Initial commit

tests/common/utils/TestFolly.cc

@@ -0,0 +1,27 @@
+#include <folly/hash/Checksum.h>
+#include <folly/logging/xlog.h>
+
+#include "tests/GtestHelpers.h"
+
+namespace hf3fs::tests {
+namespace {
+
+TEST(Folly, CRC32C) {
+  std::string a = "hello";
+  auto crc1 = folly::crc32c(reinterpret_cast<const uint8_t *>(a.data()), a.size(), 0);
+
+  std::string b = "world";
+  auto crc2 = folly::crc32c(reinterpret_cast<const uint8_t *>(b.data()), b.size(), 0);
+
+  auto x = folly::crc32c_combine(crc1, crc2, b.size());
+  auto y = folly::crc32c(reinterpret_cast<const uint8_t *>(b.data()), b.size(), crc1);
+  ASSERT_EQ(x, y);
+
+  auto crc32c1 = ~0x14298C12;  // 1MB zero.
+  auto crc32c2 = ~0x527D5351;  // one zero.
+  auto out = folly::crc32c_combine(~crc32c1, crc32c2, 1);
+  XLOGF(INFO, "{:08X} {:08X}", out, ~out);
+}
+
+}  // namespace
+}  // namespace hf3fs::tests