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Tests: Add a test for mbsinit

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Tim Schumacher 2021-09-19 14:11:53 +02:00 committed by Brian Gianforcaro
parent 212f9308d4
commit e7f99edefa
1 changed files with 28 additions and 0 deletions
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28
Tests/LibC/TestWchar.cpp
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@ -198,3 +198,31 @@ TEST_CASE(wcscoll)
EXPECT(wcscoll(L"a", L"z") < 0);
EXPECT(wcscoll(L"z", L"a") > 0);
}
TEST_CASE(mbsinit)
{
// Ensure that nullptr is considered an initial state.
EXPECT(mbsinit(nullptr) != 0);
// Ensure that a zero-initialized state is recognized as initial state.
mbstate_t state = {};
EXPECT(mbsinit(&state) != 0);
// Read a partial multibyte sequence (0b11011111 / 0xdf).
size_t ret = mbrtowc(nullptr, "\xdf", 1, &state);
if (ret != -2ul)
FAIL(String::formatted("mbrtowc accepted partial multibyte sequence with return code {} (expected -2)", static_cast<ssize_t>(ret)));
// Ensure that we are not in an initial state.
EXPECT(mbsinit(&state) == 0);
// Read the remaining multibyte sequence (0b10111111 / 0xbf).
ret = mbrtowc(nullptr, "\xbf", 1, &state);
if (ret != 1ul)
FAIL(String::formatted("mbrtowc did not consume the expected number of bytes (1), returned {} instead", static_cast<ssize_t>(ret)));
// Ensure that we are in an initial state again.
EXPECT(mbsinit(&state) != 0);
}