diff options
| -rw-r--r-- | lib/shellwords.rb | 2 | ||||
| -rw-r--r-- | test/test_shellwords.rb | 13 |
2 files changed, 12 insertions, 3 deletions
diff --git a/lib/shellwords.rb b/lib/shellwords.rb index d02d3b06d5..66092c8999 100644 --- a/lib/shellwords.rb +++ b/lib/shellwords.rb @@ -125,7 +125,7 @@ module Shellwords str = str.to_s # An empty argument will be skipped, so return empty quotes. - return "''" if str.empty? + return "''".dup if str.empty? str = str.dup diff --git a/test/test_shellwords.rb b/test/test_shellwords.rb index 59cdbe96dc..e70e0d72bf 100644 --- a/test/test_shellwords.rb +++ b/test/test_shellwords.rb @@ -48,8 +48,17 @@ class TestShellwords < Test::Unit::TestCase end def test_stringification - assert_equal "3", shellescape(3) - assert_equal "ps -p #{$$}", ['ps', '-p', $$].shelljoin + three = shellescape(3) + assert_equal '3', three + assert_not_predicate three, :frozen? + + empty = shellescape('') + assert_equal "''", empty + assert_not_predicate empty, :frozen? + + joined = ['ps', '-p', $$].shelljoin + assert_equal "ps -p #{$$}", joined + assert_not_predicate joined, :frozen? end def test_multibyte_characters |