diff options
Diffstat (limited to 'spec/lib/gitlab/database/partitioning/time_partition_spec.rb')
| -rw-r--r-- | spec/lib/gitlab/database/partitioning/time_partition_spec.rb | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/spec/lib/gitlab/database/partitioning/time_partition_spec.rb b/spec/lib/gitlab/database/partitioning/time_partition_spec.rb new file mode 100644 index 00000000000..700202d81c5 --- /dev/null +++ b/spec/lib/gitlab/database/partitioning/time_partition_spec.rb @@ -0,0 +1,174 @@ +# frozen_string_literal: true + +require 'spec_helper' + +RSpec.describe Gitlab::Database::Partitioning::TimePartition do + describe '.from_sql' do + subject { described_class.from_sql(table, partition_name, definition) } + + let(:table) { 'foo' } + let(:partition_name) { 'foo_bar' } + let(:definition) { 'FOR VALUES FROM (\'2020-04-01 00:00:00\') TO (\'2020-05-01 00:00:00\')' } + + it 'uses specified table name' do + expect(subject.table).to eq(table) + end + + it 'uses specified partition name' do + expect(subject.partition_name).to eq(partition_name) + end + + it 'parses start date' do + expect(subject.from).to eq(Date.parse('2020-04-01')) + end + + it 'parses end date' do + expect(subject.to).to eq(Date.parse('2020-05-01')) + end + + context 'with MINVALUE as a start date' do + let(:definition) { 'FOR VALUES FROM (MINVALUE) TO (\'2020-05-01\')' } + + it 'sets from to nil' do + expect(subject.from).to be_nil + end + end + + context 'with MAXVALUE as an end date' do + let(:definition) { 'FOR VALUES FROM (\'2020-04-01\') TO (MAXVALUE)' } + + it 'raises a NotImplementedError' do + expect { subject }.to raise_error(NotImplementedError) + end + end + end + + describe '#partition_name' do + subject { described_class.new(table, from, to, partition_name: partition_name).partition_name } + + let(:table) { 'foo' } + let(:from) { '2020-04-01 00:00:00' } + let(:to) { '2020-05-01 00:00:00' } + let(:partition_name) { nil } + + it 'uses table as prefix' do + expect(subject).to start_with(table) + end + + it 'uses Year-Month (from) as suffix' do + expect(subject).to end_with("_202004") + end + + context 'without from date' do + let(:from) { nil } + + it 'uses 000000 as suffix for first partition' do + expect(subject).to end_with("_000000") + end + end + + context 'with partition name explicitly given' do + let(:partition_name) { "foo_bar" } + + it 'uses given partition name' do + expect(subject).to eq(partition_name) + end + end + end + + describe '#to_sql' do + subject { described_class.new(table, from, to).to_sql } + + let(:table) { 'foo' } + let(:from) { '2020-04-01 00:00:00' } + let(:to) { '2020-05-01 00:00:00' } + + it 'transforms to a CREATE TABLE statement' do + expect(subject).to eq(<<~SQL) + CREATE TABLE IF NOT EXISTS "#{Gitlab::Database::DYNAMIC_PARTITIONS_SCHEMA}"."foo_202004" + PARTITION OF "foo" + FOR VALUES FROM ('2020-04-01') TO ('2020-05-01') + SQL + end + + context 'without from date' do + let(:from) { nil } + + it 'uses MINVALUE instead' do + expect(subject).to eq(<<~SQL) + CREATE TABLE IF NOT EXISTS "#{Gitlab::Database::DYNAMIC_PARTITIONS_SCHEMA}"."foo_000000" + PARTITION OF "foo" + FOR VALUES FROM (MINVALUE) TO ('2020-05-01') + SQL + end + end + end + + describe 'object equality - #eql' do + def expect_inequality(actual, other) + expect(actual.eql?(other)).to be_falsey + expect(actual).not_to eq(other) + end + + def expect_equality(actual, other) + expect(actual).to eq(other) + expect(actual.eql?(other)).to be_truthy + expect(actual.hash).to eq(other.hash) + end + + def make_new(table: 'foo', from: '2020-04-01 00:00:00', to: '2020-05-01 00:00:00', partition_name: 'foo_202004') + described_class.new(table, from, to, partition_name: partition_name) + end + + it 'treats objects identical with identical attributes' do + expect_equality(make_new, make_new) + end + + it 'different table leads to in-equality' do + expect_inequality(make_new, make_new(table: 'bar')) + end + + it 'different from leads to in-equality' do + expect_inequality(make_new, make_new(from: '2020-05-01 00:00:00')) + end + + it 'different to leads to in-equality' do + expect_inequality(make_new, make_new(to: '2020-06-01 00:00:00')) + end + + it 'different partition_name leads to in-equality' do + expect_inequality(make_new, make_new(partition_name: 'different')) + end + + it 'nil partition_name is ignored if auto-generated matches' do + expect_equality(make_new, make_new(partition_name: nil)) + end + end + + describe 'Comparable, #<=>' do + let(:table) { 'foo' } + + it 'sorts by partition name, i.e. by month - MINVALUE partition first' do + partitions = [ + described_class.new(table, '2020-04-01', '2020-05-01'), + described_class.new(table, '2020-02-01', '2020-03-01'), + described_class.new(table, nil, '2020-02-01'), + described_class.new(table, '2020-03-01', '2020-04-01') + ] + + expect(partitions.sort).to eq([ + described_class.new(table, nil, '2020-02-01'), + described_class.new(table, '2020-02-01', '2020-03-01'), + described_class.new(table, '2020-03-01', '2020-04-01'), + described_class.new(table, '2020-04-01', '2020-05-01') + ]) + end + + it 'returns nil for partitions of different tables' do + one = described_class.new('foo', '2020-02-01', '2020-03-01') + two = described_class.new('bar', '2020-02-01', '2020-03-01') + + expect(one.<=>(two)).to be_nil + end + end +end |