| 1 | //===-- Unittests for wmemcmp ---------------------------------------------===// |
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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/wmemcmp.h" |
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| 12 | #include "test/UnitTest/Test.h" |
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| 13 | |
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| 14 | TEST(LlvmLibcWMemcmpTest, CmpZeroByte) { |
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| 15 | // Comparing zero bytes should result in 0. |
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| 16 | const wchar_t *lhs = L"ab" ; |
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| 17 | const wchar_t *rhs = L"yz" ; |
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| 18 | EXPECT_EQ(LIBC_NAMESPACE::wmemcmp(lhs, rhs, 0), 0); |
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| 19 | } |
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| 20 | |
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| 21 | TEST(LlvmLibcWMemcmpTest, LhsRhsAreTheSame) { |
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| 22 | // Comparing strings of equal value should result in 0. |
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| 23 | const wchar_t *lhs = L"ab" ; |
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| 24 | const wchar_t *rhs = L"ab" ; |
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| 25 | EXPECT_EQ(LIBC_NAMESPACE::wmemcmp(lhs, rhs, 2), 0); |
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| 26 | } |
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| 27 | |
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| 28 | TEST(LlvmLibcWMemcmpTest, LhsBeforeRhsLexically) { |
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| 29 | // z after b, should result in a value less than 0. |
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| 30 | const wchar_t *lhs = L"ab" ; |
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| 31 | const wchar_t *rhs = L"az" ; |
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| 32 | EXPECT_LT(LIBC_NAMESPACE::wmemcmp(lhs, rhs, 2), 0); |
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| 33 | } |
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| 34 | |
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| 35 | TEST(LlvmLibcWMemcmpTest, LhsAfterRhsLexically) { |
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| 36 | // z after b, should result in a value greater than 0. |
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| 37 | const wchar_t *lhs = L"az" ; |
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| 38 | const wchar_t *rhs = L"ab" ; |
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| 39 | EXPECT_GT(LIBC_NAMESPACE::wmemcmp(lhs, rhs, 2), 0); |
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| 40 | } |
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| 41 | |
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| 42 | TEST(LlvmLibcWMemcmpTest, CompareToEmpty) { |
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| 43 | // lhs is nonempty, should result in a value greater than 0. |
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| 44 | const wchar_t *lhs = L"az" ; |
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| 45 | const wchar_t *rhs = L"" ; |
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| 46 | EXPECT_GT(LIBC_NAMESPACE::wmemcmp(lhs, rhs, 1), 0); |
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| 47 | } |
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| 48 | |
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| 49 | TEST(LlvmLibcWMemcmpTest, LhsAfterRhsLexicallyLong) { |
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| 50 | // b after a, should result in a value greater than 0. |
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| 51 | const wchar_t *lhs = L"aaaaaaaaaaaaab" ; |
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| 52 | const wchar_t *rhs = L"aaaaaaaaaaaaaa" ; |
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| 53 | EXPECT_GT(LIBC_NAMESPACE::wmemcmp(lhs, rhs, 15), 0); |
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| 54 | } |
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| 55 | |
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| 56 | TEST(LlvmLibcWMemcmpTest, RhsAfterLhsLexicallyLong) { |
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| 57 | // b after a, should result in a value less than 0. |
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| 58 | const wchar_t *lhs = L"aaaaaaaaaaaaaa" ; |
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| 59 | const wchar_t *rhs = L"aaaaaaaaaaaaab" ; |
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| 60 | EXPECT_LT(LIBC_NAMESPACE::wmemcmp(lhs, rhs, 15), 0); |
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| 61 | } |
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| 62 | |
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| 63 | TEST(LlvmLibcWMemcmpTest, LhsRhsAreTheSameLong) { |
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| 64 | // Comparing strings of equal value should result in 0. |
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| 65 | const wchar_t *lhs = L"aaaaaaaaaaaaaa" ; |
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| 66 | const wchar_t *rhs = L"aaaaaaaaaaaaaa" ; |
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| 67 | EXPECT_EQ(LIBC_NAMESPACE::wmemcmp(lhs, rhs, 15), 0); |
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| 68 | } |
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| 69 | |
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| 70 | #if defined(LIBC_ADD_NULL_CHECKS) && !defined(LIBC_HAS_SANITIZER) |
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| 71 | TEST(LlvmLibcWMemcmpTest, NullptrCrash) { |
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| 72 | // Passing in a nullptr should crash the program. |
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| 73 | EXPECT_DEATH([] { LIBC_NAMESPACE::wmemcmp(L"aaaaaaaaaaaaaa" , nullptr, 15); }, |
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| 74 | WITH_SIGNAL(-1)); |
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| 75 | EXPECT_DEATH([] { LIBC_NAMESPACE::wmemcmp(nullptr, L"aaaaaaaaaaaaaa" , 15); }, |
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| 76 | WITH_SIGNAL(-1)); |
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| 77 | } |
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| 78 | #endif // LIBC_HAS_ADDRESS_SANITIZER |
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| 79 | |
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