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/ctype/islower.h"
10 #include "utils/UnitTest/Test.h"
11 
TEST(LlvmLibcIsLower,DefaultLocale)12 TEST(LlvmLibcIsLower, DefaultLocale) {
13   // Loops through all characters, verifying that lowercase letters
14   // return a non-zero integer and everything else returns zero.
15   for (int ch = 0; ch < 255; ++ch) {
16     if ('a' <= ch && ch <= 'z')
17       EXPECT_NE(__llvm_libc::islower(ch), 0);
18     else
19       EXPECT_EQ(__llvm_libc::islower(ch), 0);
20   }
21 }
22