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// |reftest| shell-option(--enable-well-formed-unicode-strings) skip-if(!String.prototype.isWellFormed||!xulRuntime.shell) -- String.prototype.isWellFormed is not enabled unconditionally, requires shell-options
// Copyright (C) 2022 Jordan Harband. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-string.prototype.iswellformed
description: >
The method should return a boolean.
info: |
String.prototype.isWellFormed ( )
1. Let O be ? RequireObjectCoercible(this value).
2. Let S be ? ToString(O).
3. Return IsStringWellFormedUnicode(S).
features: [String.prototype.isWellFormed]
---*/
assert.sameValue(typeof String.prototype.isWellFormed, 'function');
var leadingPoo = '\uD83D';
var trailingPoo = '\uDCA9';
var wholePoo = leadingPoo + trailingPoo;
assert.sameValue(
('a' + leadingPoo + 'c' + leadingPoo + 'e').isWellFormed(),
false,
'lone leading surrogates are not well-formed'
);
assert.sameValue(
('a' + trailingPoo + 'c' + trailingPoo + 'e').isWellFormed(),
false,
'lone trailing surrogates are not well-formed'
);
assert.sameValue(
('a' + trailingPoo + leadingPoo + 'd').isWellFormed(),
false,
'a wrong-ordered surrogate pair is not well-formed'
)
assert.sameValue('a💩c'.isWellFormed(), true, 'a surrogate pair using a literal code point is well-formed');
assert.sameValue('a\uD83D\uDCA9c'.isWellFormed(), true, 'a surrogate pair formed by escape sequences is well-formed');
assert.sameValue(('a' + leadingPoo + trailingPoo + 'd').isWellFormed(), true, 'a surrogate pair formed by concatenation is well-formed');
assert.sameValue(wholePoo.slice(0, 1).isWellFormed(), false, 'a surrogate pair sliced to the leading surrogate is not well-formed');
assert.sameValue(wholePoo.slice(1).isWellFormed(), false, 'a surrogate pair sliced to the trailing surrogate is not well-formed');
assert.sameValue('abc'.isWellFormed(), true, 'a latin-1 string is well-formed');
assert.sameValue('a\u25A8c'.isWellFormed(), true, 'a non-ASCII character is well-formed');
reportCompare(0, 0);
|
