libc/test/src/string/stpcpy_test.cpp

   1 //===-- Unittests for stpcpy ----------------------------------------------===//
   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/stpcpy.h"
  10 #include "test/UnitTest/Test.h"
  11
  12 #include "src/string/string_utils.h"
  13
  14 TEST(LlvmLibcStpCpyTest, EmptySrc) {
  15   const char *empty = "";
  16   size_t src_size = LIBC_NAMESPACE::internal::string_length(empty);
  17   char dest[4] = {'a', 'b', 'c', '\0'};
  18
  19   char *result = LIBC_NAMESPACE::stpcpy(dest, empty);
  20   ASSERT_EQ(dest + src_size, result);
  21   ASSERT_EQ(result[0], '\0');
  22   ASSERT_STREQ(dest, empty);
  23 }
  24
  25 TEST(LlvmLibcStpCpyTest, EmptyDest) {
  26   const char *abc = "abc";
  27   size_t src_size = LIBC_NAMESPACE::internal::string_length(abc);
  28   char dest[4];
  29
  30   char *result = LIBC_NAMESPACE::stpcpy(dest, abc);
  31   ASSERT_EQ(dest + src_size, result);
  32   ASSERT_EQ(result[0], '\0');
  33   ASSERT_STREQ(dest, abc);
  34 }
  35
  36 TEST(LlvmLibcStpCpyTest, OffsetDest) {
  37   const char *abc = "abc";
  38   size_t src_size = LIBC_NAMESPACE::internal::string_length(abc);
  39   char dest[7] = {'x', 'y', 'z'};
  40
  41   char *result = LIBC_NAMESPACE::stpcpy(dest + 3, abc);
  42   ASSERT_EQ(dest + 3 + src_size, result);
  43   ASSERT_EQ(result[0], '\0');
  44   ASSERT_STREQ(dest, "xyzabc");
  45 }