Class MultibyteCharsExtrasTest < ActiveSupport::TestCase

# File activesupport/test/multibyte_chars_test.rb, line 499
def test_capitalize_should_be_unicode_aware
  { 'аБвг аБвг' => 'Абвг абвг',
    'аБвг АБВГ' => 'Абвг абвг',
    'АБВГ АБВГ' => 'Абвг абвг',
    '' => '' }.each do |f,t|
      assert_equal t, chars(f).capitalize
  end
end

# File activesupport/test/multibyte_chars_test.rb, line 679
def test_class_is_not_forwarded
  assert_equal BYTE_STRING.dup.mb_chars.class, ActiveSupport::Multibyte::Chars
end

# File activesupport/test/multibyte_chars_test.rb, line 554
def test_composition_exclusion_is_set_up_properly
  # Normalization of DEVANAGARI LETTER QA breaks when composition exclusion isn't used correctly
  qa = [0x915, 0x93c].pack('U*')
  assert_equal qa, chars(qa).normalize(:c)
end

# File activesupport/test/multibyte_chars_test.rb, line 489
def test_downcase_should_be_unicode_aware
  assert_equal "абвгд\0f", chars("аБвгд\0F").downcase
  assert_equal 'こにちわ', chars('こにちわ').downcase
end

# File activesupport/test/multibyte_chars_test.rb, line 547
def test_limit_should_keep_under_the_specified_byte_limit
  example = chars(UNICODE_STRING)
  (1..UNICODE_STRING.length).each do |limit|
    assert example.limit(limit).to_s.length <= limit
  end
end

# File activesupport/test/multibyte_chars_test.rb, line 517
def test_limit_should_not_break_on_blank_strings
  example = chars('')
  assert_equal example, example.limit(0)
  assert_equal example, example.limit(1)
end

# File activesupport/test/multibyte_chars_test.rb, line 523
def test_limit_should_work_on_a_multibyte_string
  example = chars(UNICODE_STRING)
  bytesize = UNICODE_STRING.bytesize

  assert_equal UNICODE_STRING, example.limit(bytesize)
  assert_equal '', example.limit(0)
  assert_equal '', example.limit(1)
  assert_equal 'こ', example.limit(3)
  assert_equal 'こに', example.limit(6)
  assert_equal 'こに', example.limit(8)
  assert_equal 'こにち', example.limit(9)
  assert_equal 'こにちわ', example.limit(50)
end

# File activesupport/test/multibyte_chars_test.rb, line 537
def test_limit_should_work_on_an_ascii_string
  ascii = chars(ASCII_STRING)
  assert_equal ASCII_STRING, ascii.limit(ASCII_STRING.length)
  assert_equal '', ascii.limit(0)
  assert_equal 'o', ascii.limit(1)
  assert_equal 'oh', ascii.limit(2)
  assert_equal 'ohay', ascii.limit(4)
  assert_equal 'ohayo', ascii.limit(50)
end

# File activesupport/test/multibyte_chars_test.rb, line 562
def test_normalization_C_pri_29
  [
    [0x0B47, 0x0300, 0x0B3E],
    [0x1100, 0x0300, 0x1161]
  ].map { |c| c.pack('U*') }.each do |c|
    assert_equal_codepoints c, chars(c).normalize(:c)
  end
end

# File activesupport/test/multibyte_chars_test.rb, line 571
def test_normalization_shouldnt_strip_null_bytes
  null_byte_str = "Test\0test"

  assert_equal null_byte_str, chars(null_byte_str).normalize(:kc)
  assert_equal null_byte_str, chars(null_byte_str).normalize(:c)
  assert_equal null_byte_str, chars(null_byte_str).normalize(:d)
  assert_equal null_byte_str, chars(null_byte_str).normalize(:kd)
  assert_equal null_byte_str, chars(null_byte_str).decompose
  assert_equal null_byte_str, chars(null_byte_str).compose
end

# File activesupport/test/multibyte_chars_test.rb, line 597
def test_should_compute_grapheme_length
  [
    ['', 0],
    ['abc', 3],
    ['こにちわ', 4],
    [[0x0924, 0x094D, 0x0930].pack('U*'), 2],
    [%w(cr lf), 1],
    [%w(l l), 1],
    [%w(l v), 1],
    [%w(l lv), 1],
    [%w(l lvt), 1],
    [%w(lv v), 1],
    [%w(lv t), 1],
    [%w(v v), 1],
    [%w(v t), 1],
    [%w(lvt t), 1],
    [%w(t t), 1],
    [%w(n extend), 1],
    [%w(n n), 2],
    [%w(n cr lf n), 3],
    [%w(n l v t), 2]
  ].each do |input, expected_length|
    if input.kind_of?(Array)
      str = string_from_classes(input)
    else
      str = input
    end
    assert_equal expected_length, chars(str).grapheme_length
  end
end

# File activesupport/test/multibyte_chars_test.rb, line 582
def test_simple_normalization
  comp_str = [
    44,  # LATIN CAPITAL LETTER D
    307, # COMBINING DOT ABOVE
    328, # COMBINING OGONEK
    323 # COMBINING DOT BELOW
  ].pack("U*")

  assert_equal_codepoints '', chars('').normalize
  assert_equal_codepoints [44,105,106,328,323].pack("U*"), chars(comp_str).normalize(:kc).to_s
  assert_equal_codepoints [44,307,328,323].pack("U*"), chars(comp_str).normalize(:c).to_s
  assert_equal_codepoints [44,307,110,780,78,769].pack("U*"), chars(comp_str).normalize(:d).to_s
  assert_equal_codepoints [44,105,106,110,780,78,769].pack("U*"), chars(comp_str).normalize(:kd).to_s
end

# File activesupport/test/multibyte_chars_test.rb, line 494
def test_swapcase_should_be_unicode_aware
  assert_equal "аaéÜ\0f", chars("АAÉü\0F").swapcase
  assert_equal 'こにちわ', chars('こにちわ').swapcase
end

# File activesupport/test/multibyte_chars_test.rb, line 672
def test_tidy_bytes_should_forcibly_tidy_bytes_if_specified
  byte_string = "\xF0\xA5\xA4\xA4" # valid as both CP-1252 and UTF-8, but with different interpretations.
  assert_not_equal "𥤤", chars(byte_string).tidy_bytes
  # Forcible conversion to UTF-8
  assert_equal "𥤤", chars(byte_string).tidy_bytes(true)
end

# File activesupport/test/multibyte_chars_test.rb, line 628
def test_tidy_bytes_should_tidy_bytes

  single_byte_cases = {
    "\x21" => "!",   # Valid ASCII byte, low
    "\x41" => "A",   # Valid ASCII byte, mid
    "\x7E" => "~",   # Valid ASCII byte, high
    "\x80" => "€",   # Continuation byte, low (cp125)
    "\x94" => "”",   # Continuation byte, mid (cp125)
    "\x9F" => "Ÿ",   # Continuation byte, high (cp125)
    "\xC0" => "À",   # Overlong encoding, start of 2-byte sequence, but codepoint < 128
    "\xC1" => "Á",   # Overlong encoding, start of 2-byte sequence, but codepoint < 128
    "\xC2" => "Â",   # Start of 2-byte sequence, low
    "\xC8" => "È",   # Start of 2-byte sequence, mid
    "\xDF" => "ß",   # Start of 2-byte sequence, high
    "\xE0" => "à",   # Start of 3-byte sequence, low
    "\xE8" => "è",   # Start of 3-byte sequence, mid
    "\xEF" => "ï",   # Start of 3-byte sequence, high
    "\xF0" => "ð",   # Start of 4-byte sequence
    "\xF1" => "ñ",   # Unused byte
    "\xFF" => "ÿ",   # Restricted byte
    "\x00" => "\x00" # null char
  }

  single_byte_cases.each do |bad, good|
    assert_equal good, chars(bad).tidy_bytes.to_s
    assert_equal "#{good}#{good}", chars("#{bad}#{bad}").tidy_bytes
    assert_equal "#{good}#{good}#{good}", chars("#{bad}#{bad}#{bad}").tidy_bytes
    assert_equal "#{good}a", chars("#{bad}a").tidy_bytes
    assert_equal "#{good}á", chars("#{bad}á").tidy_bytes
    assert_equal "a#{good}a", chars("a#{bad}a").tidy_bytes
    assert_equal "á#{good}á", chars("á#{bad}á").tidy_bytes
    assert_equal "a#{good}", chars("a#{bad}").tidy_bytes
    assert_equal "á#{good}", chars("á#{bad}").tidy_bytes
  end

  byte_string = "\270\236\010\210\245"
  tidy_string = [0xb8, 0x17e, 0x8, 0x2c6, 0xa5].pack('U*')
  assert_equal_codepoints tidy_string, chars(byte_string).tidy_bytes
  assert_nothing_raised { chars(byte_string).tidy_bytes.to_s.unpack('U*') }

  # UTF-8 leading byte followed by too few continuation bytes
  assert_equal_codepoints "\xc3\xb0\xc2\xa5\xc2\xa4\x21", chars("\xf0\xa5\xa4\x21").tidy_bytes
end

# File activesupport/test/multibyte_chars_test.rb, line 508
def test_titleize_should_be_unicode_aware
  assert_equal "Él Que Se Enteró", chars("ÉL QUE SE ENTERÓ").titleize
  assert_equal "Абвг Абвг", chars("аБвг аБвг").titleize
end

# File activesupport/test/multibyte_chars_test.rb, line 513
def test_titleize_should_not_affect_characters_that_do_not_case_fold
  assert_equal "日本語", chars("日本語").titleize
end

# File activesupport/test/multibyte_chars_test.rb, line 484
def test_upcase_should_be_unicode_aware
  assert_equal "АБВГД\0F", chars("аБвгд\0f").upcase
  assert_equal 'こにちわ', chars('こにちわ').upcase
end