# frozen_string_literal: false

require_relative "../helper"

class TestCSVParseSkipLines < Test::Unit::TestCase
  extend DifferentOFS
  include Helper

  def test_default
    csv = CSV.new("a,b,c\n")
    assert_nil(csv.skip_lines)
  end

  def test_regexp
    csv = <<-CSV
1
#2
 #3
4
    CSV
    assert_equal([
                   ["1"],
                   ["4"],
                 ],
                 CSV.parse(csv, :skip_lines => /\A\s*#/))
  end

  def test_regexp_quoted
    csv = <<-CSV
1
#2
"#3"
4
    CSV
    assert_equal([
                   ["1"],
                   ["#3"],
                   ["4"],
                 ],
                 CSV.parse(csv, :skip_lines => /\A\s*#/))
  end

  def test_string
    csv = <<-CSV
1
.2
3.
4
    CSV
    assert_equal([
                   ["1"],
                   ["4"],
                 ],
                 CSV.parse(csv, :skip_lines => "."))
  end

  class RegexStub
  end

  def test_not_matchable
    regex_stub = RegexStub.new
    csv = CSV.new("1\n", :skip_lines => regex_stub)
    error = assert_raise(ArgumentError) do
      csv.shift
    end
    assert_equal(":skip_lines has to respond to #match: #{regex_stub.inspect}",
                 error.message)
  end

  class Matchable
    def initialize(pattern)
      @pattern = pattern
    end

    def match(line)
      @pattern.match(line)
    end
  end

  def test_matchable
    csv = <<-CSV
1
# 2
3
# 4
    CSV
    assert_equal([
                   ["1"],
                   ["3"],
                 ],
                 CSV.parse(csv, :skip_lines => Matchable.new(/\A#/)))
  end

  def test_multibyte_data
    # U+3042 HIRAGANA LETTER A
    # U+3044 HIRAGANA LETTER I
    # U+3046 HIRAGANA LETTER U
    value = "\u3042\u3044\u3046"
    with_chunk_size("5") do
      assert_equal([[value], [value]],
                   CSV.parse("#{value}\n#{value}\n",
                             :skip_lines => /\A#/))
    end
  end

  def test_empty_line_and_liberal_parsing
    assert_equal([["a", "b"]],
                 CSV.parse("a,b\n",
                           :liberal_parsing => true,
                           :skip_lines => /^$/))
  end

  def test_crlf
    assert_equal([["a", "b"]],
                 CSV.parse("a,b\r\n,\r\n",
                           :skip_lines => /^,+$/))
  end
end
