diff options
Diffstat (limited to 'activerecord/test/cases/adapters/mysql/explain_test.rb')
| -rw-r--r-- | activerecord/test/cases/adapters/mysql/explain_test.rb | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/activerecord/test/cases/adapters/mysql/explain_test.rb b/activerecord/test/cases/adapters/mysql/explain_test.rb new file mode 100644 index 0000000000..c44c1e6648 --- /dev/null +++ b/activerecord/test/cases/adapters/mysql/explain_test.rb @@ -0,0 +1,21 @@ +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 |