diff options
Diffstat (limited to 'activerecord/test/cases/adapters/mysql2/explain_test.rb')
| -rw-r--r-- | activerecord/test/cases/adapters/mysql2/explain_test.rb | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/activerecord/test/cases/adapters/mysql2/explain_test.rb b/activerecord/test/cases/adapters/mysql2/explain_test.rb new file mode 100644 index 0000000000..b8e778f0b0 --- /dev/null +++ b/activerecord/test/cases/adapters/mysql2/explain_test.rb @@ -0,0 +1,23 @@ +# frozen_string_literal: true + +require "cases/helper" +require "models/author" +require "models/post" + +class Mysql2ExplainTest < ActiveRecord::Mysql2TestCase + fixtures :authors + + def test_explain_for_one_query + explain = Author.where(id: 1).explain + assert_match %(EXPLAIN for: SELECT `authors`.* FROM `authors` WHERE `authors`.`id` = 1), explain + assert_match %r(authors |.* const), explain + end + + def test_explain_with_eager_loading + explain = Author.where(id: 1).includes(:posts).explain + assert_match %(EXPLAIN for: SELECT `authors`.* FROM `authors` WHERE `authors`.`id` = 1), explain + assert_match %r(authors |.* const), explain + assert_match %(EXPLAIN for: SELECT `posts`.* FROM `posts` WHERE `posts`.`author_id` = 1), explain + assert_match %r(posts |.* ALL), explain + end +end |