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v/vlib/encoding/utf8/utf8_util_test.v

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import encoding.utf8
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fn test_utf8_util() {
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// string test
src := 'ăĂ ôÔ testo æ' //_\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 æ' //_\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'
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// ustring test
src1 := src.ustring()
upper1 := utf8.u_to_upper(src1)
lower1 := utf8.u_to_lower(src1)
assert upper1 == (src_upper.ustring())
assert lower1 == (src_lower.ustring())
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// test len function
assert utf8.len('') == 0
assert utf8.len('pippo') == 5
assert utf8.len(src) == 15 // 29
assert src.len == 24 // 49
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// test u_len function
assert utf8.u_len(''.ustring()) == 0
assert utf8.u_len(src1) == 15 // 29
assert utf8.u_len('pippo'.ustring()) == 5
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// 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')
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// 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
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}
fn test_raw_indexing() {
a := 'V Lang!'
// test non ascii characters
assert utf8.raw_index(a, 0) == ''
assert utf8.raw_index(a, 1) == ''
// 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 := 'V Lang!'
b := 'hello world'
assert utf8.reverse(a) == '!gnaL V'
assert utf8.reverse(b) == 'dlrow olleh'
}