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text: test the whole Adobe Symbol encoding table

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The symbol_unicode table has 130 entries; only U+F0DE was covered by a test.
Add symbol_unicode_table_covers_the_adobe_encoding, which asserts every
code->real-Unicode mapping directly against the authoritative
unicode.org/MAPPINGS/VENDORS/ADOBE/symbol.txt table, plus that ASCII
pass-through and CUS fragment codes return None. It is pure and
platform-independent (no fonts involved), so it runs on every machine and
catches any typo in the table.
This commit is contained in:
Bryson Meiling
2026-10-16 14:50:09 -06:00
parent 271c6c4037
commit 8f4b0d4c3f
1 changed files with 50 additions and 0 deletions
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crates/text/src/tests.rs
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@@ -969,6 +969,56 @@ fn symbol_font_remaps_private_use_to_real_unicode() {
}
}
/// Every entry of the Adobe Symbol encoding table, in full. Pure and platform-independent: the
/// table maps a Symbol code to its real Unicode character regardless of any installed font, so this
/// runs on every machine. Guarded against typos in `symbol_unicode` (e.g. 0x40 must be U+2245, the
/// congruent sign, not U+22C5 dot operator).
#[test]
fn symbol_unicode_table_covers_the_adobe_encoding() {
// (code, real Unicode) from unicode.org/Public/MAPPINGS/VENDORS/ADOBE/symbol.txt.
// Only the non-ASCII, non-CUS entries; ASCII codes pass through as themselves and CUS fragment
// glyphs have no standard Unicode point, so `symbol_unicode` returns None for them.
let table: &[(u32, u32)] = &[
// 0x20–0x7E: the few mathematical ones among the ASCII-range characters.
(0x22, 0x2200), (0x24, 0x2203), (0x27, 0x220B), (0x2A, 0x2217), (0x2D, 0x2212), (0x3C, 0x2264), (0x3D, 0x2265), (0x3E, 0x221E), (0x3F, 0x2234), (0x40, 0x2245),
(0x5C, 0x2234), (0x5E, 0x22A5), (0x7E, 0x223C),
// 0x41–0x5A: Greek uppercase.
(0x41, 0x0391), (0x42, 0x0392), (0x43, 0x03A7), (0x44, 0x0394), (0x45, 0x0395), (0x46, 0x03A6), (0x47, 0x0393), (0x48, 0x0397), (0x49, 0x0399), (0x4A, 0x03D1),
(0x4B, 0x039A), (0x4C, 0x039B), (0x4D, 0x039C), (0x4E, 0x039D), (0x4F, 0x039F), (0x50, 0x03A0), (0x51, 0x0398), (0x52, 0x03A1), (0x53, 0x03A3), (0x54, 0x03A4),
(0x55, 0x03A5), (0x56, 0x03C2), (0x57, 0x03A9), (0x58, 0x039E), (0x59, 0x03A8), (0x5A, 0x0396),
// 0x61–0x7A: Greek lowercase.
(0x61, 0x03B1), (0x62, 0x03B2), (0x63, 0x03C7), (0x64, 0x03B4), (0x65, 0x03B5), (0x66, 0x03C6), (0x67, 0x03B3), (0x68, 0x03B7), (0x69, 0x03B9), (0x6A, 0x03D5),
(0x6B, 0x03BA), (0x6C, 0x03BB), (0x6D, 0x03BC), (0x6E, 0x03BD), (0x6F, 0x03BF), (0x70, 0x03C0), (0x71, 0x03B8), (0x72, 0x03C1), (0x73, 0x03C3), (0x74, 0x03C4),
(0x75, 0x03C5), (0x76, 0x03D6), (0x77, 0x03C9), (0x78, 0x03BE), (0x79, 0x03C8), (0x7A, 0x03B6),
// 0xA1–0xAF: Greek upsilon with hook, primes, math, suits and arrows.
(0xA1, 0x03D2), (0xA2, 0x2032), (0xA3, 0x2264), (0xA4, 0x2215), (0xA5, 0x221E), (0xA6, 0x0192), (0xA7, 0x2663), (0xA8, 0x2666), (0xA9, 0x2665), (0xAA, 0x2660),
(0xAB, 0x2194), (0xAC, 0x2190), (0xAD, 0x2191), (0xAE, 0x2192), (0xAF, 0x2193),
// 0xB0–0xBC: degree, plus-minus, double prime, math and ellipsis.
(0xB0, 0x00B0), (0xB1, 0x00B1), (0xB2, 0x2033), (0xB3, 0x2265), (0xB4, 0x00D7), (0xB5, 0x221D), (0xB6, 0x2202), (0xB7, 0x2022), (0xB8, 0x00F7), (0xB9, 0x2260),
(0xBA, 0x2261), (0xBB, 0x2248), (0xBC, 0x2026), (0xBF, 0x21B5),
// 0xC0–0xCF: letterlike symbols, set relations.
(0xC0, 0x2135), (0xC1, 0x2111), (0xC2, 0x211C), (0xC3, 0x2118), (0xC4, 0x2297), (0xC5, 0x2295), (0xC6, 0x2205), (0xC7, 0x2229), (0xC8, 0x222A), (0xC9, 0x2283),
(0xCA, 0x2287), (0xCB, 0x2284), (0xCC, 0x2282), (0xCD, 0x2286), (0xCE, 0x2208), (0xCF, 0x2209),
// 0xD0–0xDF: angle, nabla, product, radical, not, ands, ors, double arrows.
(0xD0, 0x2220), (0xD1, 0x2207), (0xD5, 0x220F), (0xD6, 0x221A), (0xD7, 0x22C5), (0xD8, 0x00AC), (0xD9, 0x2227), (0xDA, 0x2228), (0xDB, 0x21D4), (0xDC, 0x21D0),
(0xDD, 0x21D1), (0xDE, 0x21D2), (0xDF, 0x21D3),
// 0xE0–0xF5: lozenge, angle brackets, summation, integral.
(0xE0, 0x25CA), (0xE1, 0x2329), (0xE5, 0x2211), (0xF1, 0x232A), (0xF2, 0x222B), (0xF3, 0x2320), (0xF5, 0x2321),
];
for &(code, uni) in table {
assert_eq!(symbol_unicode(code), Some(uni), "Symbol code 0x{code:02X} must map to U+{uni:04X}");
}
// ASCII codes pass through as themselves (symbol_unicode has no entry), and the CUS fragment
// codes return None: 0x60 radical extender, 0xBD/0xBE arrow extenders, 0xD2–0xD4 serif marks,
// 0xE2–0xE4 sans-serif marks and the paren/bracket extender run 0xE6–0xFF.
for code in [0x20, 0x21, 0x23, 0x25, 0x26, 0x28, 0x29, 0x2B, 0x2C, 0x2E, 0x2F, 0x30, 0x31, 0x39, 0x3A, 0x3B, 0x5B, 0x5D, 0x5F, 0x7B, 0x7C, 0x7D] {
assert_eq!(symbol_unicode(code), None, "ASCII code 0x{code:02X} has no Symbol remap");
}
for code in [0x60, 0xBD, 0xBE, 0xD2, 0xD3, 0xD4, 0xE2, 0xE3, 0xE4, 0xE6, 0xE7, 0xE8, 0xE9, 0xEA, 0xEB, 0xEC, 0xED, 0xEE, 0xEF, 0xF0, 0xF4, 0xF6, 0xF7, 0xF8, 0xF9, 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0xFF] {
assert_eq!(symbol_unicode(code), None, "CUS code 0x{code:02X} has no standard Unicode remap");
}
}
#[test]
fn symbol_font_characters_draw_in_the_sym_font() {
// PowerPoint stores a Symbol-font character as U+F0xx with `<a:sym typeface="Symbol"/>`: