[ruby/csv] Revert "parser: fix a keep bug that some texts may be dropped unexpectedly"

This reverts commit https://github.com/ruby/csv/commit/5c6523da0a61.

This introduces another pbolem. We should try again later.

https://github.com/ruby/csv/commit/43a1d6fff1

1 files changed, 0 insertions, 37 deletions

diff --git a/test/csv/parse/test_inputs_scanner.rb b/test/csv/parse/test_inputs_scanner.rb
deleted file mode 100644
index dd0a64cc45..0000000000
--- a/test/csv/parse/test_inputs_scanner.rb
+++ /dev/null
@@ -1,37 +0,0 @@
-require_relative "../helper"
-
-class TestCSVParseInputsScanner < Test::Unit::TestCase
-  include Helper
-
-  def test_keep_over_chunks_nested_back
-    input = CSV::Parser::UnoptimizedStringIO.new("abcdefghijklmnl")
-    scanner = CSV::Parser::InputsScanner.new([input],
-                                             Encoding::UTF_8,
-                                             nil,
-                                             chunk_size: 2)
-    scanner.keep_start
-    assert_equal("abc", scanner.scan_all(/[a-c]+/))
-    scanner.keep_start
-    assert_equal("def", scanner.scan_all(/[d-f]+/))
-    scanner.keep_back
-    scanner.keep_back
-    assert_equal("abcdefg", scanner.scan_all(/[a-g]+/))
-  end
-
-
-  def test_keep_over_chunks_nested_drop_back
-    input = CSV::Parser::UnoptimizedStringIO.new("abcdefghijklmnl")
-    scanner = CSV::Parser::InputsScanner.new([input],
-                                             Encoding::UTF_8,
-                                             nil,
-                                             chunk_size: 3)
-    scanner.keep_start
-    assert_equal("ab", scanner.scan(/../))
-    scanner.keep_start
-    assert_equal("c", scanner.scan(/./))
-    assert_equal("d", scanner.scan(/./))
-    scanner.keep_drop
-    scanner.keep_back
-    assert_equal("abcdefg", scanner.scan_all(/[a-g]+/))
-  end
-end