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cli_options_spec.rb
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cli_options_spec.rb
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# frozen_string_literal: true
RSpec.describe RuboCop::CLI, :isolated_environment do
include_context 'cli spec behavior'
subject(:cli) { described_class.new }
let(:rubocop) { "#{RuboCop::ConfigLoader::RUBOCOP_HOME}/exe/rubocop" }
before do
RuboCop::ConfigLoader.default_configuration = nil
end
describe '--parallel' do
if RuboCop::Platform.windows?
context 'on Windows' do
it 'prints a warning' do
cli.run ['-P']
expect($stderr.string)
.to include('Process.fork is not supported by this Ruby')
end
end
else
context 'combined with AllCops:UseCache:false' do
before do
create_file('.rubocop.yml', ['AllCops:',
' UseCache: false'])
end
it 'fails with an error message' do
cli.run %w[-P]
expect($stderr.string)
.to include('-P/--parallel uses caching to speed up execution, ' \
'so combining with AllCops: UseCache: false is not ' \
'allowed.')
end
end
context 'on Unix-like systems' do
it 'prints a message if --debug is specified' do
cli.run ['--parallel', '--debug']
expect($stdout.string).to match(/Running parallel inspection/)
end
it 'does not print a message if --debug is not specified' do
cli.run ['--parallel']
expect($stdout.string).not_to match(/Running parallel inspection/)
end
end
context 'in combination with --ignore-parent-exclusion' do
before do
create_file('.rubocop.yml', ['AllCops:',
' Exclude:',
' - subdir/*'])
create_file('subdir/.rubocop.yml', ['AllCops:',
' Exclude:',
' - foobar'])
create_file('subdir/test.rb', 'puts 1')
end
it 'does ignore the exclusion in the parent directory configuration' do
Dir.chdir('subdir') do
cli.run ['--parallel', '--ignore-parent-exclusion']
end
expect($stdout.string).to match(/Inspecting 1 file/)
end
end
context 'in combination with --force-default-config' do
before do
create_file('.rubocop.yml', ['ALLCOPS:', # Faulty configuration
' Exclude:',
' - subdir/*'])
create_file('test.rb', 'puts 1')
end
it 'does not parse local configuration' do
cli.run ['--parallel', '--force-default-config']
expect($stdout.string).to match(/Inspecting 1 file/)
end
end
end
end
describe '--list-target-files' do
context 'when there are no files' do
it 'prints nothing with -L' do
cli.run ['-L']
expect($stdout.string.empty?).to be(true)
end
it 'prints nothing with --list-target-files' do
cli.run ['--list-target-files']
expect($stdout.string.empty?).to be(true)
end
end
context 'when there are some files' do
before do
create_file('show.rabl2', 'object @user => :person')
create_file('show.rabl', 'object @user => :person')
create_file('app.rb', 'puts "hello world"')
create_file('Gemfile', <<~RUBY)
source "https://rubygems.org"
gem "rubocop"
RUBY
create_file('lib/helper.rb', 'puts "helpful"')
end
context 'when there are no includes or excludes' do
it 'prints known ruby files' do
cli.run ['-L']
expect($stdout.string.split("\n")).to contain_exactly(
'app.rb', 'Gemfile', 'lib/helper.rb', 'show.rabl'
)
end
end
context 'when there is an include and exclude' do
before do
create_file('.rubocop.yml', <<~YAML)
AllCops:
Exclude:
- Gemfile
Include:
- "**/*.rb"
- "**/*.rabl"
- "**/*.rabl2"
YAML
end
it 'prints the included files and not the excluded ones' do
cli.run ['--list-target-files']
expect($stdout.string.split("\n")).to contain_exactly(
'app.rb', 'lib/helper.rb', 'show.rabl', 'show.rabl2'
)
end
end
end
end
describe '--version' do
it 'exits cleanly' do
expect(cli.run(['-v'])).to eq(0)
expect(cli.run(['--version'])).to eq(0)
expect($stdout.string).to eq("#{RuboCop::Version::STRING}\n" * 2)
end
end
describe '-V' do
it 'exits cleanly' do
expect(cli.run(['-V'])).to eq(0)
expect($stdout.string).to include(RuboCop::Version::STRING)
expect($stdout.string).to match(/Parser \d\.\d\.\d/)
expect($stdout.string).to match(/rubocop-ast \d\.\d\.\d/)
end
end
describe '--only' do
context 'when one cop is given' do
it 'runs just one cop' do
# The disable comment should not be reported as unnecessary (even if
# it is) since --only overrides configuration.
create_file('example.rb', ['# rubocop:disable LineLength',
'if x== 0 ',
"\ty",
'end'])
# IfUnlessModifier depends on the configuration of LineLength.
expect(cli.run(['--format', 'simple',
'--only', 'Style/IfUnlessModifier',
'example.rb'])).to eq(1)
expect($stdout.string)
.to eq(['== example.rb ==',
'C: 2: 1: Style/IfUnlessModifier: Favor modifier if ' \
'usage when having a single-line body. Another good ' \
'alternative is the usage of control flow &&/||.',
'',
'1 file inspected, 1 offense detected',
''].join("\n"))
end
it 'exits with error if an incorrect cop name is passed' do
create_file('example.rb', ['if x== 0 ',
"\ty",
'end'])
expect(cli.run(['--only', 'Style/123'])).to eq(2)
expect($stderr.string)
.to include('Unrecognized cop or department: Style/123.')
end
it 'displays correction candidate if an incorrect cop name is given' do
create_file('example.rb', ['x'])
expect(cli.run(['--only', 'Style/BlockComment'])).to eq(2)
expect($stderr.string)
.to include('Unrecognized cop or department: Style/BlockComment.')
expect($stderr.string)
.to include('Did you mean? Style/BlockComments')
end
it 'exits with error if an empty string is given' do
create_file('example.rb', 'x')
expect(cli.run(['--only', ''])).to eq(2)
expect($stderr.string).to include('Unrecognized cop or department: .')
end
%w[Syntax Lint/Syntax].each do |name|
it "only checks syntax if #{name} is given" do
create_file('example.rb', 'x ')
expect(cli.run(['--only', name])).to eq(0)
expect($stdout.string).to include('no offenses detected')
end
end
%w[Lint/RedundantCopDisableDirective
RedundantCopDisableDirective].each do |name|
it "exits with error if cop name #{name} is passed" do
create_file('example.rb', ['if x== 0 ',
"\ty",
'end'])
expect(cli.run(['--only', 'RedundantCopDisableDirective'])).to eq(2)
expect($stderr.string)
.to include(
'Lint/RedundantCopDisableDirective cannot be used with --only.'
)
end
end
it 'accepts cop names from plugins' do
create_file('.rubocop.yml', <<~YAML)
require: rubocop_ext
Style/SomeCop:
Description: Something
Enabled: true
YAML
create_file('rubocop_ext.rb', <<~RUBY)
module RuboCop
module Cop
module Style
class SomeCop < Cop
end
end
end
end
RUBY
create_file('redirect.rb', '$stderr = STDOUT')
rubocop = "#{RuboCop::ConfigLoader::RUBOCOP_HOME}/exe/rubocop"
# Since we define a new cop class, we have to do this in a separate
# process. Otherwise, the extra cop will affect other specs.
output =
`ruby -I . "#{rubocop}" --require redirect.rb --only Style/SomeCop`
# Excludes a warning when new `Enabled: pending` status cop is specified
# in config/default.yml.
output_excluding_warn_for_pending_cops =
output.split("\n").last(4).join("\n") << "\n"
expect(output_excluding_warn_for_pending_cops)
.to eq(<<~RESULT)
Inspecting 2 files
..
2 files inspected, no offenses detected
RESULT
end
context 'when specifying a pending cop' do
# Since we define a new cop class, we have to do this in a separate
# process. Otherwise, the extra cop will affect other specs.
let(:output) do
`ruby -I . "#{rubocop}" --require redirect.rb --only Style/SomeCop`
end
let(:pending_cop_warning) { <<~PENDING_COP_WARNING }
The following cops were added to RuboCop, but are not configured. Please set Enabled to either `true` or `false` in your `.rubocop.yml` file:
PENDING_COP_WARNING
let(:inspected_output) { <<~INSPECTED_OUTPUT }
Inspecting 2 files
..
2 files inspected, no offenses detected
INSPECTED_OUTPUT
let(:versioning_manual_url) { <<~VERSIONING_MANUAL_URL.chop }
For more information: https://docs.rubocop.org/rubocop/versioning.html
VERSIONING_MANUAL_URL
before do
create_file('rubocop_ext.rb', <<~RUBY)
module RuboCop
module Cop
module Style
class SomeCop < Cop
end
end
end
end
RUBY
create_file('redirect.rb', '$stderr = STDOUT')
end
context 'when Style department is enabled' do
let(:new_cops_option) { '' }
let(:version_added) { "VersionAdded: '0.80'" }
before do
create_file('.rubocop.yml', <<~YAML)
require: rubocop_ext
AllCops:
DefaultFormatter: progress
#{new_cops_option}
Style/SomeCop:
Description: Something
Enabled: pending
#{version_added}
YAML
end
context 'when `VersionAdded` is specified' do
it 'accepts cop names from plugins with a pending cop warning' do
expect(output).to start_with(pending_cop_warning)
expect(output).to end_with(inspected_output)
remaining_range =
pending_cop_warning.length..-(inspected_output.length + 1)
pending_cops = output[remaining_range].split("\n")
expect(pending_cops).to include(' - Style/SomeCop (0.80)')
manual_url = output[remaining_range].split("\n").last
expect(manual_url).to eq(versioning_manual_url)
end
end
context 'when `VersionAdded` is not specified' do
let(:version_added) { '' }
it 'accepts cop names from plugins with a pending cop warning' do
expect(output).to start_with(pending_cop_warning)
expect(output).to end_with(inspected_output)
remaining_range =
pending_cop_warning.length..-(inspected_output.length + 1)
pending_cops = output[remaining_range].split("\n")
expect(pending_cops).to include(' - Style/SomeCop (N/A)')
manual_url = output[remaining_range].split("\n").last
expect(manual_url).to eq(versioning_manual_url)
end
end
context 'when using `--disable-pending-cops` command-line option' do
let(:option) { '--disable-pending-cops' }
let(:output) do
`ruby -I . "#{rubocop}" --require redirect.rb #{option}`
end
it 'does not display a pending cop warning' do
expect(output).not_to start_with(pending_cop_warning)
end
end
context 'when using `--enable-pending-cops` command-line option' do
let(:option) { '--enable-pending-cops' }
let(:output) do
`ruby -I . "#{rubocop}" --require redirect.rb #{option}`
end
it 'does not display a pending cop warning' do
expect(output).not_to start_with(pending_cop_warning)
end
end
context 'when specifying `NewCops: pending` in .rubocop.yml' do
let(:new_cops_option) { 'NewCops: pending' }
let(:output) do
`ruby -I . "#{rubocop}" --require redirect.rb`
end
it 'displays a pending cop warning' do
expect(output).to start_with(pending_cop_warning)
end
end
context 'when specifying `NewCops: disable` in .rubocop.yml' do
let(:new_cops_option) { 'NewCops: disable' }
let(:output) do
`ruby -I . "#{rubocop}" --require redirect.rb`
end
it 'does not display a pending cop warning' do
expect(output).not_to start_with(pending_cop_warning)
end
end
context 'when specifying `NewCops: enable` in .rubocop.yml' do
let(:new_cops_option) { 'NewCops: enable' }
let(:output) do
`ruby -I . "#{rubocop}" --require redirect.rb`
end
it 'does not display a pending cop warning' do
expect(output).not_to start_with(pending_cop_warning)
end
end
end
context 'when Style department is disabled' do
before do
create_file('.rubocop.yml', <<~YAML)
require: rubocop_ext
Lint:
Enabled: false
Style:
Enabled: false
Layout:
Enabled: false
Style/SomeCop:
Description: Something
Enabled: pending
YAML
end
it 'does not show pending cop warning' do
expect(output).to eq(inspected_output)
end
end
end
context 'without using namespace' do
it 'runs just one cop' do
create_file('example.rb', ['if x== 0 ',
"\ty",
'end'])
expect(cli.run(['--format', 'simple',
'--display-cop-names',
'--only', 'IfUnlessModifier',
'example.rb'])).to eq(1)
expect($stdout.string)
.to eq(['== example.rb ==',
'C: 1: 1: Style/IfUnlessModifier: Favor modifier if ' \
'usage when having a single-line body. Another good ' \
'alternative is the usage of control flow &&/||.',
'',
'1 file inspected, 1 offense detected',
''].join("\n"))
end
end
it 'enables the given cop' do
create_file('example.rb',
['x = 0 ',
# Disabling comments still apply.
'# rubocop:disable Layout/TrailingWhitespace',
'y = 1 '])
create_file('.rubocop.yml', <<~YAML)
Layout/TrailingWhitespace:
Enabled: false
YAML
expect(cli.run(['--format', 'simple',
'--only', 'Layout/TrailingWhitespace',
'example.rb'])).to eq(1)
expect($stderr.string).to eq('')
expect($stdout.string)
.to eq(<<~RESULT)
== example.rb ==
C: 1: 6: Layout/TrailingWhitespace: Trailing whitespace detected.
1 file inspected, 1 offense detected
RESULT
end
end
context 'when several cops are given' do
it 'runs the given cops' do
create_file('example.rb', ['if x== 100000000000000 ',
"\ty",
'end'])
expect(cli.run(['--format', 'simple',
'--only',
'Style/IfUnlessModifier,Layout/IndentationStyle,' \
'Layout/SpaceAroundOperators',
'example.rb'])).to eq(1)
expect($stderr.string).to eq('')
expect($stdout.string).to eq(<<~RESULT)
== example.rb ==
C: 1: 1: Style/IfUnlessModifier: Favor modifier if usage when having a single-line body. Another good alternative is the usage of control flow &&/||.
C: 1: 5: Layout/SpaceAroundOperators: Surrounding space missing for operator ==.
C: 2: 1: Layout/IndentationStyle: Tab detected in indentation.
1 file inspected, 3 offenses detected
RESULT
end
context 'and --lint' do
it 'runs the given cops plus all enabled lint cops' do
create_file('example.rb', ['if x== 100000000000000 ',
"\ty = 3",
' end'])
create_file('.rubocop.yml', <<~YAML)
Layout/EndAlignment:
Enabled: false
YAML
expect(cli.run(['--format', 'simple', '--only',
'Layout/IndentationStyle,Layout/SpaceAroundOperators',
'--lint', 'example.rb'])).to eq(1)
expect($stdout.string)
.to eq(<<~RESULT)
== example.rb ==
C: 1: 5: Layout/SpaceAroundOperators: Surrounding space missing for operator ==.
C: 2: 1: Layout/IndentationStyle: Tab detected in indentation.
W: 2: 2: Lint/UselessAssignment: Useless assignment to variable - y.
1 file inspected, 3 offenses detected
RESULT
end
end
end
context 'when a namespace is given' do
it 'runs all enabled cops in that namespace' do
create_file('example.rb', ['if x== 100000000000000 ',
" #{'#' * 130}",
"\ty",
'end'])
expect(cli.run(%w[-f offenses --only Layout example.rb])).to eq(1)
expect($stdout.string).to eq(<<~RESULT)
1 Layout/CommentIndentation
1 Layout/IndentationStyle
1 Layout/IndentationWidth
1 Layout/LineLength
1 Layout/SpaceAroundOperators
1 Layout/TrailingWhitespace
--
6 Total
RESULT
end
end
context 'when three namespaces are given' do
it 'runs all enabled cops in those namespaces' do
create_file('example.rb', ['if x== 100000000000000 ',
" # #{'-' * 130}",
"\ty",
'end'])
create_file('.rubocop.yml', <<~YAML)
Layout/SpaceAroundOperators:
Enabled: false
YAML
expect(cli.run(%w[-f o --only Metrics,Style,Layout example.rb]))
.to eq(1)
expect($stdout.string)
.to eq(<<~RESULT)
1 Layout/CommentIndentation
1 Layout/IndentationStyle
1 Layout/IndentationWidth
1 Layout/LineLength
1 Layout/TrailingWhitespace
1 Style/FrozenStringLiteralComment
1 Style/NumericLiterals
--
7 Total
RESULT
end
end
context 'when a cop name is not specified' do
it 'displays how to use `--only` option' do
expect(cli.run(%w[--except -a Lint/NumberConverion])).to eq(2)
expect($stderr.string).to eq(<<~MESSAGE)
--except argument should be [COP1,COP2,...].
MESSAGE
end
end
end
describe '--except' do
context 'when one name is given' do
it 'exits with error if the cop name is incorrect' do
create_file('example.rb', ['if x== 0 ',
"\ty",
'end'])
expect(cli.run(['--except', 'Style/123'])).to eq(2)
expect($stderr.string)
.to include('Unrecognized cop or department: Style/123.')
end
it 'exits with error if an empty string is given' do
create_file('example.rb', 'x')
expect(cli.run(['--except', ''])).to eq(2)
expect($stderr.string).to include('Unrecognized cop or department: .')
end
it 'displays correction candidate if an incorrect cop name is given' do
create_file('example.rb', 'x')
expect(cli.run(['--except', 'Style/BlockComment'])).to eq(2)
expect($stderr.string)
.to include('Unrecognized cop or department: Style/BlockComment.')
expect($stderr.string)
.to include('Did you mean? Style/BlockComments')
end
%w[Syntax Lint/Syntax].each do |name|
it "exits with error if #{name} is given" do
create_file('example.rb', 'x ')
expect(cli.run(['--except', name])).to eq(2)
expect($stderr.string)
.to include('Syntax checking cannot be turned off.')
end
end
end
context 'when one cop plus one namespace are given' do
it 'runs all cops except the given' do
# The disable comment should not be reported as unnecessary (even if
# it is) since --except overrides configuration.
create_file('example.rb', ['# rubocop:disable LineLength',
'if x== 0 ',
"\ty = 3",
'end'])
expect(cli.run(['--format', 'offenses',
'--except', 'Style/IfUnlessModifier,Lint',
'example.rb'])).to eq(1)
# Note: No Lint/UselessAssignment offense.
expect($stdout.string)
.to eq(<<~RESULT)
1 Layout/IndentationStyle
1 Layout/IndentationWidth
1 Layout/SpaceAroundOperators
1 Layout/TrailingWhitespace
1 Migration/DepartmentName
1 Style/FrozenStringLiteralComment
1 Style/NumericPredicate
--
7 Total
RESULT
end
end
context 'when one cop is given without namespace' do
it 'disables the given cop' do
create_file('example.rb', ['if x== 0 ',
"\ty",
'end'])
cli.run(['--format', 'offenses',
'--except', 'Style/IfUnlessModifier',
'example.rb'])
with_option = $stdout.string
$stdout = StringIO.new
cli.run(['--format', 'offenses',
'example.rb'])
without_option = $stdout.string
expect($stderr.string).to eq('')
expect(without_option.split($RS) - with_option.split($RS))
.to eq(['1 Style/IfUnlessModifier', '7 Total'])
end
end
context 'when several cops are given' do
%w[RedundantCopDisableDirective
Lint/RedundantCopDisableDirective Lint].each do |cop_name|
it "disables the given cops including #{cop_name}" do
create_file('example.rb', ['if x== 100000000000000 ',
"\ty",
'end # rubocop:disable all'])
expect(cli.run(['--format', 'offenses',
'--except',
'Style/IfUnlessModifier,Layout/IndentationStyle,' \
"Layout/SpaceAroundOperators,#{cop_name}",
'example.rb'])).to eq(1)
if cop_name == 'RedundantCopDisableDirective'
expect($stderr.string.chomp)
.to eq('--except option: Warning: no department given for ' \
'RedundantCopDisableDirective.')
end
expect($stdout.string)
.to eq(<<~RESULT)
1 Layout/IndentationWidth
1 Layout/TrailingWhitespace
1 Style/FrozenStringLiteralComment
1 Style/NumericLiterals
--
4 Total
RESULT
end
end
end
context 'when a cop name is not specified' do
it 'displays how to use `--except` option' do
expect(cli.run(%w[--except])).to eq(2)
expect($stderr.string).to eq(<<~MESSAGE)
--except argument should be [COP1,COP2,...].
MESSAGE
end
end
end
describe '--lint' do
it 'runs only lint cops' do
create_file('example.rb',
['if 0 ',
"\ty",
"\tz # rubocop:disable Layout/IndentationStyle",
'end'])
# IfUnlessModifier depends on the configuration of LineLength.
expect(cli.run(['--format', 'simple', '--lint',
'example.rb'])).to eq(1)
expect($stdout.string)
.to eq(<<~RESULT)
== example.rb ==
W: 1: 4: Lint/LiteralAsCondition: Literal 0 appeared as a condition.
1 file inspected, 1 offense detected
RESULT
end
end
describe '-d/--debug' do
it 'shows config files' do
create_file('example1.rb', "\tputs 0")
expect(cli.run(['--debug', 'example1.rb'])).to eq(1)
home = File.dirname(File.dirname(File.dirname(File.dirname(__FILE__))))
expect($stdout.string.lines.grep(/configuration/).map(&:chomp))
.to eq(["For #{abs('')}:" \
" Default configuration from #{home}/config/default.yml"])
end
it 'shows cop names' do
create_file('example1.rb', 'puts 0 ')
file = abs('example1.rb')
expect(cli.run(['--format',
'emacs',
'--debug',
'example1.rb'])).to eq(1)
expect($stdout.string.lines.to_a[-1])
.to eq("#{file}:1:7: C: Layout/TrailingWhitespace: Trailing " \
"whitespace detected.\n")
end
end
describe '-D/--display-cop-names' do
before do
create_file('example1.rb', 'puts 0 # rubocop:disable NumericLiterals ')
end
let(:file) { abs('example1.rb') }
it 'shows cop names' do
expect(cli.run(['--format', 'emacs', '--display-cop-names',
'example1.rb'])).to eq(1)
expect($stdout.string).to eq(<<~RESULT)
#{file}:1:1: C: Style/FrozenStringLiteralComment: Missing frozen string literal comment.
#{file}:1:8: W: Lint/RedundantCopDisableDirective: Unnecessary disabling of `Style/NumericLiterals`.
#{file}:1:26: C: Migration/DepartmentName: Department name is missing.
#{file}:1:41: C: Layout/TrailingWhitespace: Trailing whitespace detected.
RESULT
end
context '--no-display-cop-names' do
it 'does not show cop names' do
expect(cli.run(['--format', 'emacs', '--no-display-cop-names',
'example1.rb'])).to eq(1)
expect($stdout.string).to eq(<<~RESULT)
#{file}:1:1: C: Missing frozen string literal comment.
#{file}:1:8: W: Unnecessary disabling of `Style/NumericLiterals`.
#{file}:1:26: C: Department name is missing.
#{file}:1:41: C: Trailing whitespace detected.
RESULT
end
end
context 'DisplayCopNames: false in .rubocop.yml' do
before do
create_file('.rubocop.yml', <<~YAML)
AllCops:
DisplayCopNames: false
YAML
end
it 'shows cop names' do
expect(cli.run(['--format', 'emacs', '--display-cop-names',
'example1.rb'])).to eq(1)
expect($stdout.string).to eq(<<~RESULT)
#{file}:1:1: C: Style/FrozenStringLiteralComment: Missing frozen string literal comment.
#{file}:1:8: W: Lint/RedundantCopDisableDirective: Unnecessary disabling of `Style/NumericLiterals`.
#{file}:1:26: C: Migration/DepartmentName: Department name is missing.
#{file}:1:41: C: Layout/TrailingWhitespace: Trailing whitespace detected.
RESULT
end
context 'without --display-cop-names' do
it 'does not show cop names' do
expect(cli.run(['--format', 'emacs', 'example1.rb'])).to eq(1)
expect($stdout.string).to eq(<<~RESULT)
#{file}:1:1: C: Missing frozen string literal comment.
#{file}:1:8: W: Unnecessary disabling of `Style/NumericLiterals`.
#{file}:1:26: C: Department name is missing.
#{file}:1:41: C: Trailing whitespace detected.
RESULT
end
end
end
end
describe '-E/--extra-details' do
it 'shows extra details' do
create_file('example1.rb',
'puts 0 # rubocop:disable Style/NumericLiterals ')
create_file('.rubocop.yml', <<~YAML)
Layout/TrailingWhitespace:
Details: Trailing space is just sloppy.
YAML
file = abs('example1.rb')
expect(cli.run(['--format', 'emacs', '--extra-details',
'example1.rb'])).to eq(1)
expect($stdout.string).to eq(<<~RESULT)
#{file}:1:1: C: Style/FrozenStringLiteralComment: Missing frozen string literal comment.
#{file}:1:8: W: Lint/RedundantCopDisableDirective: Unnecessary disabling of `Style/NumericLiterals`.
#{file}:1:47: C: Layout/TrailingWhitespace: Trailing whitespace detected. Trailing space is just sloppy.
RESULT
expect($stderr.string).to eq('')
end
end
describe '-S/--display-style-guide' do
it 'shows style guide entry' do
create_file('example1.rb', 'puts 0 ')
file = abs('example1.rb')
url =
'https://rubystyle.guide#no-trailing-whitespace'
expect(cli.run(['--format',
'emacs',
'--display-style-guide',
'example1.rb'])).to eq(1)
expect($stdout.string.lines.to_a[-1])
.to eq("#{file}:1:7: C: Layout/TrailingWhitespace: " \
"Trailing whitespace detected. (#{url})\n")
end
it 'shows reference entry' do
create_file('example1.rb', "JSON.load('{}')")
file = abs('example1.rb')
url = 'https://ruby-doc.org/stdlib-2.7.0/libdoc/json/rdoc/JSON.html' \
'#method-i-load'
expect(cli.run(['--format',
'emacs',
'--display-style-guide',
'example1.rb'])).to eq(1)
output = "#{file}:1:6: C: Security/JSONLoad: " \
"Prefer `JSON.parse` over `JSON.load`. (#{url})"
expect($stdout.string.lines.to_a[-1])
.to eq([output, ''].join("\n"))
end
it 'shows style guide and reference entries' do
create_file('example1.rb', '$foo = 1')
file = abs('example1.rb')
style_guide_link = 'https://rubystyle.guide' \
'#instance-vars'
reference_link = 'https://www.zenspider.com/ruby/quickref.html'
expect(cli.run(['--format',
'emacs',
'--display-style-guide',
'example1.rb'])).to eq(1)
output = "#{file}:1:1: C: Style/GlobalVars: " \
'Do not introduce global variables. ' \
"(#{style_guide_link}, #{reference_link})"
expect($stdout.string.lines.to_a[-1])
.to eq([output, ''].join("\n"))
end
end
describe '--show-cops' do
shared_examples('prints config') do
it 'prints the current configuration' do
out = stdout.lines.to_a
printed_config = YAML.load(out.join) # rubocop:disable Security/YAMLLoad
cop_names = (arguments[0] || '').split(',')
cop_names.each do |cop_name|
global_conf[cop_name].each do |key, value|
printed_value = printed_config[cop_name][key]
expect(printed_value).to eq(value)
end
end
end
end
let(:cops) { RuboCop::Cop::Cop.all }
let(:registry) { RuboCop::Cop::Cop.registry }
let(:global_conf) do
config_path =
RuboCop::ConfigLoader.configuration_file_for(Dir.pwd.to_s)
RuboCop::ConfigLoader.configuration_from_file(config_path)
end
let(:stdout) { $stdout.string }
before do
create_file('.rubocop.yml', <<~YAML)
Layout/LineLength:
Max: 110
YAML
# expect(cli.run(['--show-cops'] + arguments)).to eq(0)
cli.run(['--show-cops'] + arguments)
end
context 'with no args' do
let(:arguments) { [] }
# Extracts the first line out of the description
def short_description_of_cop(cop)
desc = full_description_of_cop(cop)
desc ? desc.lines.first.strip : ''
end
# Gets the full description of the cop or nil if no description is set.
def full_description_of_cop(cop)
cop_config = global_conf.for_cop(cop)
cop_config['Description']
end
it 'prints all available cops and their description' do
cops.each do |cop|
expect(stdout).to include cop.cop_name
# Because of line breaks, we will only find the beginning.
expect(stdout).to include short_description_of_cop(cop)[0..60]
end
end
it 'prints all departments' do
registry.departments.each do |department|
expect(stdout).to include(department.to_s)
end
end
it 'prints all cops in their right department listing' do
lines = stdout.lines
lines.slice_before(/Department /).each do |slice|
departments = registry.departments.map(&:to_s)
current =
departments.delete(slice.shift[/Department '(?<c>[^']+)'/, 'c'])
# all cops in their department listing
registry.with_department(current).each do |cop|
expect(slice.any? { |l| l.include? cop.cop_name }).to be_truthy
end
# no cop in wrong department listing
departments.each do |department|
registry.with_department(department).each do |cop|
expect(slice.any? { |l| l.include? cop.cop_name }).to be_falsey
end
end
end
end
include_examples 'prints config'
end
context 'with one cop given' do
let(:arguments) { ['Layout/IndentationStyle'] }