libc/test/src/string/strxfrm_test.cpp

   1 //===-- Unittests for strxfrm ---------------------------------------------===//
   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/string/strxfrm.h"
  10 #include "test/UnitTest/Test.h"
  11
  12 #include "src/string/string_utils.h"
  13
  14 // TODO: Add more comprehensive tests once locale support is added.
  15
  16 TEST(LlvmLibcStrxfrmTest, SimpleTestSufficientlySizedN) {
  17   const char *src = "abc";
  18   const size_t n = 5;
  19
  20   char dest[n];
  21   size_t result = LIBC_NAMESPACE::strxfrm(dest, src, n);
  22   ASSERT_EQ(result, LIBC_NAMESPACE::internal::string_length(src));
  23   ASSERT_STREQ(dest, src);
  24 }
  25
  26 TEST(LlvmLibcStrxfrmTest, SimpleTestExactSizedN) {
  27   const char *src = "abc";
  28   const size_t n = 4;
  29
  30   char dest[n];
  31   size_t result = LIBC_NAMESPACE::strxfrm(dest, src, n);
  32   ASSERT_EQ(result, LIBC_NAMESPACE::internal::string_length(src));
  33   ASSERT_STREQ(dest, src);
  34 }
  35
  36 TEST(LlvmLibcStrxfrmTest, SimpleTestInsufficientlySizedN) {
  37   const char *src = "abc";
  38   const size_t n = 3;
  39
  40   // Verify strxfrm does not modify dest if src len >= n
  41   char dest[n] = {'x', 'x', '\0'};
  42   size_t result = LIBC_NAMESPACE::strxfrm(dest, src, n);
  43   ASSERT_GE(result, n);
  44   ASSERT_STREQ(dest, "xx");
  45 }