64 lines
1.5 KiB
C++
64 lines
1.5 KiB
C++
/*
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#include <fcntl.h>
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#include <sys/mman.h>
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#include <cxxreact/JSBigString.h>
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#include <folly/File.h>
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#include <gtest/gtest.h>
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using namespace facebook::react;
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namespace {
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int tempFileFromString(std::string contents) {
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const char *tmpDir = getenv("TMPDIR");
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if (tmpDir == nullptr)
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tmpDir = "/tmp";
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std::string tmp{tmpDir};
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tmp += "/temp.XXXXXX";
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std::vector<char> tmpBuf{tmp.begin(), tmp.end()};
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tmpBuf.push_back('\0');
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const int fd = mkstemp(tmpBuf.data());
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write(fd, contents.c_str(), contents.size() + 1);
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return fd;
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}
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}; // namespace
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TEST(JSBigFileString, MapWholeFileTest) {
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std::string data{"Hello, world"};
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const auto size = data.length() + 1;
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// Initialise Big String
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int fd = tempFileFromString("Hello, world");
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JSBigFileString bigStr{fd, size};
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// Test
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ASSERT_STREQ(data.c_str(), bigStr.c_str());
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}
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TEST(JSBigFileString, MapPartTest) {
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std::string data{"Hello, world"};
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// Sub-string to actually map
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std::string needle{"or"};
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off_t offset = data.find(needle);
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// Initialise Big String
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int fd = tempFileFromString(data);
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JSBigFileString bigStr{fd, needle.size(), offset};
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// Test
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EXPECT_EQ(needle.length(), bigStr.size());
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for (unsigned int i = 0; i < needle.length(); ++i) {
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EXPECT_EQ(needle[i], bigStr.c_str()[i]);
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}
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}
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