Add fuzz corpus and blackbox tests

TestDriver.cpp

@@ -0,0 +1,16 @@
+#include <cstdint>
+#include <fstream>
+#include <sstream>
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size);
+
+int main(int argc, char **argv) {
+  for (int i = 1; i < argc; ++i) {
+    std::ifstream t(argv[i], std::ios::binary);
+    std::stringstream buffer;
+    buffer << t.rdbuf();
+    auto str = buffer.str();
+    LLVMFuzzerTestOneInput(reinterpret_cast<const uint8_t *>(str.data()),
+                           str.size());
+  }
+}