1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/js/src/jit-test/tests/for-of/strings.js Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,47 @@
1.4 +// for-of works on strings and String objects.
1.5 +
1.6 +load(libdir + "string.js");
1.7 +
1.8 +function test(s, expectedCodePoints) {
1.9 + var copy = '';
1.10 + var codepoints = 0;
1.11 + var singleHighSurrogate = false;
1.12 + for (var v of s) {
1.13 + assertEq(typeof v, 'string');
1.14 + assertEq(v.length, isSurrogatePair(v) ? 2 : 1);
1.15 + assertEq(false, singleHighSurrogate && isLowSurrogate(v));
1.16 + copy += v;
1.17 + codepoints += 1;
1.18 + singleHighSurrogate = !isSurrogatePair(v) && isHighSurrogate(v);
1.19 + }
1.20 + assertEq(copy, String(s));
1.21 + assertEq(codepoints, expectedCodePoints);
1.22 +}
1.23 +
1.24 +test('', 0);
1.25 +test('abc', 3);
1.26 +test('a \0 \ufffe \ufeff', 7);
1.27 +
1.28 +// Non-BMP characters are generally passed to JS in UTF-16, as surrogate pairs.
1.29 +// ES6 requires that such pairs be treated as a single code point in for-of.
1.30 +test('\ud808\udf45', 1);
1.31 +
1.32 +// Also test invalid surrogate pairs:
1.33 +// (1) High surrogate not followed by low surrogate
1.34 +test('\ud808', 1);
1.35 +test('\ud808\u0000', 2);
1.36 +// (2) Low surrogate not preceded by high surrogate
1.37 +test('\udf45', 1);
1.38 +test('\u0000\udf45', 2);
1.39 +// (3) Low surrogate followed by high surrogate
1.40 +test('\udf45\ud808', 2);
1.41 +
1.42 +test(new String(''), 0);
1.43 +test(new String('abc'), 3);
1.44 +test(new String('a \0 \ufffe \ufeff'), 7);
1.45 +test(new String('\ud808\udf45'), 1);
1.46 +test(new String('\ud808'), 1);
1.47 +test(new String('\ud808\u0000'), 2);
1.48 +test(new String('\udf45'), 1);
1.49 +test(new String('\u0000\udf45'), 2);
1.50 +test(new String('\udf45\ud808'), 2);
