Style/EmptyCaseCondition wrongly autocorrects multiple values

[maximeg]

This is an issue about the Style/EmptyCaseCondition cop that wrongly autocorrects lines with multiples values.

---

Given a file with :

case
when my.foo?, my.bar?
  something
when my.baz?
  something_else
end

Expected behavior

File should be modified to:

if my.foo? || my.bar?
  something
elsif my.baz?
  something_else
end

Actual behavior

File is modified to:

if my.foo?, my.bar?
  something
elsif my.baz?
  something_else
end

Rubocop output is :

rubocop -D -a                
Inspecting 1 file
E

Offenses:

test.rb:1:1: C: [Corrected] Style/EmptyCaseCondition: Do not use empty case condition, instead use an if expression.
case
^^^^
test.rb:2:11: E: unexpected token tCOMMA
(Using Ruby 2.3 parser; configure using TargetRubyVersion parameter, under AllCops)
if my.foo?, my.bar?
          ^
test.rb:4:1: E: unexpected token kELSIF
(Using Ruby 2.3 parser; configure using TargetRubyVersion parameter, under AllCops)
elsif my.baz?
^^^^^
test.rb:6:1: E: unexpected token kEND
(Using Ruby 2.3 parser; configure using TargetRubyVersion parameter, under AllCops)
end
^^^

RuboCop version

$ rubocop -V
0.48.1 (using Parser 2.4.0.0, running on ruby 2.3.3 x86_64-darwin16)

[robbie-smith]

I was able to reproduce the bug reported as well. I reproduced it using the same syntax and got the same results as above.

rubicon -D -a
Inspecting 1 file
E

Offenses:

test.rb:1:1: C: [Corrected] Style/EmptyCaseCondition: Do not use empty case condition, instead use an if expression.
case
^^^^
test.rb:1:5: C: [Corrected] Style/TrailingWhitespace: Trailing whitespace detected.
case
    ^
test.rb:1:11: E: unexpected token tCOMMA
(Using Ruby 2.1 parser; configure using TargetRubyVersion parameter, under AllCops)
if my.foo?, my.bar?
          ^
test.rb:3:1: E: unexpected token kELSIF
(Using Ruby 2.1 parser; configure using TargetRubyVersion parameter, under AllCops)
elsif my.baz?
^^^^^
test.rb:5:1: E: unexpected token kEND
(Using Ruby 2.1 parser; configure using TargetRubyVersion parameter, under AllCops)
end
^^^

1 file inspected, 5 offenses detected, 2 offenses corrected

rubocop -v
0.48.1