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require "cases/helper"
require 'models/developer'
require 'models/computer'
class MysqlExplainTest < ActiveRecord::MysqlTestCase
fixtures :developers
def test_explain_for_one_query
explain = Developer.where(id: 1).explain
assert_match %(EXPLAIN for: SELECT `developers`.* FROM `developers` WHERE `developers`.`id` = 1), explain
assert_match %r(developers |.* const), explain
end
def test_explain_with_eager_loading
explain = Developer.where(id: 1).includes(:audit_logs).explain
assert_match %(EXPLAIN for: SELECT `developers`.* FROM `developers` WHERE `developers`.`id` = 1), explain
assert_match %r(developers |.* const), explain
assert_match %(EXPLAIN for: SELECT `audit_logs`.* FROM `audit_logs` WHERE `audit_logs`.`developer_id` = 1), explain
assert_match %r(audit_logs |.* ALL), explain
end
end
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