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require "test_helper"
# Tests for character encoding handling in QR codes
class CharacterEncodingTest < Minitest::Test
def test_printable_ascii_uses_byte_mode
ascii_string = (32..126).map(&:chr).join
qr = RQRCodeCore::QRCode.new(ascii_string)
assert_equal :mode_8bit_byte, qr.mode
end
def test_control_characters
# Newlines, tabs, null bytes, and other control chars
[
"line1\nline2", # LF
"line1\r\nline2", # CRLF
"line1\rline2", # CR
"field1\tfield2", # Tab
"before\x00after", # Null byte
"test\x07data", # Bell
"test\x1Bdata" # Escape
].each do |input|
qr = RQRCodeCore::QRCode.new(input)
refute_nil qr.modules
end
end
def test_utf8_multibyte_characters
# Representative samples from different Unicode blocks
samples = [
"Café résumé naïve", # Latin extended
"Привет мир", # Cyrillic
"你好世界", # CJK
"こんにちは", # Japanese Hiragana
"مرحبا بالعالم", # Arabic (RTL)
"שלום עולם", # Hebrew (RTL)
"∑∫∂√∞≈≠±×÷", # Mathematical symbols
"$ € £ ¥ ₹ ₽", # Currency symbols
"Hello 👋 World 🌍", # Emoji
"Hello مرحبا 你好" # Mixed LTR/RTL
]
samples.each do |text|
qr = RQRCodeCore::QRCode.new(text)
refute_nil qr.modules
end
end
def test_complex_emoji_sequences
# Compound emoji with modifiers and zero-width joiners
["👋🏻👋🏾", "👨👩👧👦", "🏴"].each do |emoji|
qr = RQRCodeCore::QRCode.new(emoji)
refute_nil qr.modules
end
rescue => e
skip "Complex compound emoji not fully supported: #{e.message}"
end
def test_zero_width_and_combining_characters
# Zero-width joiners, non-joiners, and combining marks
[
"test\u200Djoiner",
"test\u200Cnon-joiner",
"test\u200Bspace",
"e\u0301" # e + combining acute accent
].each do |text|
qr = RQRCodeCore::QRCode.new(text)
refute_nil qr.modules
end
end
def test_long_utf8_string_fits_within_max_version
long_utf8 = "こんにちは世界" * 20
qr = RQRCodeCore::QRCode.new(long_utf8, level: :l)
assert qr.version <= 40
end
def test_binary_data_non_utf8
binary = "\xFF\xFE\xFD\xFC\xFB"
binary.force_encoding(Encoding::BINARY)
qr = RQRCodeCore::QRCode.new(binary)
refute_nil qr.modules
end
def test_special_unicode_areas
# BOM, Private Use Area, Supplementary Planes
[
"\uFEFFHello World", # BOM
"\uE000\uE001\uE002", # Private Use Area
"𐐀𐐁𐐂" # Deseret alphabet (supplementary plane)
].each do |text|
qr = RQRCodeCore::QRCode.new(text)
refute_nil qr.modules
end
end
def test_output_maintains_utf8_encoding
qr = RQRCodeCore::QRCode.new("Hello 世界")
output = qr.to_s
assert_equal Encoding::UTF_8, output.encoding
end
end
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