libc/test/src/string/mempcpy_test.cpp

   1 //===-- Unittests for mempcpy ---------------------------------------------===//
   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/mempcpy.h"
  10 #include "test/UnitTest/Test.h"
  11
  12 // Since this function just calls out to memcpy, and memcpy has its own unit
  13 // tests, it is assumed that memcpy works. These tests are just for the specific
  14 // mempcpy behavior (returning the end of what was copied).
  15 TEST(LlvmLibcMempcpyTest, Simple) {
  16   const char *src = "12345";
  17   char dest[10];
  18   void *result = __llvm_libc::mempcpy(dest, src, 6);
  19   ASSERT_EQ(static_cast<char *>(result), dest + 6);
  20   ASSERT_STREQ(src, dest);
  21 }
  22
  23 TEST(LlvmLibcMempcpyTest, ZeroCount) {
  24   const char *src = "12345";
  25   char dest[10];
  26   void *result = __llvm_libc::mempcpy(dest, src, 0);
  27   ASSERT_EQ(static_cast<char *>(result), dest + 0);
  28 }