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Improve RegExp LegacyOctalEscapeSequence coverage (#2558)

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Alexey Shvayka 2020-03-31 23:52:46 +03:00 committed by GitHub
parent 772fd320cd
commit 40a1a6f6d2
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1 changed files with 16 additions and 7 deletions
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23
test/annexB/language/literals/regexp/legacy-octal-escape.js
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@ -2,10 +2,9 @@
// This code is governed by the BSD license found in the LICENSE file.
/*---
esid: sec-regular-expressions-patterns
es6id: B.1.4
description: Legacy Octal Escape Sequence
info: |
CharacterEscape[U]::
CharacterEscape[U] ::
ControlEscape
c ControlLetter
0 [lookahead ∉ DecimalDigit]
@ -14,13 +13,17 @@ info: |
[~U] LegacyOctalEscapeSequence
IdentityEscape[?U]
The production CharacterEscape::LegacyOctalEscapeSequence evaluates by
LegacyOctalEscapeSequence ::
OctalDigit [lookahead ∉ OctalDigit]
ZeroToThree OctalDigit [lookahead ∉ OctalDigit]
FourToSeven OctalDigit
ZeroToThree OctalDigit OctalDigit
The production CharacterEscape :: LegacyOctalEscapeSequence evaluates by
evaluating the SV of the LegacyOctalEscapeSequence (see B.1.2) and
returning its character result.
---*/
var match;
assert.sameValue(/\1/.exec('\x01')[0], '\x01', '\\1');
assert.sameValue(/\2/.exec('\x02')[0], '\x02', '\\2');
assert.sameValue(/\3/.exec('\x03')[0], '\x03', '\\3');
@ -41,7 +44,7 @@ assert.sameValue(/\47/.exec('\x27')[0], '\x27', '\\47');
assert.sameValue(/\70/.exec('\x38')[0], '\x38', '\\70');
assert.sameValue(/\77/.exec('\x3f')[0], '\x3f', '\\77');
// Sequence is bounded according to the String Value (not number of characters)
// Sequence is bounded according to the String Value
assert.sameValue(/\400/.exec('\x200')[0], '\x200', '\\400');
assert.sameValue(/\470/.exec('\x270')[0], '\x270', '\\470');
assert.sameValue(/\700/.exec('\x380')[0], '\x380', '\\700');
@ -54,8 +57,14 @@ assert.sameValue(/\070/.exec('\x38')[0], '\x38', '\\070');
assert.sameValue(/\300/.exec('\xc0')[0], '\xc0', '\\300');
assert.sameValue(/\307/.exec('\xc7')[0], '\xc7', '\\307');
assert.sameValue(/\370/.exec('\xf8')[0], '\xf8', '\\370');
assert.sameValue(/\377/.exec('\xff')[0], '\xff', '\\377');
match = /(.)\1/.exec('a\x01 aa');
// Sequence is 3 characters max, including leading zeros
assert.sameValue(/\0111/.exec('\x091')[0], '\x091', '\\0111');
assert.sameValue(/\0022/.exec('\x022')[0], '\x022', '\\0022');
assert.sameValue(/\0003/.exec('\x003')[0], '\x003', '\\0003');
var match = /(.)\1/.exec('a\x01 aa');
assert.sameValue(
match[0], 'aa', 'DecimalEscape takes precedence over LegacyOctalEscapeSequence'
);