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#include <cstdio>
#include <string>
#include <array>
#include <gtest/gtest.h>
#include "caffe2/serialize/inline_container.h"
#include "c10/util/irange.h"
namespace caffe2 {
namespace serialize {
namespace {
TEST(PyTorchStreamWriterAndReader, SaveAndLoad) {
int64_t kFieldAlignment = 64L;
std::ostringstream oss;
// write records through writers
PyTorchStreamWriter writer([&](const void* b, size_t n) -> size_t {
oss.write(static_cast<const char*>(b), n);
return oss ? n : 0;
});
// NOLINTNEXTLINE(cppcoreguidelines-pro-type-member-init,cppcoreguidelines-avoid-magic-numbers)
std::array<char, 127> data1;
for (auto i: c10::irange( data1.size())) {
data1[i] = data1.size() - i;
}
writer.writeRecord("key1", data1.data(), data1.size());
// NOLINTNEXTLINE(cppcoreguidelines-pro-type-member-init,cppcoreguidelines-avoid-magic-numbers)
std::array<char, 64> data2;
for (auto i: c10::irange(data2.size())) {
data2[i] = data2.size() - i;
}
writer.writeRecord("key2", data2.data(), data2.size());
const std::unordered_set<std::string>& written_records =
writer.getAllWrittenRecords();
ASSERT_EQ(written_records.size(), 2);
ASSERT_EQ(written_records.count("key1"), 1);
ASSERT_EQ(written_records.count("key2"), 1);
writer.writeEndOfFile();
std::string the_file = oss.str();
std::ofstream foo("output.zip");
foo.write(the_file.c_str(), the_file.size());
foo.close();
std::istringstream iss(the_file);
// read records through readers
PyTorchStreamReader reader(&iss);
ASSERT_TRUE(reader.hasRecord("key1"));
ASSERT_TRUE(reader.hasRecord("key2"));
ASSERT_FALSE(reader.hasRecord("key2000"));
at::DataPtr data_ptr;
// NOLINTNEXTLINE(cppcoreguidelines-init-variables)
int64_t size;
std::tie(data_ptr, size) = reader.getRecord("key1");
size_t off1 = reader.getRecordOffset("key1");
ASSERT_EQ(size, data1.size());
ASSERT_EQ(memcmp(data_ptr.get(), data1.data(), data1.size()), 0);
ASSERT_EQ(memcmp(the_file.c_str() + off1, data1.data(), data1.size()), 0);
ASSERT_EQ(off1 % kFieldAlignment, 0);
std::tie(data_ptr, size) = reader.getRecord("key2");
size_t off2 = reader.getRecordOffset("key2");
ASSERT_EQ(off2 % kFieldAlignment, 0);
ASSERT_EQ(size, data2.size());
ASSERT_EQ(memcmp(data_ptr.get(), data2.data(), data2.size()), 0);
ASSERT_EQ(memcmp(the_file.c_str() + off2, data2.data(), data2.size()), 0);
}
TEST(PytorchStreamWriterAndReader, GetNonexistentRecordThrows) {
std::ostringstream oss;
// write records through writers
PyTorchStreamWriter writer([&](const void* b, size_t n) -> size_t {
oss.write(static_cast<const char*>(b), n);
return oss ? n : 0;
});
// NOLINTNEXTLINE(cppcoreguidelines-pro-type-member-init,cppcoreguidelines-avoid-magic-numbers)
std::array<char, 127> data1;
for (auto i: c10::irange(data1.size())) {
data1[i] = data1.size() - i;
}
writer.writeRecord("key1", data1.data(), data1.size());
// NOLINTNEXTLINE(cppcoreguidelines-pro-type-member-init,cppcoreguidelines-avoid-magic-numbers)
std::array<char, 64> data2;
for (auto i: c10::irange(data2.size())) {
data2[i] = data2.size() - i;
}
writer.writeRecord("key2", data2.data(), data2.size());
const std::unordered_set<std::string>& written_records =
writer.getAllWrittenRecords();
ASSERT_EQ(written_records.size(), 2);
ASSERT_EQ(written_records.count("key1"), 1);
ASSERT_EQ(written_records.count("key2"), 1);
writer.writeEndOfFile();
std::string the_file = oss.str();
std::ofstream foo("output2.zip");
foo.write(the_file.c_str(), the_file.size());
foo.close();
std::istringstream iss(the_file);
// read records through readers
PyTorchStreamReader reader(&iss);
// NOLINTNEXTLINE(hicpp-avoid-goto,cppcoreguidelines-avoid-goto)
EXPECT_THROW(reader.getRecord("key3"), c10::Error);
// Reader should still work after throwing
EXPECT_TRUE(reader.hasRecord("key1"));
}
} // namespace
} // namespace serialize
} // namespace caffe2
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