cosmopolitan/test/libc/str/strlcpy_test.c

/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8                               :vi │
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 Justine Alexandra Roberts Tunney                              │
│                                                                              │
│ Permission to use, copy, modify, and/or distribute this software for         │
│ any purpose with or without fee is hereby granted, provided that the         │
│ above copyright notice and this permission notice appear in all copies.      │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
│ PERFORMANCE OF THIS SOFTWARE.                                                │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/mem/gc.h"
#include "libc/mem/mem.h"
#include "libc/str/str.h"
#include "libc/testlib/ezbench.h"
#include "libc/testlib/testlib.h"

TEST(strlcpy, testEmptyBuffer_doesNothing) {
  EXPECT_EQ(5, strlcpy(NULL, "hello", 0));
}

TEST(strlcpy, testShortBuffer_nulTerminates) {
  char buf[1] = {1};
  EXPECT_EQ(5, strlcpy(buf, "hello", 1));
  EXPECT_STREQ("", buf);
}

TEST(strlcpy, testShortBuffer_copies) {
  char buf[2] = {1, 1};
  EXPECT_EQ(5, strlcpy(buf, "hello", 2));
  EXPECT_STREQ("h", buf);
}

BENCH(strlcpy, bench) {
  char buf[256];
  EZBENCH2(
      "strlcpy", donothing,
      __expropriate(strlcpy(__veil("r", buf), "hello there", sizeof(buf))));
  EZBENCH2(
      "strncpy", donothing,
      __expropriate(strncpy(__veil("r", buf), "hello there", sizeof(buf))));
}