1 //===-- Unittests for islower----------------------------------------------===// 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/islower.h" 11 12 #include "test/UnitTest/Test.h" 13 14 namespace { 15 16 // TODO: Merge the ctype tests using this framework. 17 constexpr char LOWER_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 }; 21 22 bool in_span(int ch, LIBC_NAMESPACE::cpp::span<const char> arr) { 23 for (size_t i = 0; i < arr.size(); ++i) 24 if (static_cast<int>(arr[i]) == ch) 25 return true; 26 return false; 27 } 28 29 } // namespace 30 31 TEST(LlvmLibcIsLower, SimpleTest) { 32 EXPECT_NE(LIBC_NAMESPACE::islower('a'), 0); 33 34 EXPECT_EQ(LIBC_NAMESPACE::islower('B'), 0); 35 EXPECT_EQ(LIBC_NAMESPACE::islower('3'), 0); 36 EXPECT_EQ(LIBC_NAMESPACE::islower(' '), 0); 37 EXPECT_EQ(LIBC_NAMESPACE::islower('?'), 0); 38 EXPECT_EQ(LIBC_NAMESPACE::islower('\0'), 0); 39 EXPECT_EQ(LIBC_NAMESPACE::islower(-1), 0); 40 } 41 42 TEST(LlvmLibcIsLower, DefaultLocale) { 43 // Loops through all characters, verifying that numbers and letters 44 // return non-zero integer and everything else returns a zero. 45 for (int ch = -255; ch < 255; ++ch) { 46 if (in_span(ch, LOWER_ARRAY)) 47 EXPECT_NE(LIBC_NAMESPACE::islower(ch), 0); 48 else 49 EXPECT_EQ(LIBC_NAMESPACE::islower(ch), 0); 50 } 51 } 52