diff options
Diffstat (limited to 'js/src/tests/test262/built-ins/String/prototype/codePointAt/return-utf16-decode.js')
-rw-r--r-- | js/src/tests/test262/built-ins/String/prototype/codePointAt/return-utf16-decode.js | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/String/prototype/codePointAt/return-utf16-decode.js b/js/src/tests/test262/built-ins/String/prototype/codePointAt/return-utf16-decode.js new file mode 100644 index 0000000000..42620b6277 --- /dev/null +++ b/js/src/tests/test262/built-ins/String/prototype/codePointAt/return-utf16-decode.js @@ -0,0 +1,41 @@ +// Copyright (C) 2015 the V8 project authors. All rights reserved. +// This code is governed by the BSD license found in the LICENSE file. +/*--- +es6id: 21.1.3.3 +description: > + Return UTF16 Decode value of the lead and trail elements at index position. +info: | + 21.1.3.3 String.prototype.codePointAt ( pos ) + + ... + 8. Let first be the code unit value of the element at index position in the + String S. + 9. If first < 0xD800 or first > 0xDBFF or position+1 = size, return first. + 10. Let second be the code unit value of the element at index position+1 in + the String S. + 11. If second < 0xDC00 or second > 0xDFFF, return first. + 12. Return UTF16Decode(first, second). + + 10.1.2 Static Semantics: UTF16Decode( lead, trail ) + + Two code units, lead and trail, that form a UTF-16 surrogate pair are + converted to a code point by performing the following steps: + + 1. Assert: 0xD800 ≤ lead ≤ 0xDBFF and 0xDC00 ≤ trail ≤ 0xDFFF. + 2. Let cp be (lead – 0xD800) × 1024 + (trail – 0xDC00) + 0x10000. + 3. Return the code point cp. +---*/ + +assert.sameValue('\uD800\uDC00'.codePointAt(0), 65536, 'U+10000'); +assert.sameValue('\uD800\uDDD0'.codePointAt(0), 66000, 'U+101D0'); +assert.sameValue('\uD800\uDFFF'.codePointAt(0), 66559, 'U+103FF'); + +assert.sameValue('\uDAAA\uDC00'.codePointAt(0), 763904, 'U+BA800'); +assert.sameValue('\uDAAA\uDDD0'.codePointAt(0), 764368, 'U+BA9D0'); +assert.sameValue('\uDAAA\uDFFF'.codePointAt(0), 764927, 'U+BABFF'); + +assert.sameValue('\uDBFF\uDC00'.codePointAt(0), 1113088, 'U+10FC00'); +assert.sameValue('\uDBFF\uDDD0'.codePointAt(0), 1113552, 'U+10FDD0'); +assert.sameValue('\uDBFF\uDFFF'.codePointAt(0), 1114111, 'U+10FFFF'); + +reportCompare(0, 0); |