.rubocop.yml

require:
  - rubocop-performance
  - rubocop-minitest

AllCops:
  TargetRubyVersion: 2.6
  # RuboCop has a bunch of cops enabled by default. This setting tells RuboCop
  # to ignore them, so only the ones explicitly set in this file are enabled.
  DisabledByDefault: true
  SuggestExtensions: false

# Prefer &&/|| over and/or.
Style/AndOr:
  Enabled: true

# Align `when` with `case`.
Layout/CaseIndentation:
  Enabled: true

# Align comments with method definitions.
Layout/CommentIndentation:
  Enabled: true

# No extra empty lines.
Layout/EmptyLines:
  Enabled: true

# In a regular class definition, no empty lines around the body.
Layout/EmptyLinesAroundClassBody:
  Enabled: true

# In a regular method definition, no empty lines around the body.
Layout/EmptyLinesAroundMethodBody:
  Enabled: true

# In a regular module definition, no empty lines around the body.
Layout/EmptyLinesAroundModuleBody:
  Enabled: true

# Use Ruby >= 1.9 syntax for hashes. Prefer { a: :b } over { :a => :b }.
Style/HashSyntax:
  Enabled: true

# Method definitions after `private` or `protected` isolated calls need one
# extra level of indentation.
Layout/IndentationConsistency:
  Enabled: true
  EnforcedStyle: indented_internal_methods

# Two spaces, no tabs (for indentation).
Layout/IndentationWidth:
  Enabled: true

Layout/SpaceAfterColon:
  Enabled: true

Layout/SpaceAfterComma:
  Enabled: true

Layout/SpaceAroundEqualsInParameterDefault:
  Enabled: true

Layout/SpaceAroundKeyword:
  Enabled: true

Layout/SpaceAroundOperators:
  Enabled: true

Layout/SpaceBeforeFirstArg:
  Enabled: true

# Defining a method with parameters needs parentheses.
Style/MethodDefParentheses:
  Enabled: true

# Use `foo {}` not `foo{}`.
Layout/SpaceBeforeBlockBraces:
  Enabled: true

# Use `foo { bar }` not `foo {bar}`.
Layout/SpaceInsideBlockBraces:
  Enabled: true

# Use `{ a: 1 }` not `{a:1}`.
Layout/SpaceInsideHashLiteralBraces:
  Enabled: true

Layout/SpaceInsideParens:
  Enabled: true

# Check quotes usage according to lint rule below.
Style/StringLiterals:
  Enabled: true
  EnforcedStyle: double_quotes

# Detect hard tabs, no hard tabs.
Layout/IndentationStyle:
  Enabled: true

# Blank lines should not have any spaces.
Layout/TrailingEmptyLines:
  Enabled: true

# No trailing whitespace.
Layout/TrailingWhitespace:
  Enabled: true

# Use quotes for string literals when they are enough.
Style/RedundantPercentQ:
  Enabled: true

# Align `end` with the matching keyword or starting expression except for
# assignments, where it should be aligned with the LHS.
Layout/EndAlignment:
  Enabled: true
  EnforcedStyleAlignWith: variable

# Use my_method(my_arg) not my_method( my_arg ) or my_method my_arg.
Lint/RequireParentheses:
  Enabled: true

Minitest/AssertEmpty:
  Enabled: true

Minitest/AssertEmptyLiteral:
  Enabled: true

Minitest/AssertEqual:
  Enabled: true

Minitest/AssertionInLifecycleHook:
  Enabled: true

Minitest/AssertMatch:
  Enabled: true

Minitest/AssertIncludes:
  Enabled: true

Minitest/AssertInstanceOf:
  Enabled: true

Minitest/AssertKindOf:
  Enabled: true

Minitest/AssertNil:
  Enabled: true

Minitest/AssertOutput:
  Enabled: true

Minitest/AssertPathExists:
  Enabled: true

Minitest/AssertRespondTo:
  Enabled: true

Minitest/AssertSilent:
  Enabled: true

Minitest/AssertTruthy:
  Enabled: true

Minitest/GlobalExpectations:
  Enabled: true

Minitest/LiteralAsActualArgument:
  Enabled: true

Minitest/RefuteEmpty:
  Enabled: true

Minitest/RefuteEqual:
  Enabled: true

Minitest/RefuteFalse:
  Enabled: true

Minitest/RefuteIncludes:
  Enabled: true

Minitest/RefuteMatch:
  Enabled: true

Minitest/RefuteInstanceOf:
  Enabled: true

Minitest/RefuteKindOf:
  Enabled: true

Minitest/RefuteNil:
  Enabled: true

Minitest/RefutePathExists:
  Enabled: true

Minitest/RefuteRespondTo:
  Enabled: true

Minitest/TestMethodName:
  Enabled: true

Minitest/UnspecifiedException:
  Enabled: true

# Use `bind_call(obj, args, ...)` instead of `bind(obj).call(args, ...)`.
Performance/BindCall:
  Enabled: true

# Use `caller(n..n)` instead of `caller`.
Performance/Caller:
  Enabled: true

# Use `casecmp` for case comparison.
Performance/Casecmp:
  Enabled: true

# Extract Array and Hash literals outside of loops into local variables or constants.
Performance/CollectionLiteralInLoop:
  Enabled: true

# Prefer `sort_by(&:foo)` instead of `sort { |a, b| a.foo <=> b.foo }`.
Performance/CompareWithBlock:
  Enabled: true

# Use `count` instead of `{select,find_all,filter,reject}...{size,count,length}`.
Performance/Count:
  Enabled: true

# Use `delete_prefix` instead of `gsub`.
Performance/DeletePrefix:
  Enabled: true

# Use `delete_suffix` instead of `gsub`.
Performance/DeleteSuffix:
  Enabled: true

# Use `detect` instead of `select.first`, `find_all.first`, `filter.first`, `select.last`, `find_all.last`, and `filter.last`.
Performance/Detect:
  Enabled: true

# Use `str.{start,end}_with?(x, ..., y, ...)` instead of `str.{start,end}_with?(x, ...) || str.{start,end}_with?(y, ...)`.
Performance/DoubleStartEndWith:
  Enabled: true

# Use `end_with?` instead of a regex match anchored to the end of a string.
Performance/EndWith:
  Enabled: true

# Do not compute the size of statically sized objects except in constants.
Performance/FixedSize:
  Enabled: true

# Use `Enumerable#flat_map` instead of `Enumerable#map...Array#flatten(1).
Performance/FlatMap:
  Enabled: true

# Use `key?` or `value?` instead of `keys.include?` or `values.include?`.
Performance/InefficientHashSearch:
  Enabled: true

# Use `Range#cover?` instead of `Range#include?` (or `Range#member?`).
Performance/RangeInclude:
  Enabled: true

# Use `yield` instead of `block.call`.
Performance/RedundantBlockCall:
  Enabled: true

# Use `=~` instead of `String#match` or `Regexp#match` in a context where the returned `MatchData` is not needed.
Performance/RedundantMatch:
  Enabled: true

# Use Hash#[]=, rather than Hash#merge! with a single key-value pair.
Performance/RedundantMerge:
  Enabled: true

# Use `match?` instead of `Regexp#match`, `String#match`, `Symbol#match`, `Regexp#===`, or `=~` when `MatchData` is not used.
Performance/RegexpMatch:
  Enabled: true

# Use `reverse_each` instead of `reverse.each`.
Performance/ReverseEach:
  Enabled: true

# Use `size` instead of `count` for counting the number of elements in `Array` and `Hash`.
Performance/Size:
  Enabled: true

# Use `start_with?` instead of a regex match anchored to the beginning of a string.
Performance/StartWith:
  Enabled: true

# Use `tr` instead of `gsub` when you are replacing the same number of characters.
# Use `delete` instead of `gsub` when you are deleting characters.
Performance/StringReplacement:
  Enabled: true

# Checks for .times.map calls.
Performance/TimesMap:
  Enabled: true

# Use unary plus to get an unfrozen string literal.
Performance/UnfreezeString:
  Enabled: true

# Use `URI::DEFAULT_PARSER` instead of `URI::Parser.new`.
Performance/UriDefaultParser:
  Enabled: true