diff options
| -rw-r--r-- | .rubocop.yml | 7 | ||||
| -rwxr-xr-x | ci/custom_cops/bin/test | 5 | ||||
| -rw-r--r-- | ci/custom_cops/lib/custom_cops.rb | 3 | ||||
| -rw-r--r-- | ci/custom_cops/lib/custom_cops/refute_not.rb | 71 | ||||
| -rw-r--r-- | ci/custom_cops/test/custom_cops/refute_not_test.rb | 75 | ||||
| -rw-r--r-- | ci/custom_cops/test/support/cop_helper.rb | 35 |
6 files changed, 196 insertions, 0 deletions
diff --git a/.rubocop.yml b/.rubocop.yml index 3c765d5b1d..eb410376fe 100644 --- a/.rubocop.yml +++ b/.rubocop.yml @@ -1,3 +1,5 @@ +require: './ci/custom_cops/lib/custom_cops' + AllCops: TargetRubyVersion: 2.4 # RuboCop has a bunch of cops enabled by default. This setting tells RuboCop @@ -8,6 +10,11 @@ AllCops: - '**/vendor/**/*' - 'actionpack/lib/action_dispatch/journey/parser.rb' +# Prefer assert_not_x over refute_x +CustomCops/RefuteNot: + Include: + - '**/*_test.rb' + # Prefer &&/|| over and/or. Style/AndOr: Enabled: true diff --git a/ci/custom_cops/bin/test b/ci/custom_cops/bin/test new file mode 100755 index 0000000000..495ffec83a --- /dev/null +++ b/ci/custom_cops/bin/test @@ -0,0 +1,5 @@ +#!/usr/bin/env ruby +# frozen_string_literal: true + +COMPONENT_ROOT = File.expand_path("..", __dir__) +require_relative "../../../tools/test" diff --git a/ci/custom_cops/lib/custom_cops.rb b/ci/custom_cops/lib/custom_cops.rb new file mode 100644 index 0000000000..d5d17f8856 --- /dev/null +++ b/ci/custom_cops/lib/custom_cops.rb @@ -0,0 +1,3 @@ +# frozen_string_literal: true + +require_relative "custom_cops/refute_not" diff --git a/ci/custom_cops/lib/custom_cops/refute_not.rb b/ci/custom_cops/lib/custom_cops/refute_not.rb new file mode 100644 index 0000000000..3e89e0fd32 --- /dev/null +++ b/ci/custom_cops/lib/custom_cops/refute_not.rb @@ -0,0 +1,71 @@ +# frozen_string_literal: true + +module CustomCops + # Enforces the use of `#assert_not` methods over `#refute` methods. + # + # @example + # # bad + # refute false + # refute_empty [1, 2, 3] + # refute_equal true, false + # + # # good + # assert_not false + # assert_not_empty [1, 2, 3] + # assert_not_equal true, false + # + class RefuteNot < RuboCop::Cop::Cop + MSG = "Prefer `%<assert_method>s` over `%<refute_method>s`" + + CORRECTIONS = { + refute: "assert_not", + refute_empty: "assert_not_empty", + refute_equal: "assert_not_equal", + refute_in_delta: "assert_not_in_delta", + refute_in_epsilon: "assert_not_in_epsilon", + refute_includes: "assert_not_includes", + refute_instance_of: "assert_not_instance_of", + refute_kind_of: "assert_not_kind_of", + refute_nil: "assert_not_nil", + refute_operator: "assert_not_operator", + refute_predicate: "assert_not_predicate", + refute_respond_to: "assert_not_respond_to", + refute_same: "assert_not_same", + refute_match: "assert_no_match" + }.freeze + + OFFENSIVE_METHODS = CORRECTIONS.keys.freeze + + def_node_matcher :offensive?, "(send nil? #offensive_method? ...)" + + def on_send(node) + return unless offensive?(node) + + message = offense_message(node.method_name) + add_offense(node, location: :selector, message: message) + end + + def autocorrect(node) + ->(corrector) do + corrector.replace( + node.loc.selector, + CORRECTIONS[node.method_name] + ) + end + end + + private + + def offensive_method?(method_name) + OFFENSIVE_METHODS.include?(method_name) + end + + def offense_message(method_name) + format( + MSG, + refute_method: method_name, + assert_method: CORRECTIONS[method_name] + ) + end + end +end diff --git a/ci/custom_cops/test/custom_cops/refute_not_test.rb b/ci/custom_cops/test/custom_cops/refute_not_test.rb new file mode 100644 index 0000000000..5dbd8bf32a --- /dev/null +++ b/ci/custom_cops/test/custom_cops/refute_not_test.rb @@ -0,0 +1,75 @@ +# frozen_string_literal: true + +require "support/cop_helper" +require "./lib/custom_cops/refute_not" + +class RefuteNotTest < ActiveSupport::TestCase + include CopHelper + + setup do + @cop = CustomCops::RefuteNot.new + end + + { + refute: :assert_not, + refute_empty: :assert_not_empty, + refute_equal: :assert_not_equal, + refute_in_delta: :assert_not_in_delta, + refute_in_epsilon: :assert_not_in_epsilon, + refute_includes: :assert_not_includes, + refute_instance_of: :assert_not_instance_of, + refute_kind_of: :assert_not_kind_of, + refute_nil: :assert_not_nil, + refute_operator: :assert_not_operator, + refute_predicate: :assert_not_predicate, + refute_respond_to: :assert_not_respond_to, + refute_same: :assert_not_same, + refute_match: :assert_no_match + }.each do |refute_method, assert_method| + test "rejects `#{refute_method}` with a single argument" do + inspect_source(@cop, "#{refute_method} a") + assert_offense @cop, offense_message(refute_method, assert_method) + end + + test "rejects `#{refute_method}` with multiple arguments" do + inspect_source(@cop, "#{refute_method} a, b, c") + assert_offense @cop, offense_message(refute_method, assert_method) + end + + test "autocorrects `#{refute_method}` with a single argument" do + corrected = autocorrect_source(@cop, "#{refute_method} a") + assert_equal "#{assert_method} a", corrected + end + + test "autocorrects `#{refute_method}` with multiple arguments" do + corrected = autocorrect_source(@cop, "#{refute_method} a, b, c") + assert_equal "#{assert_method} a, b, c", corrected + end + + test "accepts `#{assert_method}` with a single argument" do + inspect_source(@cop, "#{assert_method} a") + assert_empty @cop.offenses + end + + test "accepts `#{assert_method}` with multiple arguments" do + inspect_source(@cop, "#{assert_method} a, b, c") + assert_empty @cop.offenses + end + end + + private + + def assert_offense(cop, expected_message) + assert_not_empty cop.offenses + + offense = cop.offenses.first + carets = "^" * offense.column_length + + assert_equal expected_message, "#{carets} #{offense.message}" + end + + def offense_message(refute_method, assert_method) + carets = "^" * refute_method.to_s.length + "#{carets} Prefer `#{assert_method}` over `#{refute_method}`" + end +end diff --git a/ci/custom_cops/test/support/cop_helper.rb b/ci/custom_cops/test/support/cop_helper.rb new file mode 100644 index 0000000000..d259154df5 --- /dev/null +++ b/ci/custom_cops/test/support/cop_helper.rb @@ -0,0 +1,35 @@ +# frozen_string_literal: true + +require "rubocop" + +module CopHelper + def inspect_source(cop, source) + processed_source = parse_source(source) + raise "Error parsing example code" unless processed_source.valid_syntax? + investigate(cop, processed_source) + processed_source + end + + def autocorrect_source(cop, source) + cop.instance_variable_get(:@options)[:auto_correct] = true + processed_source = inspect_source(cop, source) + rewrite(cop, processed_source) + end + + private + TARGET_RUBY_VERSION = 2.4 + + def parse_source(source) + RuboCop::ProcessedSource.new(source, TARGET_RUBY_VERSION) + end + + def rewrite(cop, processed_source) + RuboCop::Cop::Corrector.new(processed_source.buffer, cop.corrections) + .rewrite + end + + def investigate(cop, processed_source) + RuboCop::Cop::Commissioner.new([cop], [], raise_error: true) + .investigate(processed_source) + end +end |