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/*
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

#include <fcntl.h>
#include <sys/mman.h>

#include <cxxreact/JSBigString.h>
#include <gtest/gtest.h>

using namespace facebook::react;

namespace {
int tempFileFromString(std::string contents) {
  const char* tmpDir = getenv("TMPDIR");
  if (tmpDir == nullptr)
    tmpDir = "/tmp";
  std::string tmp{tmpDir};
  tmp += "/temp.XXXXXX";

std::vector<char> tmpBuf{tmp.begin(), tmp.end()};
  tmpBuf.push_back('\0');

const int fd = mkstemp(tmpBuf.data());
  write(fd, contents.c_str(), contents.size() + 1);

return fd;
}
}; // namespace

TEST(JSBigFileString, MapWholeFileTest) {
  std::string data{"Hello, world"};
  const auto size = data.length() + 1;

// Initialise Big String
  int fd = tempFileFromString("Hello, world");
  JSBigFileString bigStr{fd, size};

// Test
  ASSERT_STREQ(data.c_str(), bigStr.c_str());
}

TEST(JSBigFileString, MapPartTest) {
  std::string data{"Hello, world"};

// Sub-string to actually map
  std::string needle{"or"};
  off_t offset = data.find(needle);

// Initialise Big String
  int fd = tempFileFromString(data);
  JSBigFileString bigStr{fd, needle.size(), offset};

// Test
  EXPECT_EQ(needle.length(), bigStr.size());
  for (unsigned int i = 0; i < needle.length(); ++i) {
    EXPECT_EQ(needle[i], bigStr.c_str()[i]);
  }
}

TEST(JSBigFileString, MapPartAtLargeOffsetTest) {
  std::string data(8 * 4096, 'X');
  data += "Hello World!";

// Sub-string to actually map
  std::string needle{"or"};
  off_t offset = data.find(needle);

// Initialise Big String
  int fd = tempFileFromString(data);
  JSBigFileString bigStr{fd, needle.size(), offset};

// Test
  EXPECT_EQ(needle.length(), bigStr.size());
  for (unsigned int i = 0; i < needle.length(); ++i) {
    EXPECT_EQ(needle[i], bigStr.c_str()[i]);
  }
}

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Name	Size	Perms	Modified	Actions
jsarg_helpers.cpp	4.25 KB	lrw-r--r--	2025-03-28 11:04:39	Edit Download recursive recursive
jsbigstring.cpp	1.91 KB	lrw-r--r--	2025-03-28 11:04:39	Edit Download recursive recursive
methodcall.cpp	5.33 KB	lrw-r--r--	2025-03-28 11:04:39	Edit Download recursive recursive
RecoverableErrorTest.cpp	1.15 KB	lrw-r--r--	2025-03-28 11:04:39	Edit Download recursive recursive

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