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# frozen_string_literal: true
require 'spec_helper'
RSpec.describe ExceedQueryLimitHelpers do
before do
stub_const('TestQueries', Class.new(ActiveRecord::Base))
stub_const('TestMatcher', Class.new)
TestQueries.class_eval do
self.table_name = 'schema_migrations'
end
TestMatcher.class_eval do
include ExceedQueryLimitHelpers
def expected
ActiveRecord::QueryRecorder.new do
2.times { TestQueries.count }
end
end
end
end
describe '#diff_query_group_message' do
it 'prints a group helpfully' do
test_matcher = TestMatcher.new
suffixes = {
'WHERE x = z' => [1, 1],
'WHERE x = y' => [1, 2],
'LIMIT 1' => [1, 0]
}
message = test_matcher.diff_query_group_message('SELECT * FROM foo', suffixes)
expect(message).to eq(<<~MSG.chomp)
SELECT * FROM foo...
-- (expected: 1, got: 1)
WHERE x = z
-- (expected: 1, got: 2)
WHERE x = y
-- (expected: 1, got: 0)
LIMIT 1
MSG
end
end
describe '#diff_query_counts' do
let(:expected) do
ActiveRecord::QueryRecorder.new do
TestQueries.where(version: 'foobar').to_a
TestQueries.where(version: 'also foobar and baz').to_a
TestQueries.count
TestQueries.first
TestQueries.where(version: 'foobar').to_a
TestQueries.where(version: 'x').update_all(version: 'y')
TestQueries.where(version: 'foobar').count
TestQueries.where(version: 'z').delete_all
Project.where(id: 1).pluck(:title)
end
end
let(:actual) do
ActiveRecord::QueryRecorder.new do
TestQueries.where(version: 'foobar').to_a
TestQueries.where(version: 'also foobar and baz').to_a
TestQueries.count
TestQueries.create!(version: 'x')
TestQueries.where(version: 'foobar').to_a
TestQueries.where(version: 'x').update_all(version: 'y')
TestQueries.where(version: 'foobar').count
TestQueries.count
TestQueries.where(version: 'y').update_all(version: 'z')
TestQueries.where(version: 'z').delete_all
Project.where(id: 2).pluck(:title)
end
end
it 'merges two query counts, showing only diffs' do
test_matcher = TestMatcher.new
diff = test_matcher.diff_query_counts(
test_matcher.count_queries(expected),
test_matcher.count_queries(actual)
)
expect(diff).to eq({
"SELECT \"schema_migrations\".* FROM \"schema_migrations\"" => {
"ORDER BY \"schema_migrations\".\"version\" ASC LIMIT 1" => [1, 0]
},
"SELECT COUNT(*) FROM \"schema_migrations\"" => { "" => [1, 2] },
"UPDATE \"schema_migrations\"" => {
"SET \"version\" = 'z' WHERE \"schema_migrations\".\"version\" = 'y'" => [0, 1]
},
"SAVEPOINT active_record_1" => { "" => [0, 1] },
"INSERT INTO \"schema_migrations\" (\"version\")" => {
"VALUES ('x') RETURNING \"version\"" => [0, 1]
},
"RELEASE SAVEPOINT active_record_1" => { "" => [0, 1] }
})
end
it 'can show common queries if so desired' do
test_matcher = TestMatcher.new.show_common_queries
diff = test_matcher.diff_query_counts(
test_matcher.count_queries(expected),
test_matcher.count_queries(actual)
)
expect(diff).to eq({
"SELECT \"schema_migrations\".* FROM \"schema_migrations\"" => {
"WHERE \"schema_migrations\".\"version\" = 'foobar'" => [2, 2],
"WHERE \"schema_migrations\".\"version\" = 'also foobar and baz'" => [1, 1],
"ORDER BY \"schema_migrations\".\"version\" ASC LIMIT 1" => [1, 0]
},
"SELECT COUNT(*) FROM \"schema_migrations\"" => {
"" => [1, 2],
"WHERE \"schema_migrations\".\"version\" = 'foobar'" => [1, 1]
},
"UPDATE \"schema_migrations\"" => {
"SET \"version\" = 'y' WHERE \"schema_migrations\".\"version\" = 'x'" => [1, 1],
"SET \"version\" = 'z' WHERE \"schema_migrations\".\"version\" = 'y'" => [0, 1]
},
"DELETE FROM \"schema_migrations\"" => {
"WHERE \"schema_migrations\".\"version\" = 'z'" => [1, 1]
},
"SAVEPOINT active_record_1" => {
"" => [0, 1]
},
"INSERT INTO \"schema_migrations\" (\"version\")" => {
"VALUES ('x') RETURNING \"version\"" => [0, 1]
},
"RELEASE SAVEPOINT active_record_1" => {
"" => [0, 1]
},
"SELECT \"projects\".\"name\" FROM \"projects\"" => {
"WHERE \"projects\".\"id\" = 1" => [1, 0],
"WHERE \"projects\".\"id\" = 2" => [0, 1]
}
})
end
end
describe '#count_queries' do
it 'handles queries with suffixes over multiple lines' do
test_matcher = TestMatcher.new
recorder = ActiveRecord::QueryRecorder.new do
TestQueries.find_by(version: %w[foo bar baz].join("\n"))
TestQueries.find_by(version: %w[foo biz baz].join("\n"))
TestQueries.find_by(version: %w[foo bar baz].join("\n"))
end
recorder.count
expect(test_matcher.count_queries(recorder)).to eq({
'SELECT "schema_migrations".* FROM "schema_migrations"' => {
%(WHERE "schema_migrations"."version" = 'foo\nbar\nbaz' LIMIT 1) => 2,
%(WHERE "schema_migrations"."version" = 'foo\nbiz\nbaz' LIMIT 1) => 1
}
})
end
it 'can aggregate queries' do
test_matcher = TestMatcher.new
recorder = ActiveRecord::QueryRecorder.new do
TestQueries.where(version: 'foobar').to_a
TestQueries.where(version: 'also foobar and baz').to_a
TestQueries.count
TestQueries.create!(version: 'x')
TestQueries.first
TestQueries.where(version: 'foobar').to_a
TestQueries.where(version: 'x').update_all(version: 'y')
TestQueries.where(version: 'foobar').count
TestQueries.count
TestQueries.where(version: 'y').update_all(version: 'z')
TestQueries.where(version: 'z').delete_all
end
recorder.count
expect(test_matcher.count_queries(recorder)).to eq({
'SELECT "schema_migrations".* FROM "schema_migrations"' => {
%q(WHERE "schema_migrations"."version" = 'foobar') => 2,
%q(WHERE "schema_migrations"."version" = 'also foobar and baz') => 1,
%q(ORDER BY "schema_migrations"."version" ASC LIMIT 1) => 1
},
'SELECT COUNT(*) FROM "schema_migrations"' => {
"" => 2,
%q(WHERE "schema_migrations"."version" = 'foobar') => 1
},
'SAVEPOINT active_record_1' => { "" => 1 },
'INSERT INTO "schema_migrations" ("version")' => {
%q[VALUES ('x') RETURNING "version"] => 1
},
'RELEASE SAVEPOINT active_record_1' => { "" => 1 },
'UPDATE "schema_migrations"' => {
%q(SET "version" = 'y' WHERE "schema_migrations"."version" = 'x') => 1,
%q(SET "version" = 'z' WHERE "schema_migrations"."version" = 'y') => 1
},
'DELETE FROM "schema_migrations"' => {
%q(WHERE "schema_migrations"."version" = 'z') => 1
}
})
end
end
it 'can count queries' do
test_matcher = TestMatcher.new
test_matcher.verify_count do
TestQueries.where(version: 'foobar').to_a
TestQueries.where(version: 'also foobar and baz').to_a
TestQueries.first
TestQueries.count
end
expect(test_matcher.actual_count).to eq(4)
end
it 'can select specific queries' do
test_matcher = TestMatcher.new.for_query(/foobar/)
test_matcher.verify_count do
TestQueries.where(version: 'foobar').to_a
TestQueries.where(version: 'also foobar and baz').to_a
TestQueries.first
TestQueries.count
end
expect(test_matcher.actual_count).to eq(2)
end
it 'can filter specific models' do
test_matcher = TestMatcher.new.for_model(TestQueries)
test_matcher.verify_count do
TestQueries.first
TestQueries.connection.execute('select 1')
end
expect(test_matcher.actual_count).to eq(1)
end
it 'can ignore specific queries' do
test_matcher = TestMatcher.new.ignoring(/foobar/)
test_matcher.verify_count do
TestQueries.where(version: 'foobar').to_a
TestQueries.where(version: 'also foobar and baz').to_a
TestQueries.first
end
expect(test_matcher.actual_count).to eq(1)
end
it 'can perform inclusion and exclusion' do
test_matcher = TestMatcher.new.for_query(/foobar/).ignoring(/baz/)
test_matcher.verify_count do
TestQueries.where(version: 'foobar').to_a
TestQueries.where(version: 'also foobar and baz').to_a
TestQueries.first
TestQueries.count
end
expect(test_matcher.actual_count).to eq(1)
end
it 'does not contain marginalia annotations' do
test_matcher = TestMatcher.new
test_matcher.verify_count do
2.times { TestQueries.count }
TestQueries.first
end
aggregate_failures do
expect(test_matcher.log_message)
.to match(%r{ORDER BY.*#{TestQueries.table_name}.*LIMIT 1})
expect(test_matcher.log_message)
.not_to match(%r{/\*.*correlation_id.*\*/})
end
end
end
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