
create_list(:issue, 2, author: another_user )
allow(ActiveRecord::Base.connection).to receive(:transaction_open?).and_return(in_transaction)
end
describe '#batch_count' do
it 'counts table' do
expect(described_class.batch_count(model)).to eq(5)
end
it 'counts with :id field' do
expect(described_class.batch_count(model, :id)).to eq(5)
end
it 'counts with "id" field' do
expect(described_class.batch_count(model, 'id')).to eq(5)
end
it 'counts with table.id field' do
expect(described_class.batch_count(model, "#{model.table_name}.id")).to eq(5)
end
it 'counts table with batch_size 50K' do
expect(described_class.batch_count(model, batch_size: 50_000)).to eq(5)
end
it 'will not count table with batch_size 1K' do
fallback = ::Gitlab::Database::BatchCounter::FALLBACK
expect(described_class.batch_count(model, batch_size: fallback / 2)).to eq(fallback)
end
it 'counts with a small edge case batch_sizes than result' do
stub_const('Gitlab::Database::BatchCounter::MIN_REQUIRED_BATCH_SIZE', 0)
[1, 2, 4, 5, 6].each { |i| expect(described_class.batch_count(model, batch_size: i)).to eq(5) }
end
context 'in a transaction' do
let(:in_transaction) { true }
it 'cannot count' do
expect do
described_class.batch_count(model)
end.to raise_error 'BatchCount can not be run inside a transaction'
end
end
end
describe '#batch_distinct_count' do
it 'counts with :id field' do
expect(described_class.batch_distinct_count(model, :id)).to eq(5)
end
it 'counts with column field' do
expect(described_class.batch_distinct_count(model, column)).to eq(2)
end
it 'counts with "id" field' do
expect(described_class.batch_distinct_count(model, "#{column}")).to eq(2)
end
it 'counts with table.column field' do
expect(described_class.batch_distinct_count(model, "#{model.table_name}.#{column}")).to eq(2)
end
it 'counts with :column field with batch_size of 50K' do
expect(described_class.batch_distinct_count(model, column, batch_size: 50_000)).to eq(2)
end
it 'will not count table with batch_size 1K' do
fallback = ::Gitlab::Database::BatchCounter::FALLBACK
expect(described_class.batch_distinct_count(model, column, batch_size: fallback / 2)).to eq(fallback)
end
it 'counts with a small edge case batch_sizes than result' do
stub_const('Gitlab::Database::BatchCounter::MIN_REQUIRED_BATCH_SIZE', 0)
[1, 2, 4, 5, 6].each { |i| expect(described_class.batch_distinct_count(model, column, batch_size: i)).to eq(2) }
end
it 'counts with a start and finish' do
expect(described_class.batch_distinct_count(model, column, start: model.minimum(column), finish: model.maximum(column))).to eq(2)
end
it 'counts with User min and max as start and finish' do
expect(described_class.batch_distinct_count(model, column, start: User.minimum(:id), finish: User.maximum(:id))).to eq(2)
end
end
end
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