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require 'cases/helper'
require 'active_record/explain_subscriber'
require 'active_record/explain_registry'
if ActiveRecord::Base.connection.supports_explain?
class ExplainSubscriberTest < ActiveRecord::TestCase
SUBSCRIBER = ActiveRecord::ExplainSubscriber.new
def setup
ActiveRecord::ExplainRegistry.reset
ActiveRecord::ExplainRegistry.collect = true
end
def test_collects_nothing_if_the_payload_has_an_exception
SUBSCRIBER.finish(nil, nil, exception: Exception.new)
assert queries.empty?
end
def test_collects_nothing_for_ignored_payloads
ActiveRecord::ExplainSubscriber::IGNORED_PAYLOADS.each do |ip|
SUBSCRIBER.finish(nil, nil, name: ip)
end
assert queries.empty?
end
def test_collects_nothing_if_collect_is_false
ActiveRecord::ExplainRegistry.collect = false
SUBSCRIBER.finish(nil, nil, name: 'SQL', sql: 'select 1 from users', binds: [1, 2])
assert queries.empty?
end
def test_collects_pairs_of_queries_and_binds
sql = 'select 1 from users'
binds = [1, 2]
SUBSCRIBER.finish(nil, nil, name: 'SQL', sql: sql, binds: binds)
assert_equal 1, queries.size
assert_equal sql, queries[0][0]
assert_equal binds, queries[0][1]
end
def test_collects_nothing_if_the_statement_is_not_whitelisted
SUBSCRIBER.finish(nil, nil, name: 'SQL', sql: 'SHOW max_identifier_length')
assert queries.empty?
end
def teardown
ActiveRecord::ExplainRegistry.reset
end
def queries
ActiveRecord::ExplainRegistry.queries
end
end
end
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