(str)
| 136 | |
| 137 | // Independent UTF-8 byte-length oracle with replacement semantics. |
| 138 | const utf8Bytes = (str) => { |
| 139 | let n = 0; |
| 140 | for (let i = 0; i < str.length; i++) { |
| 141 | const c = str.charCodeAt(i); |
| 142 | if (c < 0x80) n += 1; |
| 143 | else if (c < 0x800) n += 2; |
| 144 | else if (c >= 0xD800 && c <= 0xDBFF) { |
| 145 | const next = str.charCodeAt(i + 1); |
| 146 | if (next >= 0xDC00 && next <= 0xDFFF) { n += 4; i++; } else n += 3; |
| 147 | } else n += 3; // BMP >= 0x800, incl. unpaired low surrogate |
| 148 | } |
| 149 | return n; |
| 150 | }; |
| 151 | |
| 152 | const cases = [ |
| 153 | 'a'.repeat(300) + HI + 'b'.repeat(300), // Unpaired high inside large 2-byte |
no outgoing calls
no test coverage detected