mirror of
https://github.com/rails/rails.git
synced 2022-11-09 12:12:34 -05:00
c91c266872
This reduce the stack size which is beneficial for exceptions performance. See: https://gist.github.com/byroot/cb3bcadcc3701c2518d002fb8d3a4e7a However the cop is unsafe because it might change the block arity, so it can run into some false positives.
77 lines
2 KiB
Ruby
77 lines
2 KiB
Ruby
# frozen_string_literal: true
|
|
|
|
require "cases/helper"
|
|
require "models/car"
|
|
|
|
if ActiveRecord::Base.connection.supports_explain?
|
|
class ExplainTest < ActiveRecord::TestCase
|
|
fixtures :cars
|
|
|
|
def base
|
|
ActiveRecord::Base
|
|
end
|
|
|
|
def connection
|
|
base.connection
|
|
end
|
|
|
|
def test_relation_explain
|
|
message = Car.where(name: "honda").explain
|
|
assert_match(/^EXPLAIN for:/, message)
|
|
end
|
|
|
|
def test_collecting_queries_for_explain
|
|
queries = ActiveRecord::Base.collecting_queries_for_explain do
|
|
Car.where(name: "honda").to_a
|
|
end
|
|
|
|
sql, binds = queries[0]
|
|
assert_match "SELECT", sql
|
|
if binds.any?
|
|
assert_equal 1, binds.length
|
|
assert_equal "honda", binds.last.value
|
|
else
|
|
assert_match "honda", sql
|
|
end
|
|
end
|
|
|
|
def test_exec_explain_with_no_binds
|
|
sqls = %w(foo bar)
|
|
binds = [[], []]
|
|
queries = sqls.zip(binds)
|
|
|
|
stub_explain_for_query_plans do
|
|
expected = sqls.map { |sql| "EXPLAIN for: #{sql}\nquery plan #{sql}" }.join("\n")
|
|
assert_equal expected, base.exec_explain(queries)
|
|
end
|
|
end
|
|
|
|
def test_exec_explain_with_binds
|
|
sqls = %w(foo bar)
|
|
binds = [[bind_param("wadus", 1)], [bind_param("chaflan", 2)]]
|
|
queries = sqls.zip(binds)
|
|
|
|
stub_explain_for_query_plans(["query plan foo\n", "query plan bar\n"]) do
|
|
expected = <<~SQL
|
|
EXPLAIN for: #{sqls[0]} [["wadus", 1]]
|
|
query plan foo
|
|
|
|
EXPLAIN for: #{sqls[1]} [["chaflan", 2]]
|
|
query plan bar
|
|
SQL
|
|
assert_equal expected, base.exec_explain(queries)
|
|
end
|
|
end
|
|
|
|
private
|
|
def stub_explain_for_query_plans(query_plans = ["query plan foo", "query plan bar"], &block)
|
|
explain_called = 0
|
|
|
|
connection.stub(:explain, proc { explain_called += 1; query_plans[explain_called - 1] }, &block)
|
|
end
|
|
|
|
def bind_param(name, value)
|
|
ActiveRecord::Relation::QueryAttribute.new(name, value, ActiveRecord::Type::Value.new)
|
|
end
|
|
end
|
|
end
|