Fixed regression to convert blank value at r45497.

  [Bug #11126][ruby-core:69088]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59643 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 9 insertions, 0 deletions

diff --git a/test/csv/test_data_converters.rb b/test/csv/test_data_converters.rb
index e274b2b10b..0786ca6d0f 100755
--- a/test/csv/test_data_converters.rb
+++ b/test/csv/test_data_converters.rb
@@ -176,6 +176,15 @@ class TestCSV::DataConverters < TestCSV
                   @parser.shift.fields )
   end
 
+  def test_custom_converter_with_blank_field
+    converter = lambda { |field| field.nil? }
+    row = nil
+    assert_nothing_raised(Exception) do
+      row = CSV.parse_line('nil,', converters: converter)
+    end
+    assert_equal([false, true], row);
+  end
+
   def test_shortcut_interface
     assert_equal( ["Numbers", ":integer", 1, ":float", 3.015],
                   CSV.parse_line(@data, converters: :numeric) )