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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)
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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() )
// test len function
assert utf8.len("pippo")==5
assert utf8.len(src)==15 //29
assert src.len==24 //49
// test u_len function
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")
// 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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}