libc/test/src/string/strcpy_test.cpp

   1 //===-- Unittests for strcpy ----------------------------------------------===//
   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/strcpy.h"
  10 #include "test/UnitTest/Test.h"
  11
  12 TEST(LlvmLibcStrCpyTest, EmptySrc) {
  13   const char *empty = "";
  14   char dest[4] = {'a', 'b', 'c', '\0'};
  15
  16   char *result = LIBC_NAMESPACE::strcpy(dest, empty);
  17   ASSERT_EQ(dest, result);
  18   ASSERT_STREQ(dest, result);
  19   ASSERT_STREQ(dest, empty);
  20 }
  21
  22 TEST(LlvmLibcStrCpyTest, EmptyDest) {
  23   const char *abc = "abc";
  24   char dest[4];
  25
  26   char *result = LIBC_NAMESPACE::strcpy(dest, abc);
  27   ASSERT_EQ(dest, result);
  28   ASSERT_STREQ(dest, result);
  29   ASSERT_STREQ(dest, abc);
  30 }
  31
  32 TEST(LlvmLibcStrCpyTest, OffsetDest) {
  33   const char *abc = "abc";
  34   char dest[7];
  35
  36   dest[0] = 'x';
  37   dest[1] = 'y';
  38   dest[2] = 'z';
  39
  40   char *result = LIBC_NAMESPACE::strcpy(dest + 3, abc);
  41   ASSERT_EQ(dest + 3, result);
  42   ASSERT_STREQ(dest + 3, result);
  43   ASSERT_STREQ(dest, "xyzabc");
  44 }