require 'spec_helper' describe Gitlab::Database do before do stub_const('MigrationTest', Class.new { include Gitlab::Database }) end describe '.config' do it 'returns a Hash' do expect(described_class.config).to be_an_instance_of(Hash) end end describe '.adapter_name' do it 'returns the name of the adapter' do expect(described_class.adapter_name).to be_an_instance_of(String) end end # These are just simple smoke tests to check if the methods work (regardless # of what they may return). describe '.mysql?' do subject { described_class.mysql? } it { is_expected.to satisfy { |val| val == true || val == false } } end describe '.postgresql?' do subject { described_class.postgresql? } it { is_expected.to satisfy { |val| val == true || val == false } } end describe '.version' do context "on mysql" do it "extracts the version number" do allow(described_class).to receive(:database_version) .and_return("5.7.12-standard") expect(described_class.version).to eq '5.7.12-standard' end end context "on postgresql" do it "extracts the version number" do allow(described_class).to receive(:database_version) .and_return("PostgreSQL 9.4.4 on x86_64-apple-darwin14.3.0") expect(described_class.version).to eq '9.4.4' end end end describe '.nulls_last_order' do context 'when using PostgreSQL' do before do expect(described_class).to receive(:postgresql?).and_return(true) end it { expect(described_class.nulls_last_order('column', 'ASC')).to eq 'column ASC NULLS LAST'} it { expect(described_class.nulls_last_order('column', 'DESC')).to eq 'column DESC NULLS LAST'} end context 'when using MySQL' do before do expect(described_class).to receive(:postgresql?).and_return(false) end it { expect(described_class.nulls_last_order('column', 'ASC')).to eq 'column IS NULL, column ASC'} it { expect(described_class.nulls_last_order('column', 'DESC')).to eq 'column DESC'} end end describe '.nulls_first_order' do context 'when using PostgreSQL' do before do expect(described_class).to receive(:postgresql?).and_return(true) end it { expect(described_class.nulls_first_order('column', 'ASC')).to eq 'column ASC NULLS FIRST'} it { expect(described_class.nulls_first_order('column', 'DESC')).to eq 'column DESC NULLS FIRST'} end context 'when using MySQL' do before do expect(described_class).to receive(:postgresql?).and_return(false) end it { expect(described_class.nulls_first_order('column', 'ASC')).to eq 'column ASC'} it { expect(described_class.nulls_first_order('column', 'DESC')).to eq 'column IS NULL, column DESC'} end end describe '.with_connection_pool' do it 'creates a new connection pool and disconnect it after used' do closed_pool = nil described_class.with_connection_pool(1) do |pool| pool.with_connection do |connection| connection.execute('SELECT 1 AS value') end expect(pool).to be_connected closed_pool = pool end expect(closed_pool).not_to be_connected end it 'disconnects the pool even an exception was raised' do error = Class.new(RuntimeError) closed_pool = nil begin described_class.with_connection_pool(1) do |pool| pool.with_connection do |connection| connection.execute('SELECT 1 AS value') end closed_pool = pool raise error.new('boom') end rescue error end expect(closed_pool).not_to be_connected end end describe '.bulk_insert' do before do allow(described_class).to receive(:connection).and_return(connection) allow(connection).to receive(:quote_column_name, &:itself) allow(connection).to receive(:quote, &:itself) allow(connection).to receive(:execute) end let(:connection) { double(:connection) } let(:rows) do [ { a: 1, b: 2, c: 3 }, { c: 6, a: 4, b: 5 } ] end it 'does nothing with empty rows' do expect(connection).not_to receive(:execute) described_class.bulk_insert('test', []) end it 'uses the ordering from the first row' do expect(connection).to receive(:execute) do |sql| expect(sql).to include('(1, 2, 3)') expect(sql).to include('(4, 5, 6)') end described_class.bulk_insert('test', rows) end it 'quotes column names' do expect(connection).to receive(:quote_column_name).with(:a) expect(connection).to receive(:quote_column_name).with(:b) expect(connection).to receive(:quote_column_name).with(:c) described_class.bulk_insert('test', rows) end it 'quotes values' do 1.upto(6) do |i| expect(connection).to receive(:quote).with(i) end described_class.bulk_insert('test', rows) end it 'handles non-UTF-8 data' do expect { described_class.bulk_insert('test', [{ a: "\255" }]) }.not_to raise_error end end describe '.create_connection_pool' do it 'creates a new connection pool with specific pool size' do pool = described_class.create_connection_pool(5) begin expect(pool) .to be_kind_of(ActiveRecord::ConnectionAdapters::ConnectionPool) expect(pool.spec.config[:pool]).to eq(5) ensure pool.disconnect! end end it 'allows setting of a custom hostname' do pool = described_class.create_connection_pool(5, '127.0.0.1') begin expect(pool.spec.config[:host]).to eq('127.0.0.1') ensure pool.disconnect! end end end describe '#true_value' do it 'returns correct value for PostgreSQL' do expect(described_class).to receive(:postgresql?).and_return(true) expect(described_class.true_value).to eq "'t'" end it 'returns correct value for MySQL' do expect(described_class).to receive(:postgresql?).and_return(false) expect(described_class.true_value).to eq 1 end end describe '#false_value' do it 'returns correct value for PostgreSQL' do expect(described_class).to receive(:postgresql?).and_return(true) expect(described_class.false_value).to eq "'f'" end it 'returns correct value for MySQL' do expect(described_class).to receive(:postgresql?).and_return(false) expect(described_class.false_value).to eq 0 end end end