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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/i18n/case_conversion.h"
#include "base/i18n/rtl.h"
#include "base/strings/utf_string_conversions.h"
#include "base/test/icu_test_util.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/icu/source/i18n/unicode/usearch.h"
namespace base {
namespace i18n {
namespace {
const wchar_t kNonASCIIMixed[] =
L"\xC4\xD6\xE4\xF6\x20\xCF\xEF\x20\xF7\x25"
L"\xA4\x23\x2A\x5E\x60\x40\xA3\x24\x2030\x201A\x7E\x20\x1F07\x1F0F"
L"\x20\x1E00\x1E01";
const wchar_t kNonASCIILower[] =
L"\xE4\xF6\xE4\xF6\x20\xEF\xEF"
L"\x20\xF7\x25\xA4\x23\x2A\x5E\x60\x40\xA3\x24\x2030\x201A\x7E\x20\x1F07"
L"\x1F07\x20\x1E01\x1E01";
const wchar_t kNonASCIIUpper[] =
L"\xC4\xD6\xC4\xD6\x20\xCF\xCF"
L"\x20\xF7\x25\xA4\x23\x2A\x5E\x60\x40\xA3\x24\x2030\x201A\x7E\x20\x1F0F"
L"\x1F0F\x20\x1E00\x1E00";
} // namespace
// Test upper and lower case string conversion.
TEST(CaseConversionTest, UpperLower) {
const string16 mixed(ASCIIToUTF16("Text with UPPer & lowER casE."));
const string16 expected_lower(ASCIIToUTF16("text with upper & lower case."));
const string16 expected_upper(ASCIIToUTF16("TEXT WITH UPPER & LOWER CASE."));
string16 result = ToLower(mixed);
EXPECT_EQ(expected_lower, result);
result = ToUpper(mixed);
EXPECT_EQ(expected_upper, result);
}
TEST(CaseConversionTest, NonASCII) {
const string16 mixed(WideToUTF16(kNonASCIIMixed));
const string16 expected_lower(WideToUTF16(kNonASCIILower));
const string16 expected_upper(WideToUTF16(kNonASCIIUpper));
string16 result = ToLower(mixed);
EXPECT_EQ(expected_lower, result);
result = ToUpper(mixed);
EXPECT_EQ(expected_upper, result);
}
TEST(CaseConversionTest, TurkishLocaleConversion) {
const string16 mixed(WideToUTF16(L"\x49\x131"));
const string16 expected_lower(WideToUTF16(L"\x69\x131"));
const string16 expected_upper(WideToUTF16(L"\x49\x49"));
test::ScopedRestoreICUDefaultLocale restore_locale;
i18n::SetICUDefaultLocale("en_US");
string16 result = ToLower(mixed);
EXPECT_EQ(expected_lower, result);
result = ToUpper(mixed);
EXPECT_EQ(expected_upper, result);
i18n::SetICUDefaultLocale("tr");
const string16 expected_lower_turkish(WideToUTF16(L"\x131\x131"));
const string16 expected_upper_turkish(WideToUTF16(L"\x49\x49"));
result = ToLower(mixed);
EXPECT_EQ(expected_lower_turkish, result);
result = ToUpper(mixed);
EXPECT_EQ(expected_upper_turkish, result);
}
TEST(CaseConversionTest, FoldCase) {
// Simple ASCII, should lower-case.
EXPECT_EQ(ASCIIToUTF16("hello, world"),
FoldCase(ASCIIToUTF16("Hello, World")));
// Non-ASCII cases from above. They should all fold to the same result.
EXPECT_EQ(FoldCase(WideToUTF16(kNonASCIIMixed)),
FoldCase(WideToUTF16(kNonASCIILower)));
EXPECT_EQ(FoldCase(WideToUTF16(kNonASCIIMixed)),
FoldCase(WideToUTF16(kNonASCIIUpper)));
// Turkish cases from above. This is the lower-case expected result from the
// US locale. It should be the same even when the current locale is Turkish.
const string16 turkish(WideToUTF16(L"\x49\x131"));
const string16 turkish_expected(WideToUTF16(L"\x69\x131"));
test::ScopedRestoreICUDefaultLocale restore_locale;
i18n::SetICUDefaultLocale("en_US");
EXPECT_EQ(turkish_expected, FoldCase(turkish));
i18n::SetICUDefaultLocale("tr");
EXPECT_EQ(turkish_expected, FoldCase(turkish));
// Test a case that gets bigger when processed.
// U+130 = LATIN CAPITAL LETTER I WITH DOT ABOVE gets folded to a lower case
// "i" followed by U+307 COMBINING DOT ABOVE.
EXPECT_EQ(WideToUTF16(L"i\u0307j"), FoldCase(WideToUTF16(L"\u0130j")));
// U+00DF (SHARP S) and U+1E9E (CAPIRAL SHARP S) are both folded to "ss".
EXPECT_EQ(ASCIIToUTF16("ssss"), FoldCase(WideToUTF16(L"\u00DF\u1E9E")));
}
} // namespace i18n
} // namespace base
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