Merge csv-3.2.3

test/csv/parse/test_inputs_scanner.rb

@@ -0,0 +1,63 @@
+require_relative "../helper"
+
+class TestCSVParseInputsScanner < Test::Unit::TestCase
+  include Helper
+
+  def test_scan_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_scan_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
+
+  def test_each_line_keep_over_chunks_multibyte
+    input = CSV::Parser::UnoptimizedStringIO.new("ab\n\u{3000}a\n")
+    scanner = CSV::Parser::InputsScanner.new([input],
+                                             Encoding::UTF_8,
+                                             nil,
+                                             chunk_size: 1)
+    each_line = scanner.each_line("\n")
+    assert_equal("ab\n", each_line.next)
+    scanner.keep_start
+    assert_equal("\u{3000}a\n", each_line.next)
+    scanner.keep_back
+    assert_equal("\u{3000}a\n", scanner.scan_all(/[^,]+/))
+  end
+
+  def test_each_line_keep_over_chunks_fit_chunk_size
+    input = CSV::Parser::UnoptimizedStringIO.new("\na")
+    scanner = CSV::Parser::InputsScanner.new([input],
+                                             Encoding::UTF_8,
+                                             nil,
+                                             chunk_size: 1)
+    each_line = scanner.each_line("\n")
+    assert_equal("\n", each_line.next)
+    scanner.keep_start
+    assert_equal("a", each_line.next)
+    scanner.keep_back
+  end
+end