forked from rubocop/rubocop
/
shadowing_outer_local_variable_spec.rb
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/
shadowing_outer_local_variable_spec.rb
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# frozen_string_literal: true
RSpec.describe RuboCop::Cop::Lint::ShadowingOuterLocalVariable, :config do
context 'when a block argument has same name as an outer scope variable' do
it 'registers an offense' do
expect_offense(<<~RUBY)
def some_method
foo = 1
puts foo
1.times do |foo|
^^^ Shadowing outer local variable - `foo`.
end
end
RUBY
end
end
context 'when a splat block argument has same name as an outer scope variable' do
it 'registers an offense' do
expect_offense(<<~RUBY)
def some_method
foo = 1
puts foo
1.times do |*foo|
^^^^ Shadowing outer local variable - `foo`.
end
end
RUBY
end
end
context 'when a block block argument has same name as an outer scope variable' do
it 'registers an offense' do
expect_offense(<<~RUBY)
def some_method
foo = 1
puts foo
proc_taking_block = proc do |&foo|
^^^^ Shadowing outer local variable - `foo`.
end
proc_taking_block.call do
end
end
RUBY
end
end
context 'when a block local variable has same name as an outer scope variable' do
it 'registers an offense' do
expect_offense(<<~RUBY)
def some_method
foo = 1
puts foo
1.times do |i; foo|
^^^ Shadowing outer local variable - `foo`.
puts foo
end
end
RUBY
end
end
context 'when a block local variable has same name as an outer scope variable' \
'with same branches of same `if` condition node not in the method definition' do
it 'registers an offense' do
expect_offense(<<~RUBY)
if condition?
foo = 1
puts foo
bar.each do |foo|
^^^ Shadowing outer local variable - `foo`.
end
else
bar.each do |foo|
end
end
RUBY
end
end
context 'when a block local variable has same name as an outer scope variable' \
'with same branches of same `if` condition node' do
it 'registers an offense' do
expect_offense(<<~RUBY)
def some_method
if condition?
foo = 1
puts foo
bar.each do |foo|
^^^ Shadowing outer local variable - `foo`.
end
else
bar.each do |foo|
end
end
end
RUBY
end
end
context 'when a block local variable has same name as an outer scope variable' \
'with same branches of same nested `if` condition node' do
it 'registers an offense' do
expect_offense(<<~RUBY)
def some_method
if condition?
foo = 1
puts foo
if other_condition?
bar.each do |foo|
^^^ Shadowing outer local variable - `foo`.
end
end
else
bar.each do |foo|
end
end
end
RUBY
end
end
context 'when a block local variable has same name as an outer scope variable' \
'with same branches of same `unless` condition node' do
it 'registers an offense' do
expect_offense(<<~RUBY)
def some_method
unless condition?
foo = 1
puts foo
bar.each do |foo|
^^^ Shadowing outer local variable - `foo`.
end
else
bar.each do |foo|
end
end
end
RUBY
end
end
context 'when a block local variable has same name as an outer scope variable' \
'with same branches of same `case` condition node' do
it 'registers an offense' do
expect_offense(<<~RUBY)
def some_method
case condition
when foo then
foo = 1
puts foo
bar.each do |foo|
^^^ Shadowing outer local variable - `foo`.
end
else
bar.each do |foo|
end
end
end
RUBY
end
end
context 'when a block local variable has same name as an outer scope variable' \
'with different branches of same `if` condition node' do
it 'does not register an offense' do
expect_no_offenses(<<~RUBY)
def some_method
if condition?
foo = 1
else
bar.each do |foo|
end
end
end
RUBY
end
end
context 'when a block local variable has same name as an outer scope variable' \
'with different branches of same `unless` condition node' do
it 'does not register an offense' do
expect_no_offenses(<<~RUBY)
def some_method
unless condition?
foo = 1
else
bar.each do |foo|
end
end
end
RUBY
end
end
context 'when a block local variable has same name as an outer scope variable' \
'with different branches of same `case` condition node' do
it 'does not register an offense' do
expect_no_offenses(<<~RUBY)
def some_method
case condition
when foo then
foo = 1
else
bar.each do |foo|
end
end
end
RUBY
end
end
context 'when a block argument has different name with outer scope variables' do
it 'does not register an offense' do
expect_no_offenses(<<~RUBY)
def some_method
foo = 1
puts foo
1.times do |bar|
end
end
RUBY
end
end
context 'when an outer scope variable is reassigned in a block' do
it 'does not register an offense' do
expect_no_offenses(<<~RUBY)
def some_method
foo = 1
puts foo
1.times do
foo = 2
end
end
RUBY
end
end
context 'when an outer scope variable is referenced in a block' do
it 'does not register an offense' do
expect_no_offenses(<<~RUBY)
def some_method
foo = 1
puts foo
1.times do
puts foo
end
end
RUBY
end
end
context 'when multiple block arguments have same name "_"' do
it 'does not register an offense' do
expect_no_offenses(<<~RUBY)
def some_method
1.times do |_, foo, _|
end
end
RUBY
end
end
context 'when multiple block arguments have a same name starts with "_"' do
it 'does not register an offense' do
expect_no_offenses(<<~RUBY)
def some_method
1.times do |_foo, bar, _foo|
end
end
RUBY
end
end
context 'when a block argument has same name "_" as outer scope variable "_"' do
it 'does not register an offense' do
expect_no_offenses(<<~RUBY)
def some_method
_ = 1
puts _
1.times do |_|
end
end
RUBY
end
end
context 'when a block argument has a same name starts with "_" as an outer scope variable' do
it 'does not register an offense' do
expect_no_offenses(<<~RUBY)
def some_method
_foo = 1
puts _foo
1.times do |_foo|
end
end
RUBY
end
end
context 'when a method argument has same name as an outer scope variable' do
it 'does not register an offense' do
expect_no_offenses(<<~RUBY)
class SomeClass
foo = 1
puts foo
def some_method(foo)
end
end
RUBY
end
end
context 'with Ractor.new' do
it 'does not register an offense' do
expect_no_offenses(<<~RUBY)
def foo(*args)
Ractor.new(*args) do |*args|
end
end
RUBY
end
end
end