| 1 | //===-- Unittests for wcsnlen ---------------------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | #include "hdr/types/size_t.h" |
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| 10 | #include "hdr/types/wchar_t.h" |
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| 11 | #include "src/wchar/wcsnlen.h" |
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| 12 | #include "test/UnitTest/Test.h" |
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| 13 | |
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| 14 | TEST(LlvmLibcWCSNLenTest, EmptyString) { |
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| 15 | ASSERT_EQ(static_cast<size_t>(0), LIBC_NAMESPACE::wcsnlen(L"" , 0)); |
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| 16 | // If N is greater than string length, this should still return 0. |
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| 17 | ASSERT_EQ(static_cast<size_t>(0), LIBC_NAMESPACE::wcsnlen(L"" , 1)); |
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| 18 | } |
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| 19 | |
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| 20 | TEST(LlvmLibcWCSNLenTest, OneCharacterString) { |
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| 21 | const wchar_t *src = L"A" ; |
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| 22 | ASSERT_EQ(static_cast<size_t>(1), LIBC_NAMESPACE::wcsnlen(src, 1)); |
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| 23 | // If N is 0, this should return 0. |
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| 24 | ASSERT_EQ(static_cast<size_t>(0), LIBC_NAMESPACE::wcsnlen(src, 0)); |
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| 25 | // If N is greater than string length, this should still return 1. |
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| 26 | ASSERT_EQ(static_cast<size_t>(1), LIBC_NAMESPACE::wcsnlen(src, 3)); |
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| 27 | } |
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| 28 | |
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| 29 | TEST(LlvmLibcWCSNLenTest, ManyCharacterString) { |
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| 30 | const wchar_t *src = L"123456789" ; |
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| 31 | ASSERT_EQ(static_cast<size_t>(9), LIBC_NAMESPACE::wcsnlen(src, 9)); |
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| 32 | // If N is 0, this should return 0. |
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| 33 | ASSERT_EQ(static_cast<size_t>(0), LIBC_NAMESPACE::wcsnlen(src, 0)); |
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| 34 | // If N is smaller than the string length, it should return N. |
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| 35 | ASSERT_EQ(static_cast<size_t>(3), LIBC_NAMESPACE::wcsnlen(src, 3)); |
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| 36 | // If N is greater than string length, this should still return 9. |
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| 37 | ASSERT_EQ(static_cast<size_t>(9), LIBC_NAMESPACE::wcsnlen(src, 42)); |
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| 38 | } |
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| 39 | |
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| 40 | TEST(LlvmLibcWCSNLenTest, IgnoreCharactersAfterNullTerminator) { |
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| 41 | const wchar_t src[5] = {L'a', L'b', L'c', L'\0', L'd'}; |
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| 42 | ASSERT_EQ(static_cast<size_t>(3), LIBC_NAMESPACE::wcsnlen(src, 3)); |
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| 43 | // This should only read up to the null terminator. |
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| 44 | ASSERT_EQ(static_cast<size_t>(3), LIBC_NAMESPACE::wcsnlen(src, 4)); |
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| 45 | ASSERT_EQ(static_cast<size_t>(3), LIBC_NAMESPACE::wcsnlen(src, 5)); |
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| 46 | } |
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| 47 | |
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| 48 | TEST(LlvmLibcWCSNLenTest, NoNullTerminator) { |
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| 49 | const wchar_t src[4] = {L'a', L'b', L'c', L'd'}; |
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| 50 | // Should return 4 |
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| 51 | ASSERT_EQ(static_cast<size_t>(4), LIBC_NAMESPACE::wcsnlen(src, 4)); |
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| 52 | // Should return 2 since N is smaller than string length |
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| 53 | ASSERT_EQ(static_cast<size_t>(2), LIBC_NAMESPACE::wcsnlen(src, 2)); |
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| 54 | } |
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| 55 | |
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