libc/test/src/string/strcat_test.cpp

   1 //===-- Unittests for strcat ----------------------------------------------===//
   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/strcat.h"
  10 #include "test/UnitTest/Test.h"
  11
  12 TEST(LlvmLibcStrCatTest, EmptyDest) {
  13   const char *abc = "abc";
  14   char dest[4];
  15
  16   dest[0] = '\0';
  17
  18   char *result = LIBC_NAMESPACE::strcat(dest, abc);
  19   ASSERT_EQ(dest, result);
  20   ASSERT_STREQ(dest, result);
  21   ASSERT_STREQ(dest, abc);
  22 }
  23
  24 TEST(LlvmLibcStrCatTest, NonEmptyDest) {
  25   const char *abc = "abc";
  26   char dest[7];
  27
  28   dest[0] = 'x';
  29   dest[1] = 'y';
  30   dest[2] = 'z';
  31   dest[3] = '\0';
  32
  33   char *result = LIBC_NAMESPACE::strcat(dest, abc);
  34   ASSERT_EQ(dest, result);
  35   ASSERT_STREQ(dest, result);
  36   ASSERT_STREQ(dest, "xyzabc");
  37 }