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conditional_assignment_assign_in_condition_spec.rb
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conditional_assignment_assign_in_condition_spec.rb
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# frozen_string_literal: true
RSpec.describe RuboCop::Cop::Style::ConditionalAssignment, :config do
shared_examples 'all variable types' do |variable|
it 'registers an offense assigning any variable type to ternary' do
expect_offense(<<~RUBY, variable: variable)
%{variable} = foo? ? 1 : 2
^{variable}^^^^^^^^^^^^^^^ Assign variables inside of conditionals
RUBY
expect_correction(<<~RUBY)
foo? ? #{variable} = 1 : #{variable} = 2
RUBY
end
it 'registers an offense assigning any variable type to if else' do
expect_offense(<<~RUBY, variable: variable)
%{variable} = if foo
^{variable}^^^^^^^^^ Assign variables inside of conditionals
1
else
2
end
RUBY
expect_correction(<<~RUBY)
if foo
#{variable} = 1
else
#{variable} = 2
end
RUBY
end
it 'registers an offense assigning any variable type to if elsif else' do
expect_offense(<<~RUBY, variable: variable)
%{variable} = if foo
^{variable}^^^^^^^^^ Assign variables inside of conditionals
1
elsif baz
2
else
3
end
RUBY
expect_correction(<<~RUBY)
if foo
#{variable} = 1
elsif baz
#{variable} = 2
else
#{variable} = 3
end
RUBY
end
it 'registers an offense assigning any variable type to if elsewith multiple assignment' do
expect_offense(<<~RUBY, variable: variable)
%{variable}, %{variable} = if foo
^{variable}^^^{variable}^^^^^^^^^ Assign variables inside of conditionals
something
else
something_else
end
RUBY
expect_correction(<<~RUBY)
if foo
#{variable}, #{variable} = something
else
#{variable}, #{variable} = something_else
end
RUBY
end
it 'allows assignment to if without else' do
expect_no_offenses(<<~RUBY)
#{variable} = if foo
1
end
RUBY
end
it 'registers an offense assigning any variable type to unless else' do
expect_offense(<<~RUBY, variable: variable)
%{variable} = unless foo
^{variable}^^^^^^^^^^^^^ Assign variables inside of conditionals
1
else
2
end
RUBY
expect_correction(<<~RUBY)
unless foo
#{variable} = 1
else
#{variable} = 2
end
RUBY
end
it 'registers an offense for assigning any variable type to case when' do
expect_offense(<<~RUBY, variable: variable)
%{variable} = case foo
^{variable}^^^^^^^^^^^ Assign variables inside of conditionals
when "a"
1
when "b"
2
else
3
end
RUBY
expect_correction(<<~RUBY)
case foo
when "a"
#{variable} = 1
when "b"
#{variable} = 2
else
#{variable} = 3
end
RUBY
end
context '>= Ruby 2.7', :ruby27 do
it 'registers an offense for assigning any variable type to case in' do
expect_offense(<<~RUBY, variable: variable)
%{variable} = case foo
^{variable}^^^^^^^^^^^ Assign variables inside of conditionals
in "a"
1
in "b"
2
else
3
end
RUBY
expect_correction(<<~RUBY)
case foo
in "a"
#{variable} = 1
in "b"
#{variable} = 2
else
#{variable} = 3
end
RUBY
end
end
it 'does not crash for rescue assignment' do
expect_no_offenses(<<~RUBY)
begin
foo
rescue => #{variable}
bar
end
RUBY
end
end
shared_examples 'all assignment types' do |assignment|
it 'registers an offense for any assignment to ternary' do
expect_offense(<<~RUBY, assignment: assignment)
bar %{assignment} (foo? ? 1 : 2)
^^^^^{assignment}^^^^^^^^^^^^^^^ Assign variables inside of conditionals
RUBY
expect_correction(<<~RUBY)
foo? ? bar #{assignment} 1 : bar #{assignment} 2
RUBY
end
it 'registers an offense any assignment to if else' do
expect_offense(<<~RUBY, assignment: assignment)
bar %{assignment} if foo
^^^^^{assignment}^^^^^^^ Assign variables inside of conditionals
1
else
2
end
RUBY
expect_correction(<<~RUBY)
if foo
bar #{assignment} 1
else
bar #{assignment} 2
end
RUBY
end
it 'allows any assignment to if without else' do
expect_no_offenses(<<~RUBY)
bar #{assignment} if foo
1
end
RUBY
end
it 'registers an offense for any assignment to unless else' do
expect_offense(<<~RUBY, assignment: assignment)
bar %{assignment} unless foo
^^^^^{assignment}^^^^^^^^^^^ Assign variables inside of conditionals
1
else
2
end
RUBY
expect_correction(<<~RUBY)
unless foo
bar #{assignment} 1
else
bar #{assignment} 2
end
RUBY
end
it 'registers an offense any assignment to case when' do
expect_offense(<<~RUBY, assignment: assignment)
bar %{assignment} case foo
^^^^^{assignment}^^^^^^^^^ Assign variables inside of conditionals
when "a"
1
else
2
end
RUBY
expect_correction(<<~RUBY)
case foo
when "a"
bar #{assignment} 1
else
bar #{assignment} 2
end
RUBY
end
it 'does not crash when used inside rescue' do
expect_no_offenses(<<~RUBY)
begin
bar #{assignment} 2
rescue
bar #{assignment} 1
end
RUBY
end
end
shared_examples 'multiline all variable types offense' do |variable|
it 'assigning any variable type to a multiline if else' do
expect_offense(<<~RUBY, variable: variable)
%{variable} = if foo
^{variable}^^^^^^^^^ Assign variables inside of conditionals
something
1
else
something_else
2
end
RUBY
expect_correction(<<~RUBY)
if foo
something
#{variable} = 1
else
something_else
#{variable} = 2
end
RUBY
end
it 'assigning any variable type to an if else with multiline in one branch' do
expect_offense(<<~RUBY, variable: variable)
%{variable} = if foo
^{variable}^^^^^^^^^ Assign variables inside of conditionals
1
else
something_else
2
end
RUBY
expect_correction(<<~RUBY)
if foo
#{variable} = 1
else
something_else
#{variable} = 2
end
RUBY
end
it 'assigning any variable type to a multiline if elsif else' do
expect_offense(<<~RUBY, variable: variable)
%{variable} = if foo
^{variable}^^^^^^^^^ Assign variables inside of conditionals
something
1
elsif bar
something_other
2
elsif baz
something_other_again
3
else
something_else
4
end
RUBY
expect_correction(<<~RUBY)
if foo
something
#{variable} = 1
elsif bar
something_other
#{variable} = 2
elsif baz
something_other_again
#{variable} = 3
else
something_else
#{variable} = 4
end
RUBY
end
it 'assigning any variable type to a multiline unless else' do
expect_offense(<<~RUBY, variable: variable)
%{variable} = unless foo
^{variable}^^^^^^^^^^^^^ Assign variables inside of conditionals
something
1
else
something_else
2
end
RUBY
expect_correction(<<~RUBY)
unless foo
something
#{variable} = 1
else
something_else
#{variable} = 2
end
RUBY
end
it 'assigning any variable type to a multiline case when' do
expect_offense(<<~RUBY, variable: variable)
%{variable} = case foo
^{variable}^^^^^^^^^^^ Assign variables inside of conditionals
when "a"
something
1
else
something_else
2
end
RUBY
expect_correction(<<~RUBY)
case foo
when "a"
something
#{variable} = 1
else
something_else
#{variable} = 2
end
RUBY
end
end
shared_examples 'multiline all variable types allow' do |variable|
it 'assigning any variable type to a multiline if else' do
expect_no_offenses(<<~RUBY)
#{variable} = if foo
something
1
else
something_else
2
end
RUBY
end
it 'assigning any variable type to an if else with multiline in one branch' do
expect_no_offenses(<<~RUBY)
#{variable} = if foo
1
else
something_else
2
end
RUBY
end
it 'assigning any variable type to a multiline if elsif else' do
expect_no_offenses(<<~RUBY)
#{variable} = if foo
something
1
elsif
something_other
2
elsif
something_other_again
3
else
something_else
4
end
RUBY
end
it 'assigning any variable type to a multiline unless else' do
expect_no_offenses(<<~RUBY)
#{variable} = unless foo
something
1
else
something_else
2
end
RUBY
end
it 'assigning any variable type to a multiline case when' do
expect_no_offenses(<<~RUBY)
#{variable} = case foo
when "a"
something
1
else
something_else
2
end
RUBY
end
end
shared_examples 'multiline all assignment types offense' do |assignment|
it 'any assignment to a multiline if else' do
expect_offense(<<~RUBY, assignment: assignment)
bar %{assignment} if foo
^^^^^{assignment}^^^^^^^ Assign variables inside of conditionals
something
1
else
something_else
2
end
RUBY
expect_correction(<<~RUBY)
if foo
something
bar #{assignment} 1
else
something_else
bar #{assignment} 2
end
RUBY
end
it 'any assignment to a multiline unless else' do
expect_offense(<<~RUBY, assignment: assignment)
bar %{assignment} unless foo
^^^^^{assignment}^^^^^^^^^^^ Assign variables inside of conditionals
something
1
else
something_else
2
end
RUBY
expect_correction(<<~RUBY)
unless foo
something
bar #{assignment} 1
else
something_else
bar #{assignment} 2
end
RUBY
end
it 'any assignment to a multiline case when' do
expect_offense(<<~RUBY, assignment: assignment)
bar %{assignment} case foo
^^^^^{assignment}^^^^^^^^^ Assign variables inside of conditionals
when "a"
something
1
else
something_else
2
end
RUBY
expect_correction(<<~RUBY)
case foo
when "a"
something
bar #{assignment} 1
else
something_else
bar #{assignment} 2
end
RUBY
end
end
shared_examples 'multiline all assignment types allow' do |assignment|
it 'any assignment to a multiline if else' do
expect_no_offenses(<<~RUBY)
bar #{assignment} if foo
something
1
else
something_else
2
end
RUBY
end
it 'any assignment to a multiline unless else' do
expect_no_offenses(<<~RUBY)
bar #{assignment} unless foo
something
1
else
something_else
2
end
RUBY
end
it 'any assignment to a multiline case when' do
expect_no_offenses(<<~RUBY)
bar #{assignment} case foo
when "a"
something
1
else
something_else
2
end
RUBY
end
end
shared_examples 'single line condition autocorrect' do
it 'corrects assignment to an if else condition' do
expect_offense(<<~RUBY)
bar = if foo
^^^^^^^^^^^^ Assign variables inside of conditionals
1
else
2
end
RUBY
expect_correction(<<~RUBY)
if foo
bar = 1
else
bar = 2
end
RUBY
end
it 'corrects assignment to an if elsif else condition' do
expect_offense(<<~RUBY)
bar = if foo
^^^^^^^^^^^^ Assign variables inside of conditionals
1
elsif foobar
2
else
3
end
RUBY
expect_correction(<<~RUBY)
if foo
bar = 1
elsif foobar
bar = 2
else
bar = 3
end
RUBY
end
it 'corrects assignment to an if elsif else with multiple elsifs' do
expect_offense(<<~RUBY)
bar = if foo
^^^^^^^^^^^^ Assign variables inside of conditionals
1
elsif foobar
2
elsif baz
3
else
4
end
RUBY
expect_correction(<<~RUBY)
if foo
bar = 1
elsif foobar
bar = 2
elsif baz
bar = 3
else
bar = 4
end
RUBY
end
it 'corrects assignment to an unless else condition' do
expect_offense(<<~RUBY)
bar = unless foo
^^^^^^^^^^^^^^^^ Assign variables inside of conditionals
1
else
2
end
RUBY
expect_correction(<<~RUBY)
unless foo
bar = 1
else
bar = 2
end
RUBY
end
it 'corrects assignment to a case when else condition' do
expect_offense(<<~RUBY)
bar = case foo
^^^^^^^^^^^^^^ Assign variables inside of conditionals
when foobar
1
else
2
end
RUBY
expect_correction(<<~RUBY)
case foo
when foobar
bar = 1
else
bar = 2
end
RUBY
end
it 'corrects assignment to a case when else with multiple whens' do
expect_offense(<<~RUBY)
bar = case foo
^^^^^^^^^^^^^^ Assign variables inside of conditionals
when foobar
1
when baz
2
else
3
end
RUBY
expect_correction(<<~RUBY)
case foo
when foobar
bar = 1
when baz
bar = 2
else
bar = 3
end
RUBY
end
it 'corrects assignment to a ternary operator' do
expect_offense(<<~RUBY)
bar = foo? ? 1 : 2
^^^^^^^^^^^^^^^^^^ Assign variables inside of conditionals
RUBY
expect_correction(<<~RUBY)
foo? ? bar = 1 : bar = 2
RUBY
end
end
context 'SingleLineConditionsOnly true' do
let(:config) do
RuboCop::Config.new('Style/ConditionalAssignment' => {
'Enabled' => true,
'SingleLineConditionsOnly' => true,
'IncludeTernaryExpressions' => true,
'EnforcedStyle' => 'assign_inside_condition',
'SupportedStyles' => %w[assign_to_condition
assign_inside_condition]
},
'Layout/EndAlignment' => {
'EnforcedStyleAlignWith' => 'keyword',
'Enabled' => true
},
'Layout/LineLength' => {
'Max' => 80,
'Enabled' => true
})
end
it_behaves_like('all variable types', 'bar')
it_behaves_like('all variable types', 'BAR')
it_behaves_like('all variable types', 'FOO::BAR')
it_behaves_like('all variable types', '@bar')
it_behaves_like('all variable types', '@@bar')
it_behaves_like('all variable types', '$BAR')
it_behaves_like('all variable types', 'foo.bar')
it_behaves_like('multiline all variable types allow', 'bar')
it_behaves_like('multiline all variable types allow', 'BAR')
it_behaves_like('multiline all variable types allow', 'FOO::BAR')
it_behaves_like('multiline all variable types allow', '@bar')
it_behaves_like('multiline all variable types allow', '@@bar')
it_behaves_like('multiline all variable types allow', '$BAR')
it_behaves_like('multiline all variable types allow', 'foo.bar')
it_behaves_like('all assignment types', '=')
it_behaves_like('all assignment types', '==')
it_behaves_like('all assignment types', '===')
it_behaves_like('all assignment types', '+=')
it_behaves_like('all assignment types', '-=')
it_behaves_like('all assignment types', '*=')
it_behaves_like('all assignment types', '**=')
it_behaves_like('all assignment types', '/=')
it_behaves_like('all assignment types', '%=')
it_behaves_like('all assignment types', '^=')
it_behaves_like('all assignment types', '&=')
it_behaves_like('all assignment types', '|=')
it_behaves_like('all assignment types', '<=')
it_behaves_like('all assignment types', '>=')
it_behaves_like('all assignment types', '<<=')
it_behaves_like('all assignment types', '>>=')
it_behaves_like('all assignment types', '||=')
it_behaves_like('all assignment types', '&&=')
it_behaves_like('all assignment types', '<<')
it_behaves_like('multiline all assignment types allow', '=')
it_behaves_like('multiline all assignment types allow', '==')
it_behaves_like('multiline all assignment types allow', '===')
it_behaves_like('multiline all assignment types allow', '+=')
it_behaves_like('multiline all assignment types allow', '-=')
it_behaves_like('multiline all assignment types allow', '*=')
it_behaves_like('multiline all assignment types allow', '**=')
it_behaves_like('multiline all assignment types allow', '/=')
it_behaves_like('multiline all assignment types allow', '%=')
it_behaves_like('multiline all assignment types allow', '^=')
it_behaves_like('multiline all assignment types allow', '&=')
it_behaves_like('multiline all assignment types allow', '|=')
it_behaves_like('multiline all assignment types allow', '<=')
it_behaves_like('multiline all assignment types allow', '>=')
it_behaves_like('multiline all assignment types allow', '<<=')
it_behaves_like('multiline all assignment types allow', '>>=')
it_behaves_like('multiline all assignment types allow', '||=')
it_behaves_like('multiline all assignment types allow', '&&=')
it_behaves_like('multiline all assignment types allow', '<<')
it 'allows a method call in the subject of a ternary operator' do
expect_no_offenses('bar << foo? ? 1 : 2')
end
it 'registers an offense for assignment using a method that ends with an equal sign' do
expect_offense(<<~RUBY)
self.attributes = foo? ? 1 : 2
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Assign variables inside of conditionals
RUBY
expect_correction(<<~RUBY)
foo? ? self.attributes = 1 : self.attributes = 2
RUBY
end
it 'registers an offense for assignment using []=' do
expect_offense(<<~RUBY)
foo[:a] = if bar?
^^^^^^^^^^^^^^^^^ Assign variables inside of conditionals
1
else
2
end
RUBY
expect_correction(<<~RUBY)
if bar?
foo[:a] = 1
else
foo[:a] = 2
end
RUBY
end
it 'registers an offense for assignment to an if then else' do
expect_offense(<<~RUBY)
bar = if foo then 1
^^^^^^^^^^^^^^^^^^^ Assign variables inside of conditionals
else 2
end
RUBY
expect_correction(<<~RUBY)
if foo then bar = 1
else bar = 2
end
RUBY
end
it 'registers an offense for assignment to case when then else' do
expect_offense(<<~RUBY)
baz = case foo
^^^^^^^^^^^^^^ Assign variables inside of conditionals
when bar then 1
else 2
end
RUBY
expect_correction(<<~RUBY)
case foo
when bar then baz = 1
else baz = 2
end
RUBY
end
context 'for loop' do
it 'ignores pseudo assignments in a for loop' do
expect_no_offenses('for i in [1, 2, 3]; puts i; end')
end
end
it_behaves_like('single line condition autocorrect')
it 'corrects assignment to a namespaced constant' do
expect_offense(<<~RUBY)
FOO::BAR = if baz?
^^^^^^^^^^^^^^^^^^ Assign variables inside of conditionals
1
else
2
end
RUBY
expect_correction(<<~RUBY)
if baz?
FOO::BAR = 1
else
FOO::BAR = 2
end
RUBY
end
it 'corrects assignment when without `else` branch' do
expect_offense(<<~RUBY)
var = if foo
^^^^^^^^^^^^ Assign variables inside of conditionals
bar
elsif baz
qux
end
RUBY
expect_correction(<<~RUBY)
if foo
var = bar
elsif baz
var = qux
end
RUBY
end
end
context 'SingleLineConditionsOnly false' do
let(:config) do
RuboCop::Config.new('Style/ConditionalAssignment' => {
'Enabled' => true,
'SingleLineConditionsOnly' => false,
'IncludeTernaryExpressions' => true,
'EnforcedStyle' => 'assign_inside_condition',
'SupportedStyles' => %w[assign_to_condition
assign_inside_condition]
},
'Layout/EndAlignment' => {
'EnforcedStyleAlignWith' => 'keyword',
'Enabled' => true
},
'Layout/LineLength' => {
'Max' => 80,
'Enabled' => true
})
end
it_behaves_like('all variable types', 'bar')
it_behaves_like('all variable types', 'BAR')
it_behaves_like('all variable types', 'FOO::BAR')
it_behaves_like('all variable types', '@bar')
it_behaves_like('all variable types', '@@bar')
it_behaves_like('all variable types', '$BAR')
it_behaves_like('all variable types', 'foo.bar')
it_behaves_like('multiline all variable types offense', 'bar')
it_behaves_like('multiline all variable types offense', 'BAR')
it_behaves_like('multiline all variable types offense', 'FOO::BAR')
it_behaves_like('multiline all variable types offense', '@bar')
it_behaves_like('multiline all variable types offense', '@@bar')
it_behaves_like('multiline all variable types offense', '$BAR')
it_behaves_like('multiline all variable types offense', 'foo.bar')
it_behaves_like('all assignment types', '=')
it_behaves_like('all assignment types', '==')
it_behaves_like('all assignment types', '===')
it_behaves_like('all assignment types', '+=')
it_behaves_like('all assignment types', '-=')
it_behaves_like('all assignment types', '*=')
it_behaves_like('all assignment types', '**=')
it_behaves_like('all assignment types', '/=')
it_behaves_like('all assignment types', '%=')
it_behaves_like('all assignment types', '^=')
it_behaves_like('all assignment types', '&=')
it_behaves_like('all assignment types', '|=')
it_behaves_like('all assignment types', '<=')
it_behaves_like('all assignment types', '>=')
it_behaves_like('all assignment types', '<<=')
it_behaves_like('all assignment types', '>>=')
it_behaves_like('all assignment types', '||=')
it_behaves_like('all assignment types', '&&=')
it_behaves_like('all assignment types', '<<')
it_behaves_like('multiline all assignment types offense', '=')
it_behaves_like('multiline all assignment types offense', '==')
it_behaves_like('multiline all assignment types offense', '===')
it_behaves_like('multiline all assignment types offense', '+=')
it_behaves_like('multiline all assignment types offense', '-=')
it_behaves_like('multiline all assignment types offense', '*=')
it_behaves_like('multiline all assignment types offense', '**=')
it_behaves_like('multiline all assignment types offense', '/=')
it_behaves_like('multiline all assignment types offense', '%=')
it_behaves_like('multiline all assignment types offense', '^=')
it_behaves_like('multiline all assignment types offense', '&=')
it_behaves_like('multiline all assignment types offense', '|=')
it_behaves_like('multiline all assignment types offense', '<=')
it_behaves_like('multiline all assignment types offense', '>=')
it_behaves_like('multiline all assignment types offense', '<<=')
it_behaves_like('multiline all assignment types offense', '>>=')
it_behaves_like('multiline all assignment types offense', '||=')
it_behaves_like('multiline all assignment types offense', '&&=')
it_behaves_like('multiline all assignment types offense', '<<')
it_behaves_like('single line condition autocorrect')
it 'corrects assignment to a multiline if else condition' do
expect_offense(<<~RUBY)
bar = if foo
^^^^^^^^^^^^ Assign variables inside of conditionals
something
1
else
something_else
2
end
RUBY
expect_correction(<<~RUBY)
if foo
something
bar = 1
else
something_else
bar = 2
end
RUBY