1 //===-- Unittests for isalpha----------------------------------------------===// 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-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "src/__support/CPP/span.h" 10 #include "src/ctype/isalpha.h" 11 12 #include "test/UnitTest/Test.h" 13 14 namespace { 15 16 // TODO: Merge the ctype tests using this framework. 17 constexpr char ALPHA_ARRAY[] = { 18 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 19 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', 20 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 21 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 22 }; 23 24 bool in_span(int ch, LIBC_NAMESPACE::cpp::span<const char> arr) { 25 for (size_t i = 0; i < arr.size(); ++i) 26 if (static_cast<int>(arr[i]) == ch) 27 return true; 28 return false; 29 } 30 31 } // namespace 32 33 TEST(LlvmLibcIsAlpha, SimpleTest) { 34 EXPECT_NE(LIBC_NAMESPACE::isalpha('a'), 0); 35 EXPECT_NE(LIBC_NAMESPACE::isalpha('B'), 0); 36 37 EXPECT_EQ(LIBC_NAMESPACE::isalpha('3'), 0); 38 EXPECT_EQ(LIBC_NAMESPACE::isalpha(' '), 0); 39 EXPECT_EQ(LIBC_NAMESPACE::isalpha('?'), 0); 40 EXPECT_EQ(LIBC_NAMESPACE::isalpha('\0'), 0); 41 EXPECT_EQ(LIBC_NAMESPACE::isalpha(-1), 0); 42 } 43 44 TEST(LlvmLibcIsAlpha, DefaultLocale) { 45 // Loops through all characters, verifying that letters return a 46 // non-zero integer and everything else returns zero. 47 // TODO: encoding indep 48 for (int ch = -255; ch < 255; ++ch) { 49 if (in_span(ch, ALPHA_ARRAY)) 50 EXPECT_NE(LIBC_NAMESPACE::isalpha(ch), 0); 51 else 52 EXPECT_EQ(LIBC_NAMESPACE::isalpha(ch), 0); 53 } 54 } 55