react-native/ReactCommon/cxxreact/tests/jsbigstring.cpp

57 lines
1.3 KiB
C++

// Copyright 2004-present Facebook. All Rights Reserved.
#include <sys/mman.h>
#include <fcntl.h>
#include <folly/File.h>
#include <gtest/gtest.h>
#include <cxxreact/JSBigString.h>
using namespace facebook;
using namespace facebook::react;
namespace {
int tempFileFromString(std::string contents)
{
std::string tmp {getenv("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;
}
};
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
ASSERT_EQ(needle.length(), bigStr.size());
for (unsigned int i = 0; i < needle.length(); ++i) {
ASSERT_EQ(needle[i], bigStr.c_str()[i]);
}
}