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|
# frozen_string_literal: true
# rubocop:todo all
require 'spec_helper'
describe Mongo::QueryCache do
around do |spec|
Mongo::QueryCache.clear
Mongo::QueryCache.cache { spec.run }
end
before do
authorized_collection.delete_many
end
let(:subscriber) { Mrss::EventSubscriber.new }
let(:client) do
authorized_client.tap do |client|
client.subscribe(Mongo::Monitoring::COMMAND, subscriber)
end
end
let(:authorized_collection) { client['collection_spec'] }
let(:events) do
subscriber.command_started_events('find')
end
describe '#enabled' do
context 'when query cache is disabled' do
before do
Mongo::QueryCache.enabled = false
end
it 'disables the query cache' do
expect(Mongo::QueryCache.enabled?).to be(false)
end
end
context 'when query cache is enabled' do
before do
Mongo::QueryCache.enabled = true
end
it 'enables the query cache' do
expect(Mongo::QueryCache.enabled?).to be(true)
end
end
end
describe '#cache' do
before do
Mongo::QueryCache.enabled = false
end
it 'enables the query cache inside the block' do
Mongo::QueryCache.cache do
expect(Mongo::QueryCache.enabled?).to be(true)
end
expect(Mongo::QueryCache.enabled?).to be(false)
end
end
describe '#uncached' do
it 'disables the query cache inside the block' do
Mongo::QueryCache.uncached do
expect(Mongo::QueryCache.enabled?).to be(false)
end
expect(Mongo::QueryCache.enabled?).to be(true)
end
end
describe '#cache_table' do
before do
authorized_collection.insert_one({ name: 'testing' })
authorized_collection.find(name: 'testing').to_a
end
it 'gets the cached query' do
expect(Mongo::QueryCache.send(:cache_table).length).to eq(1)
authorized_collection.find(name: 'testing').to_a
expect(events.length).to eq(1)
end
end
describe '#clear' do
before do
authorized_collection.insert_one({ name: 'testing' })
authorized_collection.find(name: 'testing').to_a
end
it 'clears the cache' do
expect(Mongo::QueryCache.send(:cache_table).length).to eq(1)
Mongo::QueryCache.clear
expect(Mongo::QueryCache.send(:cache_table).length).to eq(0)
end
end
describe '#set' do
let(:caching_cursor) { double("Mongo::CachingCursor") }
let(:namespace) { 'db.coll' }
let(:selector) { { field: 'value' } }
let(:skip) { 5 }
let(:sort) { { field: 'asc' } }
let(:limit) { 5 }
let(:projection) { { field: 1 } }
let(:collation) { { locale: 'fr_CA' } }
let(:read_concern) { { level: :majority } }
let(:read_preference) { { mode: :secondary } }
let(:options) do
{
namespace: namespace,
selector: selector,
skip: skip,
sort: sort,
limit: limit,
projection: projection,
collation: collation,
read_concern: read_concern,
read_preference: read_preference,
}
end
it 'stores the cursor at the correct key' do
Mongo::QueryCache.set(caching_cursor, **options)
expect(Mongo::QueryCache.send(:cache_table)[namespace][[namespace, selector, skip, sort, projection, collation, read_concern, read_preference]]).to eq(caching_cursor)
end
end
describe '#get' do
let(:view) do
double("Mongo::Collection::View").tap do |view|
allow(view).to receive(:client).and_return(client)
allow(view).to receive(:operation_timeouts).and_return({})
end
end
let(:result) do
double("Mongo::Operation::Result").tap do |result|
allow(result).to receive(:is_a?).with(Mongo::Operation::Result).and_return(true)
end
end
let(:server) { double("Mongo::Server") }
let(:caching_cursor) { Mongo::CachingCursor.new(view, result, server) }
let(:options) do
{
namespace: 'db.coll',
selector: { field: 'value' },
}
end
before do
allow(result).to receive(:cursor_id) { 0 }
allow(result).to receive(:namespace) { 'db.coll' }
allow(result).to receive(:connection_global_id) { 1 }
allow(view).to receive(:limit) { nil }
end
[true, false].each do |load_balancer|
context "when load_balancer is #{load_balancer}" do
before do
allow(server).to receive(:load_balancer?) { load_balancer }
if load_balancer
allow(result).to receive(:connection) { nil }
end
end
context 'when there is no entry in the cache' do
it 'returns nil' do
expect(Mongo::QueryCache.get(**options)).to be_nil
end
end
context 'when there is an entry in the cache' do
before do
Mongo::QueryCache.set(caching_cursor, **caching_cursor_options)
end
context 'when that entry has no limit' do
let(:caching_cursor_options) do
{
namespace: 'db.coll',
selector: { field: 'value' },
}
end
let(:query_options) do
caching_cursor_options.merge(limit: limit)
end
context 'when the query has a limit' do
let(:limit) { 5 }
it 'returns the caching cursor' do
expect(Mongo::QueryCache.get(**query_options)).to eq(caching_cursor)
end
end
context 'when the query has a limit but negative' do
let(:limit) { -5 }
it 'returns the caching cursor' do
expect(Mongo::QueryCache.get(**query_options)).to eq(caching_cursor)
end
end
context 'when the query has no limit' do
let(:limit) { nil }
it 'returns the caching cursor' do
expect(Mongo::QueryCache.get(**query_options)).to eq(caching_cursor)
end
end
context 'when the query has a 0 limit' do
let(:limit) { 0 }
it 'returns the caching cursor' do
expect(Mongo::QueryCache.get(**query_options)).to eq(caching_cursor)
end
end
end
context 'when that entry has a 0 limit' do
let(:caching_cursor_options) do
{
namespace: 'db.coll',
selector: { field: 'value' },
limit: 0,
}
end
let(:query_options) do
caching_cursor_options.merge(limit: limit)
end
before do
allow(view).to receive(:limit) { 0 }
end
context 'when the query has a limit' do
let(:limit) { 5 }
it 'returns the caching cursor' do
expect(Mongo::QueryCache.get(**query_options)).to eq(caching_cursor)
end
end
context 'when the query has a limit but negative' do
let(:limit) { -5 }
it 'returns the caching cursor' do
expect(Mongo::QueryCache.get(**query_options)).to eq(caching_cursor)
end
end
context 'when the query has no limit' do
let(:limit) { nil }
it 'returns the caching cursor' do
expect(Mongo::QueryCache.get(**query_options)).to eq(caching_cursor)
end
end
context 'when the query has a 0 limit' do
let(:limit) { 0 }
it 'returns the caching cursor' do
expect(Mongo::QueryCache.get(**query_options)).to eq(caching_cursor)
end
end
end
context 'when that entry has a limit' do
let(:caching_cursor_options) do
{
namespace: 'db.coll',
selector: { field: 'value' },
limit: 5,
}
end
let(:query_options) do
caching_cursor_options.merge(limit: limit)
end
before do
allow(view).to receive(:limit) { 5 }
end
context 'and the new query has a smaller limit' do
let(:limit) { 4 }
it 'returns the caching cursor' do
expect(Mongo::QueryCache.get(**query_options)).to eq(caching_cursor)
end
end
context 'and the new query has a smaller limit but negative' do
let(:limit) { -4 }
it 'returns the caching cursor' do
expect(Mongo::QueryCache.get(**query_options)).to eq(caching_cursor)
end
end
context 'and the new query has a larger limit' do
let(:limit) { 6 }
it 'returns nil' do
expect(Mongo::QueryCache.get(**query_options)).to be_nil
end
end
context 'and the new query has a larger limit but negative' do
let(:limit) { -6 }
it 'returns nil' do
expect(Mongo::QueryCache.get(**query_options)).to be_nil
end
end
context 'and the new query has the same limit' do
let(:limit) { 5 }
it 'returns the caching cursor' do
expect(Mongo::QueryCache.get(**query_options)).to eq(caching_cursor)
end
end
context 'and the new query has the same limit but negative' do
let(:limit) { -5 }
it 'returns the caching cursor' do
expect(Mongo::QueryCache.get(**query_options)).to eq(caching_cursor)
end
end
context 'and the new query has no limit' do
let(:limit) { nil }
it 'returns nil' do
expect(Mongo::QueryCache.get(**query_options)).to be_nil
end
end
context 'and the new query has a 0 limit' do
let(:limit) { 0 }
it 'returns nil' do
expect(Mongo::QueryCache.get(**query_options)).to be_nil
end
end
end
context 'when that entry has a negative limit' do
let(:caching_cursor_options) do
{
namespace: 'db.coll',
selector: { field: 'value' },
limit: -5,
}
end
let(:query_options) do
caching_cursor_options.merge(limit: limit)
end
before do
allow(view).to receive(:limit) { -5 }
end
context 'and the new query has a smaller limit' do
let(:limit) { 4 }
it 'returns the caching cursor' do
expect(Mongo::QueryCache.get(**query_options)).to eq(caching_cursor)
end
end
context 'and the new query has a larger limit' do
let(:limit) { 6 }
it 'returns nil' do
expect(Mongo::QueryCache.get(**query_options)).to be_nil
end
end
context 'and the new query has the same negative limit' do
let(:limit) { -5 }
it 'returns the caching cursor' do
expect(Mongo::QueryCache.get(**query_options)).to eq(caching_cursor)
end
end
context 'and the new query has the same positive limit' do
let(:limit) { 5 }
it 'returns the caching cursor' do
expect(Mongo::QueryCache.get(**query_options)).to eq(caching_cursor)
end
end
context 'and the new query has no limit' do
let(:limit) { nil }
it 'returns nil' do
expect(Mongo::QueryCache.get(**query_options)).to be_nil
end
end
context 'and the new query has a 0 limit' do
let(:limit) { 0 }
it 'returns nil' do
expect(Mongo::QueryCache.get(**query_options)).to be_nil
end
end
end
end
end
end
end
describe '#clear_namespace' do
let(:caching_cursor) { double("Mongo::CachingCursor") }
let(:namespace1) { 'db.coll' }
let(:namespace2) { 'db.coll2' }
let(:namespace3) { 'db.coll3' }
let(:selector) { { field: 'value' } }
before do
Mongo::QueryCache.set(caching_cursor, namespace: namespace1, selector: selector)
Mongo::QueryCache.set(caching_cursor, namespace: namespace2, selector: selector)
Mongo::QueryCache.set(caching_cursor, namespace: namespace3, selector: selector, multi_collection: true)
end
it 'returns nil' do
expect(Mongo::QueryCache.clear_namespace(namespace1)).to be_nil
end
it 'clears the specified namespace in the query cache' do
Mongo::QueryCache.clear_namespace(namespace1)
expect(Mongo::QueryCache.send(:cache_table)[namespace1]).to be_nil
end
it 'does not clear other namespaces in the query cache' do
Mongo::QueryCache.clear_namespace(namespace1)
expect(Mongo::QueryCache.send(:cache_table)[namespace2]).not_to be_nil
end
it 'clears the nil namespace' do
Mongo::QueryCache.clear_namespace(namespace1)
expect(Mongo::QueryCache.send(:cache_table)[nil]).to be_nil
end
end
end
|
