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import encoding.utf8
fn test_utf8_util() {
// string test
src := 'ăĂ ôÔ testo 怔' //_\u1E5A\u1E5B<=>\u1F49\u1F41<=>\u0128\u012a\u012c" // len 29 runes, raw 49 bytes
src_upper := 'ĂĂ ÔÔ TESTO Æ€”' //_\u1E5A\u1E5A<=>\u1F49\u1F49<=>\u0128\u012A\u012C"
src_lower := 'ăă ôô testo 怔' //_\u1E5B\u1E5B<=>\u1F41\u1F41<=>\u0129\u012B\u012D"
upper := utf8.to_upper(src)
lower := utf8.to_lower(src)
assert upper == src_upper
assert lower == src_lower
assert utf8.to_upper('абвёabc12｛') == 'АБВЁABC12｛'
assert utf8.to_lower('АБВЁABC12｛') == 'абвёabc12｛'
// test len function
assert utf8.len('') == 0
assert utf8.len('pippo') == 5
assert utf8.len(src) == 15 // 29
assert src.len == 24 // 49
// western punctuation
a := '.abc?abcòàè.'
assert utf8.is_punct(a, 0) == true
assert utf8.is_punct('b', 0) == false
assert utf8.is_uchar_punct(0x002E) == true
assert utf8.is_punct(a, 4) == true // ?
assert utf8.is_punct(a, 14) == true // last .
assert utf8.is_punct(a, 12) == false // è
println('OK western')
// global punctuation
b := '.ĂĂa. ÔÔ TESTO Æ€'
assert utf8.is_global_punct(b, 0) == true
assert utf8.is_global_punct('.', 0) == true
assert utf8.is_uchar_punct(0x002E) == true
assert utf8.is_global_punct(b, 6) == true // .
assert utf8.is_global_punct(b, 1) == false // a
// test utility functions
assert utf8.get_uchar(b, 0) == 0x002E
}
fn test_raw_indexing() {
a := '我是V Lang!'
// test non ascii characters
assert utf8.raw_index(a, 0) == '我'
assert utf8.raw_index(a, 1) == '是'
// test ascii characters
assert utf8.raw_index(a, 2) == 'V'
assert utf8.raw_index(a, 3) == ' '
assert utf8.raw_index(a, 4) == 'L'
assert utf8.raw_index(a, 5) == 'a'
assert utf8.raw_index(a, 6) == 'n'
assert utf8.raw_index(a, 7) == 'g'
assert utf8.raw_index(a, 8) == '!'
}
fn test_reversed() {
a := '我是V Lang!'
b := '你好世界hello world'
assert utf8.reverse(a) == '!gnaL V是我'
assert utf8.reverse(b) == 'dlrow olleh界世好你'
}
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