Import CSV 3.0.2

This includes performance improvement especially writing. Writing is
about 2 times faster.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66507 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 13 insertions, 1 deletions

diff --git a/test/csv/test_interface.rb b/test/csv/test_interface.rb
index 912e2ec7f5..309fbbb87b 100755
--- a/test/csv/test_interface.rb
+++ b/test/csv/test_interface.rb
@@ -139,6 +139,18 @@ class TestCSV::Interface < TestCSV
     assert_equal(Array.new, CSV.parse_line("\n1,2,3"))
   end
 
+  def test_parse_header_only
+    table = CSV.parse("a,b,c", headers: true)
+    assert_equal([
+                   ["a", "b", "c"],
+                   [],
+                 ],
+                 [
+                   table.headers,
+                   table.each.to_a,
+                 ])
+  end
+
   def test_read_and_readlines
     assert_equal( @expected,
                   CSV.read(@path, col_sep: "\t", row_sep: "\r\n") )
@@ -236,7 +248,7 @@ class TestCSV::Interface < TestCSV
     CSV.open(@path, "w", headers: true) do |csv|
       csv << headers
       csv << %w{1 2 3}
-      assert_equal(headers, csv.instance_variable_get(:@headers))
+      assert_equal(headers, csv.headers)
     end
   end