55 lines · cpp
1//===-- Unittests for strcspn ---------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#include "src/string/strcspn.h"10 11#include "test/UnitTest/Test.h"12 13TEST(LlvmLibcStrCSpnTest, ComplementarySpanShouldNotGoPastNullTerminator) {14 const char src[5] = {'a', 'b', '\0', 'c', 'd'};15 EXPECT_EQ(LIBC_NAMESPACE::strcspn(src, "b"), size_t{1});16 EXPECT_EQ(LIBC_NAMESPACE::strcspn(src, "d"), size_t{2});17 18 // Same goes for the segment to be searched for.19 const char segment[5] = {'1', '2', '\0', '3', '4'};20 EXPECT_EQ(LIBC_NAMESPACE::strcspn("123", segment), size_t{0});21}22 23TEST(LlvmLibcStrCSpnTest, ComplementarySpanForEachIndividualCharacter) {24 const char *src = "12345";25 // The complementary span size should increment accordingly.26 EXPECT_EQ(LIBC_NAMESPACE::strcspn(src, "1"), size_t{0});27 EXPECT_EQ(LIBC_NAMESPACE::strcspn(src, "2"), size_t{1});28 EXPECT_EQ(LIBC_NAMESPACE::strcspn(src, "3"), size_t{2});29 EXPECT_EQ(LIBC_NAMESPACE::strcspn(src, "4"), size_t{3});30 EXPECT_EQ(LIBC_NAMESPACE::strcspn(src, "5"), size_t{4});31}32 33TEST(LlvmLibcStrCSpnTest, ComplementarySpanIsStringLengthIfNoCharacterFound) {34 // Null terminator.35 EXPECT_EQ(LIBC_NAMESPACE::strcspn("", ""), size_t{0});36 EXPECT_EQ(LIBC_NAMESPACE::strcspn("", "_"), size_t{0});37 // Single character.38 EXPECT_EQ(LIBC_NAMESPACE::strcspn("a", "b"), size_t{1});39 // Multiple characters.40 EXPECT_EQ(LIBC_NAMESPACE::strcspn("abc", "1"), size_t{3});41}42 43TEST(LlvmLibcStrCSpnTest, DuplicatedCharactersNotPartOfComplementarySpan) {44 // Complementary span should be zero in all these cases.45 EXPECT_EQ(LIBC_NAMESPACE::strcspn("a", "aa"), size_t{0});46 EXPECT_EQ(LIBC_NAMESPACE::strcspn("aa", "a"), size_t{0});47 EXPECT_EQ(LIBC_NAMESPACE::strcspn("aaa", "aa"), size_t{0});48 EXPECT_EQ(LIBC_NAMESPACE::strcspn("aaaa", "aa"), size_t{0});49 EXPECT_EQ(LIBC_NAMESPACE::strcspn("aaaa", "baa"), size_t{0});50}51 52TEST(LlvmLibcStrCSpnTest, TopBitSet) {53 EXPECT_EQ(LIBC_NAMESPACE::strcspn("hello\x80world", "\x80"), size_t{5});54}55