add a test file for regression tests, cmakelist.txt to get it build correctly

fuzz/regression_runner.cpp

@@ -0,0 +1,50 @@
+#include <boost/filesystem.hpp>
+#include <gtest/gtest.h>
+
+#include <fstream>
+#include <iostream>
+#include <vector>
+
+#include "unpack_pack_fuzzer.cpp"
+
+using ::testing::TestWithParam;
+using ::testing::ValuesIn;
+
+
+std::vector<std::string> ListDirectory(const std::string& path) {
+  std::vector<std::string> v;
+
+  boost::filesystem::path p(path);
+  boost::filesystem::directory_iterator f{p};
+
+  if(boost::filesystem::is_directory(p)) {
+    while (f != boost::filesystem::directory_iterator{}) {
+      v.push_back((*f++).path().string());
+    }
+  }
+  return v;
+}
+
+class UnpackPackFuzzerRegressionTest : public ::testing::TestWithParam<std::string> {
+public:
+};
+
+TEST_P(UnpackPackFuzzerRegressionTest, Returns0) {
+  auto fpath = GetParam();
+  std::ifstream in(fpath, std::ifstream::binary);
+  if (!in) {
+    FAIL() << fpath << " not found";
+  }
+  in.seekg(0, in.end);
+  size_t length = in.tellg();
+  in.seekg(0, in.beg);
+  std::vector<char> bytes(length);
+  in.read(bytes.data(), bytes.size());
+  assert(in);
+  EXPECT_EQ(0, LLVMFuzzerTestOneInput(reinterpret_cast<const uint8_t *>(bytes.data()),
+                                      bytes.size()));
+}
+
+INSTANTIATE_TEST_CASE_P(UnpackPackFuzzerRegressions,
+                        UnpackPackFuzzerRegressionTest,
+                        ::testing::ValuesIn(ListDirectory("../../fuzz/unpack_pack_fuzzer_regressions")));