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author | GitLab Bot <gitlab-bot@gitlab.com> | 2020-04-14 18:09:44 +0300 |
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committer | GitLab Bot <gitlab-bot@gitlab.com> | 2020-04-14 18:09:44 +0300 |
commit | 874ead9c3a50de4c4ca4551eaf5b7eb976d26b50 (patch) | |
tree | 637ee9f2da5e251bc08ebf3e972209d51966bf7c /spec/rubocop/cop/performance | |
parent | 2e4c4055181eec9186458dd5dd3219c937032ec7 (diff) |
Add latest changes from gitlab-org/gitlab@master
Diffstat (limited to 'spec/rubocop/cop/performance')
-rw-r--r-- | spec/rubocop/cop/performance/ar_count_each_spec.rb | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/spec/rubocop/cop/performance/ar_count_each_spec.rb b/spec/rubocop/cop/performance/ar_count_each_spec.rb new file mode 100644 index 00000000000..f934a1fde48 --- /dev/null +++ b/spec/rubocop/cop/performance/ar_count_each_spec.rb @@ -0,0 +1,62 @@ +# frozen_string_literal: true + +require 'fast_spec_helper' +require_relative '../../../support/helpers/expect_offense' +require_relative '../../../../rubocop/cop/performance/ar_count_each.rb' + +describe RuboCop::Cop::Performance::ARCountEach do + include CopHelper + include ExpectOffense + + subject(:cop) { described_class.new } + + context 'when it is not haml file' do + it 'does not flag it as an offense' do + expect(subject).to receive(:in_haml_file?).with(anything).at_least(:once).and_return(false) + + expect_no_offenses <<~SOURCE + show(@users.count) + @users.each { |user| display(user) } + SOURCE + end + end + + context 'when it is haml file' do + before do + expect(subject).to receive(:in_haml_file?).with(anything).at_least(:once).and_return(true) + end + + context 'when the same object uses count and each' do + it 'flags it as an offense' do + expect_offense <<~SOURCE + show(@users.count) + ^^^^^^^^^^^^ If @users is AR relation, avoid `@users.count ...; @users.each... `, this will trigger two queries. Use `@users.load.size ...; @users.each... ` instead. If @users is an array, try to use @users.size. + @users.each { |user| display(user) } + SOURCE + + expect(cop.offenses.map(&:cop_name)).to contain_exactly('Performance/ARCountEach') + end + end + + context 'when different object uses count and each' do + it 'does not flag it as an offense' do + expect_no_offenses <<~SOURCE + show(@emails.count) + @users.each { |user| display(user) } + SOURCE + end + end + + context 'when just using count without each' do + it 'does not flag it as an offense' do + expect_no_offenses '@users.count' + end + end + + context 'when just using each without count' do + it 'does not flag it as an offense' do + expect_no_offenses '@users.each { |user| display(user) }' + end + end + end +end |