1 files changed, 93 insertions, 0 deletions
diff --git a/test/csv/parse/test_quote_char_nil.rb b/test/csv/parse/test_quote_char_nil.rb
new file mode 100644
index 0000000000..fc3b646759
--- /dev/null
+++ b/test/csv/parse/test_quote_char_nil.rb
@@ -0,0 +1,93 @@
+# -*- coding: utf-8 -*-
+# frozen_string_literal: false
+
+require_relative "../helper"
+
+class TestCSVParseQuoteCharNil < Test::Unit::TestCase
+  extend DifferentOFS
+
+  def test_full
+    assert_equal(["a", "b"], CSV.parse_line(%Q{a,b}, quote_char: nil))
+  end
+
+  def test_end_with_nil
+    assert_equal(["a", nil, nil, nil], CSV.parse_line(%Q{a,,,}, quote_char: nil))
+  end
+
+  def test_nil_nil
+    assert_equal([nil, nil], CSV.parse_line(%Q{,}, quote_char: nil))
+  end
+
+  def test_unquoted_value_multiple_characters_col_sep
+    data = %q{a<b<=>x}
+    assert_equal([[%Q{a<b}, "x"]], CSV.parse(data, col_sep: "<=>", quote_char: nil))
+  end
+
+  def test_csv_header_string
+    data = <<~DATA
+      first,second,third
+      A,B,C
+      1,2,3
+    DATA
+    assert_equal(
+      CSV::Table.new([
+        CSV::Row.new(["my", "new", "headers"], ["first", "second", "third"]),
+        CSV::Row.new(["my", "new", "headers"], ["A", "B", "C"]),
+        CSV::Row.new(["my", "new", "headers"], ["1", "2", "3"])
+      ]),
+      CSV.parse(data, headers: "my,new,headers", quote_char: nil)
+    )
+  end
+
+  def test_comma
+    assert_equal([["a", "b", nil, "d"]],
+                 CSV.parse("a,b,,d", col_sep: ",", quote_char: nil))
+  end
+
+  def test_space
+    assert_equal([["a", "b", nil, "d"]],
+                 CSV.parse("a b  d", col_sep: " ", quote_char: nil))
+  end
+
+  def encode_array(array, encoding)
+    array.collect do |element|
+      element ? element.encode(encoding) : element
+    end
+  end
+
+  def test_space_no_ascii
+    encoding = Encoding::UTF_16LE
+    assert_equal([encode_array(["a", "b", nil, "d"], encoding)],
+                 CSV.parse("a b  d".encode(encoding),
+                           col_sep: " ".encode(encoding),
+                           quote_char: nil))
+  end
+
+  def test_multiple_space
+    assert_equal([["a b", nil, "d"]],
+                 CSV.parse("a b    d", col_sep: "  ", quote_char: nil))
+  end
+
+  def test_multiple_characters_leading_empty_fields
+    data = <<-CSV
+<=><=>A<=>B<=>C
+1<=>2<=>3
+    CSV
+    assert_equal([
+                   [nil, nil, "A", "B", "C"],
+                   ["1", "2", "3"],
+                 ],
+                 CSV.parse(data, col_sep: "<=>", quote_char: nil))
+  end
+
+  def test_line
+    lines = [
+      "abc,def\n",
+    ]
+    csv = CSV.new(lines.join(""), quote_char: nil)
+    lines.each do |line|
+      csv.shift
+      assert_equal(line, csv.line)
+    end
+  end
+end