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stdlib/String: add a test that shows that equality comparison of strings

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is performed according to the deterministic Unicode collation algorithm,
which allows us to use the hash of the NFD form.

rdar://17498444

Swift SVN r20543
This commit is contained in:
Dmitri Hrybenko
2014-07-25 14:31:07 +00:00
parent 1a28fdc225
commit c44b42c7aa
3 changed files with 31 additions and 6 deletions
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17
test/stdlib/NSStringAPI.swift
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@@ -1238,6 +1238,23 @@ let equalityTests = [
// U+FB01 LATIN SMALL LIGATURE FI
EqualityTest(true, "\u{fb01}", "\u{fb01}"),
EqualityTest(false, "\u{fb01}", "fi"),
// Test that Unicode collation is performed in deterministic mode.
//
// U+0301 COMBINING ACUTE ACCENT
// U+0341 COMBINING ACUTE TONE MARK
// U+0954 DEVANAGARI ACUTE ACCENT
//
// Collation elements from DUCET:
// 0301 ; [.0000.0024.0002] # COMBINING ACUTE ACCENT
// 0341 ; [.0000.0024.0002] # COMBINING ACUTE TONE MARK
// 0954 ; [.0000.0024.0002] # DEVANAGARI ACUTE ACCENT
//
// U+0301 and U+0954 don't decompose in the canonical decomposition mapping.
// U+0341 has a canonical decomposition mapping of U+0301.
EqualityTest(true, "\u{0301}", "\u{0341}"),
EqualityTest(false, "\u{0301}", "\u{0954}"),
EqualityTest(false, "\u{0341}", "\u{0954}"),
]
NSStringAPIs.test("OperatorEquals") {