/
space_around_operators_spec.rb
942 lines (816 loc) · 25.5 KB
/
space_around_operators_spec.rb
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# frozen_string_literal: true
RSpec.describe RuboCop::Cop::Layout::SpaceAroundOperators do
subject(:cop) { described_class.new(config) }
let(:config) do
RuboCop::Config
.new(
'Layout/HashAlignment' => { 'EnforcedHashRocketStyle' => hash_style },
'Layout/SpaceAroundOperators' => {
'AllowForAlignment' => allow_for_alignment,
'EnforcedStyleForExponentOperator' => exponent_operator_style
}
)
end
let(:hash_style) { 'key' }
let(:allow_for_alignment) { true }
let(:exponent_operator_style) { nil }
it 'accepts operator surrounded by tabs' do
expect_no_offenses("a\t+\tb")
end
it 'accepts operator symbols' do
expect_no_offenses('func(:-)')
end
it 'accepts ranges' do
expect_no_offenses('a, b = (1..2), (1...3)')
end
it 'accepts rational' do
expect_no_offenses('x = 2/3r')
end
it 'accepts scope operator' do
expect_no_offenses('@io.class == Zlib::GzipWriter')
end
it 'accepts ::Kernel::raise' do
expect_no_offenses('::Kernel::raise IllegalBlockError.new')
end
it 'registers an offense and corrects exclamation point negation' do
expect_offense(<<~RUBY)
x = !a&&!b
^^ Surrounding space missing for operator `&&`.
RUBY
expect_correction(<<~RUBY)
x = !a && !b
RUBY
end
it 'accepts exclamation point definition' do
expect_no_offenses(<<~RUBY)
def !
!__getobj__
end
RUBY
end
it 'accepts the result of the ExtraSpacing Cop' do
expect_no_offenses(<<~RUBY)
def batch
@areas = params[:param].map do
var_1 = 123_456
variable_2 = 456_123
end
@another = params[:param].map do
char_1 = begin
variable_1_1 = 'a'
variable_1_20 = 'b'
variable_1_300 = 'c'
# A Comment
variable_1_4000 = 'd'
variable_1_50000 = 'e'
puts 'a non-assignment statement without a blank line'
some_other_length_variable = 'f'
end
var_2 = 456_123
end
render json: @areas
end
RUBY
end
it 'accepts a unary' do
expect_no_offenses(<<~RUBY)
def bm(label_width = 0, *labels, &blk)
benchmark(CAPTION, label_width, FORMAT,
*labels, &blk)
end
def each &block
+11
end
def self.search *args
end
def each *args
end
RUBY
end
it 'accepts splat operator' do
expect_no_offenses('return *list if options')
end
it 'accepts def of operator' do
expect_no_offenses(<<~RUBY)
def +(other); end
def self.===(other); end
RUBY
end
it 'accepts an operator at the end of a line' do
expect_no_offenses(<<~RUBY)
['Favor unless over if for negative ' +
'conditions.'] * 2
RUBY
end
it 'accepts an assignment with spaces' do
expect_no_offenses('x = 0')
end
it 'accepts an assignment with the same alignment margins' do
expect_no_offenses(<<~RUBY)
@integer_message = 12345
@output = StringIO.new
@logger = Logger.new(@output)
RUBY
end
it 'accepts an assignment with a blank line' do
expect_no_offenses(<<~RUBY)
expected = posts(:welcome)
tagging = Tagging.all.merge!(includes: :taggable).find(taggings(:welcome_general).id)
assert_no_queries { assert_equal expected, tagging.taggable }
RUBY
end
it 'accepts an assignment by `for` statement' do
expect_no_offenses(<<~RUBY)
for a in [] do; end
for A in [] do; end
for @a in [] do; end
for @@a in [] do; end
RUBY
end
it 'accepts an operator called with method syntax' do
expect_no_offenses('Date.today.+(1).to_s')
end
it 'accepts operators with spaces' do
expect_no_offenses(<<~RUBY)
x += a + b - c * d / e % f ^ g | h & i || j
y -= k && l
RUBY
end
it "accepts some operators that are exceptions & don't need spaces" do
expect_no_offenses(<<~RUBY)
(1..3)
ActionController::Base
each { |s, t| }
RUBY
end
it 'accepts an assignment followed by newline' do
expect_no_offenses(<<~RUBY)
x =
0
RUBY
end
it 'accepts an operator at the beginning of a line' do
expect_no_offenses(<<~'RUBY')
a = b \
&& c
RUBY
end
it 'registers an offenses for exponent operator with spaces' do
expect_offense(<<~RUBY)
x = a * b ** 2
^^ Space around operator `**` detected.
y = a * b** 2
^^ Space around operator `**` detected.
RUBY
expect_correction(<<~RUBY)
x = a * b**2
y = a * b**2
RUBY
end
it 'accepts exponent operator without spaces' do
expect_no_offenses('x = a * b**2')
end
context 'when EnforcedStyleForExponentOperator is space' do
let(:exponent_operator_style) { 'space' }
it 'registers an offenses for exponent operator without spaces' do
expect_offense(<<~RUBY)
x = a * b**2
^^ Surrounding space missing for operator `**`.
RUBY
expect_correction(<<~RUBY)
x = a * b ** 2
RUBY
end
end
it 'accepts unary operators without space' do
expect_no_offenses(<<~RUBY)
[].map(&:size)
a.(b)
-3
arr.collect { |e| -e }
x = +2
RUBY
end
it 'accepts [arg] without space' do
expect_no_offenses('files[2]')
end
it 'accepts [] without space' do
expect_no_offenses('files[]')
end
it 'accepts []= without space' do
expect_no_offenses('files[:key], files[:another] = method')
end
it 'accepts argument default values without space' do
# These are handled by SpaceAroundEqualsInParameterDefault,
# so SpaceAroundOperators leaves them alone.
expect_no_offenses(<<~RUBY)
def init(name=nil)
end
RUBY
end
it 'accepts the construct class <<self with no space after <<' do
expect_no_offenses(<<~RUBY)
class <<self
end
RUBY
end
describe 'missing space around operators' do
shared_examples 'modifier with missing space' do |keyword|
it "registers an offense in presence of modifier #{keyword} statement" do
expect_offense(<<~RUBY)
a=1 #{keyword} condition
^ Surrounding space missing for operator `=`.
c=2
^ Surrounding space missing for operator `=`.
RUBY
expect_correction(<<~RUBY)
a = 1 #{keyword} condition
c = 2
RUBY
end
end
it 'registers an offense for assignment without space on both sides' do
expect_offense(<<~RUBY)
x=0
^ Surrounding space missing for operator `=`.
y+= 0
^^ Surrounding space missing for operator `+=`.
z[0] =0
^ Surrounding space missing for operator `=`.
RUBY
expect_correction(<<~RUBY)
x = 0
y += 0
z[0] = 0
RUBY
end
context 'ternary operators' do
it 'registers an offense and corrects operators with no spaces' do
expect_offense(<<~RUBY)
x == 0?1:2
^ Surrounding space missing for operator `:`.
^ Surrounding space missing for operator `?`.
RUBY
expect_correction(<<~RUBY)
x == 0 ? 1 : 2
RUBY
end
it 'registers an offense and corrects operators with ' \
'just a trailing space' do
expect_offense(<<~RUBY)
x == 0? 1: 2
^ Surrounding space missing for operator `:`.
^ Surrounding space missing for operator `?`.
RUBY
expect_correction(<<~RUBY)
x == 0 ? 1 : 2
RUBY
end
it 'registers an offense and corrects operators with ' \
'just a leading space' do
expect_offense(<<~RUBY)
x == 0 ?1 :2
^ Surrounding space missing for operator `:`.
^ Surrounding space missing for operator `?`.
RUBY
expect_correction(<<~RUBY)
x == 0 ? 1 : 2
RUBY
end
end
it_behaves_like 'modifier with missing space', 'if'
it_behaves_like 'modifier with missing space', 'unless'
it_behaves_like 'modifier with missing space', 'while'
it_behaves_like 'modifier with missing space', 'until'
it 'registers an offense for binary operators that could be unary' do
expect_offense(<<~RUBY)
a-3
^ Surrounding space missing for operator `-`.
x&0xff
^ Surrounding space missing for operator `&`.
z+0
^ Surrounding space missing for operator `+`.
RUBY
expect_correction(<<~RUBY)
a - 3
x & 0xff
z + 0
RUBY
end
it 'registers an offense and corrects arguments to a method' do
expect_offense(<<~RUBY)
puts 1+2
^ Surrounding space missing for operator `+`.
RUBY
expect_correction(<<~RUBY)
puts 1 + 2
RUBY
end
it 'registers an offense for operators without spaces' do
expect_offense(<<~RUBY)
x+= a+b-c*d/e%f^g|h&i||j
^^ Surrounding space missing for operator `+=`.
^ Surrounding space missing for operator `+`.
^ Surrounding space missing for operator `-`.
^ Surrounding space missing for operator `*`.
^ Surrounding space missing for operator `/`.
^ Surrounding space missing for operator `%`.
^ Surrounding space missing for operator `^`.
^ Surrounding space missing for operator `|`.
^ Surrounding space missing for operator `&`.
^^ Surrounding space missing for operator `||`.
y -=k&&l
^^ Surrounding space missing for operator `-=`.
^^ Surrounding space missing for operator `&&`.
RUBY
expect_correction(<<~RUBY)
x += a + b - c * d / e % f ^ g | h & i || j
y -= k && l
RUBY
end
it 'registers an offense and corrects a setter call without spaces' do
expect_offense(<<~RUBY)
x.y=2
^ Surrounding space missing for operator `=`.
RUBY
expect_correction(<<~RUBY)
x.y = 2
RUBY
end
context 'when a hash literal is on a single line' do
context 'and Layout/HashAlignment:EnforcedHashRocketStyle is key' do
let(:hash_style) { 'key' }
it 'registers an offense and corrects a hash rocket without spaces' do
expect_offense(<<~RUBY)
{ 1=>2, a: b }
^^ Surrounding space missing for operator `=>`.
RUBY
expect_correction(<<~RUBY)
{ 1 => 2, a: b }
RUBY
end
end
context 'and Layout/HashAlignment:EnforcedHashRocketStyle is table' do
let(:hash_style) { 'table' }
it 'registers an offense and corrects a hash rocket without spaces' do
expect_offense(<<~RUBY)
{ 1=>2, a: b }
^^ Surrounding space missing for operator `=>`.
RUBY
expect_correction(<<~RUBY)
{ 1 => 2, a: b }
RUBY
end
end
end
context 'when a hash literal is on multiple lines' do
context 'and Layout/HashAlignment:EnforcedHashRocketStyle is key' do
let(:hash_style) { 'key' }
it 'registers an offense and corrects a hash rocket without spaces' do
expect_offense(<<~RUBY)
{
1=>2,
^^ Surrounding space missing for operator `=>`.
a: b
}
RUBY
expect_correction(<<~RUBY)
{
1 => 2,
a: b
}
RUBY
end
end
context 'and Layout/HashAlignment:EnforcedHashRocketStyle is table' do
let(:hash_style) { 'table' }
it "doesn't register an offense for a hash rocket without spaces" do
expect_no_offenses(<<~RUBY)
{
1=>2,
a: b
}
RUBY
end
end
end
it 'registers an offense and corrects match operators without space' do
expect_offense(<<~RUBY)
x=~/abc/
^^ Surrounding space missing for operator `=~`.
y !~/abc/
^^ Surrounding space missing for operator `!~`.
RUBY
expect_correction(<<~RUBY)
x =~ /abc/
y !~ /abc/
RUBY
end
it 'registers an offense and corrects various assignments without space' do
expect_offense(<<~RUBY)
x||=0
^^^ Surrounding space missing for operator `||=`.
y&&=0
^^^ Surrounding space missing for operator `&&=`.
z*=2
^^ Surrounding space missing for operator `*=`.
@a=0
^ Surrounding space missing for operator `=`.
@@a=0
^ Surrounding space missing for operator `=`.
a,b=0
^ Surrounding space missing for operator `=`.
A=0
^ Surrounding space missing for operator `=`.
x[3]=0
^ Surrounding space missing for operator `=`.
$A=0
^ Surrounding space missing for operator `=`.
A||=0
^^^ Surrounding space missing for operator `||=`.
RUBY
expect_correction(<<~RUBY)
x ||= 0
y &&= 0
z *= 2
@a = 0
@@a = 0
a,b = 0
A = 0
x[3] = 0
$A = 0
A ||= 0
RUBY
end
it 'registers an offense and corrects equality operators without space' do
expect_offense(<<~RUBY)
x==0
^^ Surrounding space missing for operator `==`.
y!=0
^^ Surrounding space missing for operator `!=`.
Hash===z
^^^ Surrounding space missing for operator `===`.
RUBY
expect_correction(<<~RUBY)
x == 0
y != 0
Hash === z
RUBY
end
it 'registers an offense and corrects `-` without space with a negative ' \
'lhs operand' do
expect_offense(<<~RUBY)
-1-arg
^ Surrounding space missing for operator `-`.
RUBY
expect_correction(<<~RUBY)
-1 - arg
RUBY
end
it 'registers an offense and corrects inheritance < without space' do
expect_offense(<<~RUBY)
class ShowSourceTestClass<ShowSourceTestSuperClass
^ Surrounding space missing for operator `<`.
end
RUBY
expect_correction(<<~RUBY)
class ShowSourceTestClass < ShowSourceTestSuperClass
end
RUBY
end
it 'registers an offense and corrects hash rocket without ' \
'space at rescue' do
expect_offense(<<~RUBY)
begin
rescue Exception=>e
^^ Surrounding space missing for operator `=>`.
end
RUBY
expect_correction(<<~RUBY)
begin
rescue Exception => e
end
RUBY
end
it 'registers an offense and corrects string concatenation ' \
'without messing up new lines' do
expect_offense(<<~RUBY)
'Here is a'+
^ Surrounding space missing for operator `+`.
'joined string'+
^ Surrounding space missing for operator `+`.
'across three lines'
RUBY
expect_correction(<<~RUBY)
'Here is a' +
'joined string' +
'across three lines'
RUBY
end
it "doesn't register an offense for operators with newline on right" do
expect_no_offenses(<<~RUBY)
'Here is a' +
'joined string' +
'across three lines'
RUBY
end
end
describe 'extra space around operators' do
shared_examples 'modifier with extra space' do |keyword|
it "registers an offense in presence of modifier #{keyword} statement" do
expect_offense(<<~RUBY)
a = 1 #{keyword} condition
^ Operator `=` should be surrounded by a single space.
c = 2
^ Operator `=` should be surrounded by a single space.
RUBY
expect_correction(<<~RUBY)
a = 1 #{keyword} condition
c = 2
RUBY
end
end
it 'registers an offense and corrects assignment with ' \
'too many spaces on either side' do
expect_offense(<<~RUBY)
x = 0
^ Operator `=` should be surrounded by a single space.
y += 0
^^ Operator `+=` should be surrounded by a single space.
z[0] = 0
^ Operator `=` should be surrounded by a single space.
RUBY
expect_correction(<<~RUBY)
x = 0
y += 0
z[0] = 0
RUBY
end
it 'registers an offense and corrects ternary operator with ' \
'too many spaces' do
expect_offense(<<~RUBY)
x == 0 ? 1 : 2
^ Operator `:` should be surrounded by a single space.
^ Operator `?` should be surrounded by a single space.
RUBY
expect_correction(<<~RUBY)
x == 0 ? 1 : 2
RUBY
end
it_behaves_like 'modifier with extra space', 'if'
it_behaves_like 'modifier with extra space', 'unless'
it_behaves_like 'modifier with extra space', 'while'
it_behaves_like 'modifier with extra space', 'until'
it 'registers an offense and corrects binary operators ' \
'that could be unary' do
expect_offense(<<~RUBY)
a - 3
^ Operator `-` should be surrounded by a single space.
x & 0xff
^ Operator `&` should be surrounded by a single space.
z + 0
^ Operator `+` should be surrounded by a single space.
RUBY
expect_correction(<<~RUBY)
a - 3
x & 0xff
z + 0
RUBY
end
it 'registers an offense and corrects arguments to a method' do
expect_offense(<<~RUBY)
puts 1 + 2
^ Operator `+` should be surrounded by a single space.
RUBY
expect_correction(<<~RUBY)
puts 1 + 2
RUBY
end
it 'registers an offense and corrects operators with too many spaces' do
expect_offense(<<~RUBY)
x += a
^^ Operator `+=` should be surrounded by a single space.
a + b
^ Operator `+` should be surrounded by a single space.
b - c
^ Operator `-` should be surrounded by a single space.
c * d
^ Operator `*` should be surrounded by a single space.
d / e
^ Operator `/` should be surrounded by a single space.
e % f
^ Operator `%` should be surrounded by a single space.
f ^ g
^ Operator `^` should be surrounded by a single space.
g | h
^ Operator `|` should be surrounded by a single space.
h & i
^ Operator `&` should be surrounded by a single space.
i || j
^^ Operator `||` should be surrounded by a single space.
y -= k && l
^^ Operator `-=` should be surrounded by a single space.
^^ Operator `&&` should be surrounded by a single space.
RUBY
expect_correction(<<~RUBY)
x += a
a + b
b - c
c * d
d / e
e % f
f ^ g
g | h
h & i
i || j
y -= k && l
RUBY
end
it 'registers an offense and corrects operators with ' \
'too many spaces on the same line' do
expect_offense(<<~RUBY)
x += a + b - c * d / e % f ^ g | h & i || j
^^ Operator `||` should be surrounded by a single space.
^ Operator `&` should be surrounded by a single space.
^ Operator `|` should be surrounded by a single space.
^ Operator `^` should be surrounded by a single space.
^ Operator `%` should be surrounded by a single space.
^ Operator `/` should be surrounded by a single space.
^ Operator `*` should be surrounded by a single space.
^ Operator `-` should be surrounded by a single space.
^ Operator `+` should be surrounded by a single space.
^^ Operator `+=` should be surrounded by a single space.
y -= k && l
^^ Operator `&&` should be surrounded by a single space.
^^ Operator `-=` should be surrounded by a single space.
RUBY
expect_correction(<<~RUBY)
x += a + b - c * d / e % f ^ g | h & i || j
y -= k && l
RUBY
end
it 'registers an offense and corrects a setter call with too many spaces' do
expect_offense(<<~RUBY)
x.y = 2
^ Operator `=` should be surrounded by a single space.
RUBY
expect_correction(<<~RUBY)
x.y = 2
RUBY
end
it 'registers an offense and corrects a hash rocket with too many spaces' do
expect_offense(<<~RUBY)
{ 1 => 2, a: b }
^^ Operator `=>` should be surrounded by a single space.
RUBY
expect_correction(<<~RUBY)
{ 1 => 2, a: b }
RUBY
end
it 'registers an offense and corrects a hash rocket with an extra space' \
'on multiple line' do
expect_offense(<<~RUBY)
{
1 => 2
^^ Operator `=>` should be surrounded by a single space.
}
RUBY
expect_correction(<<~RUBY)
{
1 => 2
}
RUBY
end
it 'accepts for a hash rocket with an extra space for alignment' \
'on multiple line' do
expect_no_offenses(<<~RUBY)
{
1 => 2,
11 => 3
}
RUBY
end
context 'when does not allowed for alignment' do
let(:allow_for_alignment) { false }
it 'registers an offense and corrects an extra space' do
expect_offense(<<~RUBY)
{
1 => 2,
^^ Operator `=>` should be surrounded by a single space.
11 => 3
}
RUBY
expect_correction(<<~RUBY)
{
1 => 2,
11 => 3
}
RUBY
end
end
it 'registers an offense and corrects match operators ' \
'with too many spaces' do
expect_offense(<<~RUBY)
x =~ /abc/
^^ Operator `=~` should be surrounded by a single space.
y !~ /abc/
^^ Operator `!~` should be surrounded by a single space.
RUBY
expect_correction(<<~RUBY)
x =~ /abc/
y !~ /abc/
RUBY
end
it 'registers an offense and corrects various assignments ' \
'with too many spaces' do
expect_offense(<<~RUBY)
x ||= 0
^^^ Operator `||=` should be surrounded by a single space.
y &&= 0
^^^ Operator `&&=` should be surrounded by a single space.
z *= 2
^^ Operator `*=` should be surrounded by a single space.
@a = 0
^ Operator `=` should be surrounded by a single space.
@@a = 0
^ Operator `=` should be surrounded by a single space.
a,b = 0
^ Operator `=` should be surrounded by a single space.
A = 0
^ Operator `=` should be surrounded by a single space.
x[3] = 0
^ Operator `=` should be surrounded by a single space.
$A = 0
^ Operator `=` should be surrounded by a single space.
A ||= 0
^^^ Operator `||=` should be surrounded by a single space.
A += 0
^^ Operator `+=` should be surrounded by a single space.
RUBY
expect_correction(<<~RUBY)
x ||= 0
y &&= 0
z *= 2
@a = 0
@@a = 0
a,b = 0
A = 0
x[3] = 0
$A = 0
A ||= 0
A += 0
RUBY
end
it 'registers an offense and corrects equality operators ' \
'with too many spaces' do
expect_offense(<<~RUBY)
x == 0
^^ Operator `==` should be surrounded by a single space.
y != 0
^^ Operator `!=` should be surrounded by a single space.
Hash === z
^^^ Operator `===` should be surrounded by a single space.
RUBY
expect_correction(<<~RUBY)
x == 0
y != 0
Hash === z
RUBY
end
it 'registers an offense and corrects `-` with too many spaces with ' \
'negative lhs operand' do
expect_offense(<<~RUBY)
-1 - arg
^ Operator `-` should be surrounded by a single space.
RUBY
expect_correction(<<~RUBY)
-1 - arg
RUBY
end
it 'registers an offense and corrects inheritance < with too many spaces' do
expect_offense(<<~RUBY)
class Foo < Bar
^ Operator `<` should be surrounded by a single space.
end
RUBY
expect_correction(<<~RUBY)
class Foo < Bar
end
RUBY
end
it 'registers an offense and corrects hash rocket with ' \
'too many spaces at rescue' do
expect_offense(<<~RUBY)
begin
rescue Exception => e
^^ Operator `=>` should be surrounded by a single space.
end
RUBY
expect_correction(<<~RUBY)
begin
rescue Exception => e
end
RUBY
end
end
end